mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
5368051610
feat: expose raw devtools protocol connection This patch introduces `target.createCDPSession` method that allows directly communicating with the target over the Chrome DevTools Protocol. Fixes #31.
2329 lines
107 KiB
Markdown
2329 lines
107 KiB
Markdown
##### Released API: [v0.13.0](https://github.com/GoogleChrome/puppeteer/blob/v0.13.0/docs/api.md) | [v0.12.0](https://github.com/GoogleChrome/puppeteer/blob/v0.12.0/docs/api.md) | [v0.11.0](https://github.com/GoogleChrome/puppeteer/blob/v0.11.0/docs/api.md) | [v0.10.2](https://github.com/GoogleChrome/puppeteer/blob/v0.10.2/docs/api.md) | [v0.10.1](https://github.com/GoogleChrome/puppeteer/blob/v0.10.1/docs/api.md) | [v0.10.0](https://github.com/GoogleChrome/puppeteer/blob/v0.10.0/docs/api.md) | [v0.9.0](https://github.com/GoogleChrome/puppeteer/blob/v0.9.0/docs/api.md)
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# Puppeteer API v<!-- GEN:version -->1.0.0-rc<!-- GEN:stop-->
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##### Table of Contents
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<!-- toc -->
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- [Overview](#overview)
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- [Environment Variables](#environment-variables)
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- [class: Puppeteer](#class-puppeteer)
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* [puppeteer.connect(options)](#puppeteerconnectoptions)
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* [puppeteer.defaultArgs()](#puppeteerdefaultargs)
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* [puppeteer.executablePath()](#puppeteerexecutablepath)
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* [puppeteer.launch([options])](#puppeteerlaunchoptions)
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- [class: Browser](#class-browser)
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* [event: 'disconnected'](#event-disconnected)
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* [event: 'targetchanged'](#event-targetchanged)
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* [event: 'targetcreated'](#event-targetcreated)
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* [event: 'targetdestroyed'](#event-targetdestroyed)
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* [browser.close()](#browserclose)
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* [browser.disconnect()](#browserdisconnect)
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* [browser.newPage()](#browsernewpage)
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* [browser.pages()](#browserpages)
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* [browser.process()](#browserprocess)
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* [browser.targets()](#browsertargets)
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* [browser.userAgent()](#browseruseragent)
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* [browser.version()](#browserversion)
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* [browser.wsEndpoint()](#browserwsendpoint)
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- [class: Page](#class-page)
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* [event: 'console'](#event-console)
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* [event: 'dialog'](#event-dialog)
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* [event: 'error'](#event-error)
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* [event: 'frameattached'](#event-frameattached)
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* [event: 'framedetached'](#event-framedetached)
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* [event: 'framenavigated'](#event-framenavigated)
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* [event: 'load'](#event-load)
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* [event: 'metrics'](#event-metrics)
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* [event: 'pageerror'](#event-pageerror)
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* [event: 'request'](#event-request)
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* [event: 'requestfailed'](#event-requestfailed)
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* [event: 'requestfinished'](#event-requestfinished)
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* [event: 'response'](#event-response)
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* [page.$(selector)](#pageselector)
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* [page.$$(selector)](#pageselector)
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* [page.$$eval(selector, pageFunction[, ...args])](#pageevalselector-pagefunction-args)
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* [page.$eval(selector, pageFunction[, ...args])](#pageevalselector-pagefunction-args)
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* [page.$x(expression)](#pagexexpression)
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* [page.addScriptTag(options)](#pageaddscripttagoptions)
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* [page.addStyleTag(options)](#pageaddstyletagoptions)
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* [page.authenticate(credentials)](#pageauthenticatecredentials)
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* [page.bringToFront()](#pagebringtofront)
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* [page.click(selector[, options])](#pageclickselector-options)
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* [page.close()](#pageclose)
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* [page.content()](#pagecontent)
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* [page.cookies(...urls)](#pagecookiesurls)
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* [page.coverage](#pagecoverage)
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* [page.deleteCookie(...cookies)](#pagedeletecookiecookies)
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* [page.emulate(options)](#pageemulateoptions)
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* [page.emulateMedia(mediaType)](#pageemulatemediamediatype)
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* [page.evaluate(pageFunction, ...args)](#pageevaluatepagefunction-args)
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* [page.evaluateHandle(pageFunction, ...args)](#pageevaluatehandlepagefunction-args)
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* [page.evaluateOnNewDocument(pageFunction, ...args)](#pageevaluateonnewdocumentpagefunction-args)
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* [page.exposeFunction(name, puppeteerFunction)](#pageexposefunctionname-puppeteerfunction)
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* [page.focus(selector)](#pagefocusselector)
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* [page.frames()](#pageframes)
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* [page.goBack(options)](#pagegobackoptions)
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* [page.goForward(options)](#pagegoforwardoptions)
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* [page.goto(url, options)](#pagegotourl-options)
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* [page.hover(selector)](#pagehoverselector)
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* [page.keyboard](#pagekeyboard)
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* [page.mainFrame()](#pagemainframe)
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* [page.metrics()](#pagemetrics)
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* [page.mouse](#pagemouse)
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* [page.pdf(options)](#pagepdfoptions)
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* [page.queryObjects(prototypeHandle)](#pagequeryobjectsprototypehandle)
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* [page.reload(options)](#pagereloadoptions)
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* [page.screenshot([options])](#pagescreenshotoptions)
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* [page.select(selector, ...values)](#pageselectselector-values)
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* [page.setContent(html)](#pagesetcontenthtml)
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* [page.setCookie(...cookies)](#pagesetcookiecookies)
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* [page.setDefaultNavigationTimeout(timeout)](#pagesetdefaultnavigationtimeouttimeout)
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* [page.setExtraHTTPHeaders(headers)](#pagesetextrahttpheadersheaders)
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* [page.setJavaScriptEnabled(enabled)](#pagesetjavascriptenabledenabled)
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* [page.setOfflineMode(enabled)](#pagesetofflinemodeenabled)
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* [page.setRequestInterception(value)](#pagesetrequestinterceptionvalue)
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* [page.setUserAgent(userAgent)](#pagesetuseragentuseragent)
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* [page.setViewport(viewport)](#pagesetviewportviewport)
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* [page.tap(selector)](#pagetapselector)
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* [page.target()](#pagetarget)
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* [page.title()](#pagetitle)
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* [page.touchscreen](#pagetouchscreen)
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* [page.tracing](#pagetracing)
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* [page.type(selector, text[, options])](#pagetypeselector-text-options)
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* [page.url()](#pageurl)
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* [page.viewport()](#pageviewport)
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* [page.waitFor(selectorOrFunctionOrTimeout[, options[, ...args]])](#pagewaitforselectororfunctionortimeout-options-args)
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* [page.waitForFunction(pageFunction[, options[, ...args]])](#pagewaitforfunctionpagefunction-options-args)
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* [page.waitForNavigation(options)](#pagewaitfornavigationoptions)
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* [page.waitForSelector(selector[, options])](#pagewaitforselectorselector-options)
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- [class: Keyboard](#class-keyboard)
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* [keyboard.down(key[, options])](#keyboarddownkey-options)
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* [keyboard.press(key[, options])](#keyboardpresskey-options)
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* [keyboard.sendCharacter(char)](#keyboardsendcharacterchar)
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* [keyboard.type(text, options)](#keyboardtypetext-options)
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* [keyboard.up(key)](#keyboardupkey)
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- [class: Mouse](#class-mouse)
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* [mouse.click(x, y, [options])](#mouseclickx-y-options)
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* [mouse.down([options])](#mousedownoptions)
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* [mouse.move(x, y, [options])](#mousemovex-y-options)
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* [mouse.up([options])](#mouseupoptions)
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- [class: Touchscreen](#class-touchscreen)
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* [touchscreen.tap(x, y)](#touchscreentapx-y)
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- [class: Tracing](#class-tracing)
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* [tracing.start(options)](#tracingstartoptions)
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* [tracing.stop()](#tracingstop)
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- [class: Dialog](#class-dialog)
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* [dialog.accept([promptText])](#dialogacceptprompttext)
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* [dialog.defaultValue()](#dialogdefaultvalue)
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* [dialog.dismiss()](#dialogdismiss)
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* [dialog.message()](#dialogmessage)
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* [dialog.type()](#dialogtype)
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- [class: ConsoleMessage](#class-consolemessage)
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* [consoleMessage.args()](#consolemessageargs)
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* [consoleMessage.text()](#consolemessagetext)
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* [consoleMessage.type()](#consolemessagetype)
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- [class: Frame](#class-frame)
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* [frame.$(selector)](#frameselector)
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* [frame.$$(selector)](#frameselector)
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* [frame.$$eval(selector, pageFunction[, ...args])](#frameevalselector-pagefunction-args)
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* [frame.$eval(selector, pageFunction[, ...args])](#frameevalselector-pagefunction-args)
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* [frame.$x(expression)](#framexexpression)
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* [frame.addScriptTag(options)](#frameaddscripttagoptions)
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* [frame.addStyleTag(options)](#frameaddstyletagoptions)
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* [frame.childFrames()](#framechildframes)
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* [frame.content()](#framecontent)
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* [frame.evaluate(pageFunction, ...args)](#frameevaluatepagefunction-args)
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* [frame.executionContext()](#frameexecutioncontext)
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* [frame.isDetached()](#frameisdetached)
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* [frame.name()](#framename)
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* [frame.parentFrame()](#frameparentframe)
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* [frame.select(selector, ...values)](#frameselectselector-values)
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* [frame.setContent(html)](#framesetcontenthtml)
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* [frame.title()](#frametitle)
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* [frame.url()](#frameurl)
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* [frame.waitFor(selectorOrFunctionOrTimeout[, options[, ...args]])](#framewaitforselectororfunctionortimeout-options-args)
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* [frame.waitForFunction(pageFunction[, options[, ...args]])](#framewaitforfunctionpagefunction-options-args)
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* [frame.waitForSelector(selector[, options])](#framewaitforselectorselector-options)
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- [class: ExecutionContext](#class-executioncontext)
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* [executionContext.evaluate(pageFunction, ...args)](#executioncontextevaluatepagefunction-args)
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* [executionContext.evaluateHandle(pageFunction, ...args)](#executioncontextevaluatehandlepagefunction-args)
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* [executionContext.queryObjects(prototypeHandle)](#executioncontextqueryobjectsprototypehandle)
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- [class: JSHandle](#class-jshandle)
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* [jsHandle.asElement()](#jshandleaselement)
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* [jsHandle.dispose()](#jshandledispose)
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* [jsHandle.executionContext()](#jshandleexecutioncontext)
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* [jsHandle.getProperties()](#jshandlegetproperties)
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* [jsHandle.getProperty(propertyName)](#jshandlegetpropertypropertyname)
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* [jsHandle.jsonValue()](#jshandlejsonvalue)
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- [class: ElementHandle](#class-elementhandle)
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* [elementHandle.$(selector)](#elementhandleselector)
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* [elementHandle.$$(selector)](#elementhandleselector)
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* [elementHandle.$x(expression)](#elementhandlexexpression)
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* [elementHandle.asElement()](#elementhandleaselement)
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* [elementHandle.boundingBox()](#elementhandleboundingbox)
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* [elementHandle.click([options])](#elementhandleclickoptions)
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* [elementHandle.dispose()](#elementhandledispose)
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* [elementHandle.executionContext()](#elementhandleexecutioncontext)
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* [elementHandle.focus()](#elementhandlefocus)
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* [elementHandle.getProperties()](#elementhandlegetproperties)
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* [elementHandle.getProperty(propertyName)](#elementhandlegetpropertypropertyname)
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* [elementHandle.hover()](#elementhandlehover)
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* [elementHandle.jsonValue()](#elementhandlejsonvalue)
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* [elementHandle.press(key[, options])](#elementhandlepresskey-options)
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* [elementHandle.screenshot([options])](#elementhandlescreenshotoptions)
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* [elementHandle.tap()](#elementhandletap)
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* [elementHandle.toString()](#elementhandletostring)
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* [elementHandle.type(text[, options])](#elementhandletypetext-options)
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* [elementHandle.uploadFile(...filePaths)](#elementhandleuploadfilefilepaths)
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- [class: Request](#class-request)
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* [request.abort([errorCode])](#requestaborterrorcode)
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* [request.continue([overrides])](#requestcontinueoverrides)
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* [request.failure()](#requestfailure)
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* [request.frame()](#requestframe)
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* [request.headers()](#requestheaders)
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* [request.method()](#requestmethod)
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* [request.postData()](#requestpostdata)
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* [request.resourceType()](#requestresourcetype)
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* [request.respond(response)](#requestrespondresponse)
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* [request.response()](#requestresponse)
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* [request.url()](#requesturl)
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- [class: Response](#class-response)
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* [response.buffer()](#responsebuffer)
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* [response.headers()](#responseheaders)
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* [response.json()](#responsejson)
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* [response.ok()](#responseok)
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* [response.request()](#responserequest)
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* [response.status()](#responsestatus)
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* [response.text()](#responsetext)
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* [response.url()](#responseurl)
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- [class: Target](#class-target)
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* [target.createCDPSession()](#targetcreatecdpsession)
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* [target.page()](#targetpage)
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* [target.type()](#targettype)
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* [target.url()](#targeturl)
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- [class: CDPSession](#class-cdpsession)
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* [cdpSession.detach()](#cdpsessiondetach)
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* [cdpSession.send(method[, params])](#cdpsessionsendmethod-params)
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- [class: Coverage](#class-coverage)
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* [coverage.startCSSCoverage(options)](#coveragestartcsscoverageoptions)
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* [coverage.startJSCoverage(options)](#coveragestartjscoverageoptions)
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* [coverage.stopCSSCoverage()](#coveragestopcsscoverage)
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* [coverage.stopJSCoverage()](#coveragestopjscoverage)
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<!-- tocstop -->
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### Overview
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Puppeteer is a Node library which provides a high-level API to control Chromium or Chrome over the DevTools Protocol.
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Puppeteer API is hierarchical and mirrors browser structure. On the following diagram, faded entities are not currently represented in Puppeteer.
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- [`Puppeteer`](#class-puppeteer) communicates with browser using [devtools protocol](https://chromedevtools.github.io/devtools-protocol/).
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- [`Browser`](#class-browser) instance owns multiple pages.
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- [`Page`](#class-page) has at least one frame: main frame. There might be other frames created by [iframe](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe) or [frame](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/frame) tags.
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- [`Frame`](#class-frame) has at least one execution context - default execution context - where frame's JavaScript is executed. Frame might have additional execution contexts associated with [extensions](https://developer.chrome.com/extensions).
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(Diagram source: [link](https://docs.google.com/drawings/d/1Q_AM6KYs9kbyLZF-Lpp5mtpAWth73Cq8IKCsWYgi8MM/edit?usp=sharing))
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### Environment Variables
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Puppeteer looks for certain [environment variables](https://en.wikipedia.org/wiki/Environment_variable) to aid its operations. These variables can either be set in the environment or in the [npm config](https://docs.npmjs.com/cli/config).
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- `HTTP_PROXY`, `HTTPS_PROXY`, `NO_PROXY` - defines HTTP proxy settings that are used to download and run Chromium.
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- `PUPPETEER_SKIP_CHROMIUM_DOWNLOAD` - do not download bundled Chromium during installation step.
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- `PUPPETEER_DOWNLOAD_HOST` - overwrite host part of URL that is used to download Chromium
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### class: Puppeteer
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Puppeteer module provides a method to launch a Chromium instance.
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The following is a typical example of using a Puppeteer to drive automation:
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```js
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const puppeteer = require('puppeteer');
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puppeteer.launch().then(async browser => {
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const page = await browser.newPage();
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await page.goto('https://www.google.com');
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// other actions...
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await browser.close();
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});
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```
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#### puppeteer.connect(options)
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- `options` <[Object]>
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- `browserWSEndpoint` <[string]> a [browser websocket endpoint](#browserwsendpoint) to connect to.
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- `ignoreHTTPSErrors` <[boolean]> Whether to ignore HTTPS errors during navigation. Defaults to `false`.
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- returns: <[Promise]<[Browser]>>
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This methods attaches Puppeteer to an existing Chromium instance.
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#### puppeteer.defaultArgs()
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- returns: <[Array]<[string]>> The default flags that Chromium will be launched with.
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#### puppeteer.executablePath()
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- returns: <[string]> A path where Puppeteer expects to find bundled Chromium. Chromium might not exist there if the download was skipped with [`PUPPETEER_SKIP_CHROMIUM_DOWNLOAD`](#environment-variables).
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#### puppeteer.launch([options])
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- `options` <[Object]> Set of configurable options to set on the browser. Can have the following fields:
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- `ignoreHTTPSErrors` <[boolean]> Whether to ignore HTTPS errors during navigation. Defaults to `false`.
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- `headless` <[boolean]> Whether to run browser in [headless mode](https://developers.google.com/web/updates/2017/04/headless-chrome). Defaults to `true` unless the `devtools` option is `true`.
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- `executablePath` <[string]> Path to a Chromium or Chrome executable to run instead of bundled Chromium. If `executablePath` is a relative path, then it is resolved relative to [current working directory](https://nodejs.org/api/process.html#process_process_cwd).
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- `slowMo` <[number]> Slows down Puppeteer operations by the specified amount of milliseconds. Useful so that you can see what is going on.
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- `args` <[Array]<[string]>> Additional arguments to pass to the browser instance. List of Chromium flags can be found [here](http://peter.sh/experiments/chromium-command-line-switches/).
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- `ignoreDefaultArgs` <[boolean]> Do not use [`puppeteer.defaultArgs()`](#puppeteerdefaultargs). Dangerous option; use with care. Defaults to `false`.
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- `handleSIGINT` <[boolean]> Close browser process on Ctrl-C. Defaults to `true`.
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- `handleSIGTERM` <[boolean]> Close browser process on SIGTERM. Defaults to `true`.
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- `handleSIGHUP` <[boolean]> Close browser process on SIGHUP. Defaults to `true`.
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- `timeout` <[number]> Maximum time in milliseconds to wait for the browser instance to start. Defaults to `30000` (30 seconds). Pass `0` to disable timeout.
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- `dumpio` <[boolean]> Whether to pipe browser process stdout and stderr into `process.stdout` and `process.stderr`. Defaults to `false`.
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- `userDataDir` <[string]> Path to a [User Data Directory](https://chromium.googlesource.com/chromium/src/+/master/docs/user_data_dir.md).
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- `env` <[Object]> Specify environment variables that will be visible to browser. Defaults to `process.env`.
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- `devtools` <[boolean]> Whether to auto-open DevTools panel for each tab. If this option is `true`, the `headless` option will be set `false`.
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- returns: <[Promise]<[Browser]>> Promise which resolves to browser instance.
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The method launches a browser instance with given arguments. The browser will be closed when the parent node.js process is closed.
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> **NOTE** Puppeteer can also be used to control the Chrome browser, but it works best with the version of Chromium it is bundled with. There is no
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guarantee it will work with any other version. Use `executablePath` option with extreme caution.
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If Google Chrome (rather than Chromium) is preferred, a [Chrome Canary](https://www.google.com/chrome/browser/canary.html) or [Dev Channel](https://www.chromium.org/getting-involved/dev-channel) build is suggested.
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>
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> In [puppeteer.launch([options])](#puppeteerlaunchoptions) above, any mention of Chromium also applies to Chrome.
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>
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> See [`this article`](https://www.howtogeek.com/202825/what%E2%80%99s-the-difference-between-chromium-and-chrome/) for a description
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of the differences between Chromium and Chrome. [`This article`](https://chromium.googlesource.com/chromium/src/+/lkcr/docs/chromium_browser_vs_google_chrome.md) describes some differences for Linux users.
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### class: Browser
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* extends: [`EventEmitter`](https://nodejs.org/api/events.html#events_class_eventemitter)
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A Browser is created when Puppeteer connects to a Chromium instance, either through [`puppeteer.launch`](#puppeteerlaunchoptions) or [`puppeteer.connect`](#puppeteerconnectoptions).
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An example of using a [Browser] to create a [Page]:
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```js
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const puppeteer = require('puppeteer');
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puppeteer.launch().then(async browser => {
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const page = await browser.newPage();
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await page.goto('https://example.com');
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await browser.close();
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});
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```
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An example of disconnecting from and reconnecting to a [Browser]:
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```js
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const puppeteer = require('puppeteer');
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puppeteer.launch().then(async browser => {
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// Store the endpoint to be able to reconnect to Chromium
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const browserWSEndpoint = browser.wsEndpoint();
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// Disconnect puppeteer from Chromium
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browser.disconnect();
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// Use the endpoint to reestablish a connection
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const browser2 = await puppeteer.connect({browserWSEndpoint});
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// Close Chromium
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await browser2.close();
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});
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```
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#### event: 'disconnected'
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Emitted when puppeteer gets disconnected from the Chromium instance. This might happen because one of the following:
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- Chromium is closed or crashed
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- `browser.disconnect` method was called
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#### event: 'targetchanged'
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- <[Target]>
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Emitted when the url of a target changes.
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#### event: 'targetcreated'
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- <[Target]>
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Emitted when a target is created, for example when a new page is opened by [`window.open`](https://developer.mozilla.org/en-US/docs/Web/API/Window/open) or [`browser.newPage`](#browsernewpage).
|
|
|
|
#### event: 'targetdestroyed'
|
|
- <[Target]>
|
|
|
|
Emitted when a target is destroyed, for example when a page is closed.
|
|
|
|
#### browser.close()
|
|
- returns: <[Promise]>
|
|
|
|
Closes Chromium and all of its pages (if any were opened). The browser object itself is considered disposed and cannot be used anymore.
|
|
|
|
#### browser.disconnect()
|
|
|
|
Disconnects Puppeteer from the browser, but leaves the Chromium process running. After calling `disconnect`, the browser object is considered disposed and cannot be used anymore.
|
|
|
|
#### browser.newPage()
|
|
- returns: <[Promise]<[Page]>> Promise which resolves to a new [Page] object.
|
|
|
|
#### browser.pages()
|
|
- returns: <[Promise]<[Array]<[Page]>>> Promise which resolves to an array of all open pages.
|
|
|
|
#### browser.process()
|
|
- returns: <?[ChildProcess]> Spawned browser process. Returns `null` if the browser instance was created with `puppeteer.connect` method.
|
|
|
|
#### browser.targets()
|
|
- returns: <[Array]<[Target]>> An array of all active targets.
|
|
|
|
#### browser.userAgent()
|
|
- returns: <[Promise]<[string]>> Promise which resolves to the browser's original user agent.
|
|
|
|
> **NOTE** Pages can override browser user agent with [page.setUserAgent](#pagesetuseragentuseragent)
|
|
|
|
#### browser.version()
|
|
- returns: <[Promise]<[string]>> For headless Chromium, this is similar to `HeadlessChrome/61.0.3153.0`. For non-headless, this is similar to `Chrome/61.0.3153.0`.
|
|
|
|
> **NOTE** the format of browser.version() might change with future releases of Chromium.
|
|
|
|
#### browser.wsEndpoint()
|
|
- returns: <[string]> Browser websocket url.
|
|
|
|
Browser websocket endpoint which can be used as an argument to
|
|
[puppeteer.connect](#puppeteerconnectoptions). The format is `ws://${host}:${port}/devtools/browser/<id>`
|
|
|
|
You can find the `webSocketDebuggerUrl` from `http://${host}:${port}/json/version`. Learn more about the [devtools protocol](https://chromedevtools.github.io/devtools-protocol) and the [browser endpoint](https://chromedevtools.github.io/devtools-protocol/#how-do-i-access-the-browser-target).
|
|
|
|
### class: Page
|
|
|
|
* extends: [`EventEmitter`](https://nodejs.org/api/events.html#events_class_eventemitter)
|
|
|
|
Page provides methods to interact with a single tab in Chromium. One [Browser] instance might have multiple [Page] instances.
|
|
|
|
This example creates a page, navigates it to a URL, and then saves a screenshot:
|
|
```js
|
|
const puppeteer = require('puppeteer');
|
|
|
|
puppeteer.launch().then(async browser => {
|
|
const page = await browser.newPage();
|
|
await page.goto('https://example.com');
|
|
await page.screenshot({path: 'screenshot.png'});
|
|
await browser.close();
|
|
});
|
|
```
|
|
|
|
The Page class emits various events (described below) which can be handled using any of Node's native EventEmitter methods, such as `on` or `once`.
|
|
|
|
This example logs a message for a single page `load` event:
|
|
```js
|
|
page.once('load', () => console.log('Page loaded!'));
|
|
```
|
|
|
|
#### event: 'console'
|
|
- <[ConsoleMessage]>
|
|
|
|
Emitted when JavaScript within the page calls one of console API methods, e.g. `console.log` or `console.dir`. Also emitted if the page throws an error or a warning.
|
|
|
|
The arguments passed into `console.log` appear as arguments on the event handler.
|
|
|
|
An example of handling `console` event:
|
|
```js
|
|
page.on('console', msg => {
|
|
for (let i = 0; i < msg.args.length; ++i)
|
|
console.log(`${i}: ${msg.args[i]}`);
|
|
});
|
|
page.evaluate(() => console.log('hello', 5, {foo: 'bar'}));
|
|
```
|
|
|
|
#### event: 'dialog'
|
|
- <[Dialog]>
|
|
|
|
Emitted when a JavaScript dialog appears, such as `alert`, `prompt`, `confirm` or `beforeunload`. Puppeteer can respond to the dialog via [Dialog]'s [accept](#dialogacceptprompttext) or [dismiss](#dialogdismiss) methods.
|
|
|
|
#### event: 'error'
|
|
- <[Error]>
|
|
|
|
Emitted when the page crashes.
|
|
|
|
> **NOTE** `error` event has a special meaning in Node, see [error events](https://nodejs.org/api/events.html#events_error_events) for details.
|
|
|
|
#### event: 'frameattached'
|
|
- <[Frame]>
|
|
|
|
Emitted when a frame is attached.
|
|
|
|
#### event: 'framedetached'
|
|
- <[Frame]>
|
|
|
|
Emitted when a frame is detached.
|
|
|
|
#### event: 'framenavigated'
|
|
- <[Frame]>
|
|
|
|
Emitted when a frame is navigated to a new url.
|
|
|
|
#### event: 'load'
|
|
|
|
Emitted when the JavaScript [`load`](https://developer.mozilla.org/en-US/docs/Web/Events/load) event is dispatched.
|
|
|
|
#### event: 'metrics'
|
|
- <[Object]>
|
|
- `title` <[string]> The title passed to `console.timeStamp`.
|
|
- `metrics` <[Object]> Object containing metrics as key/value pairs. The values
|
|
of metrics are of <[number]> type.
|
|
|
|
Emitted when the JavaScript code makes a call to `console.timeStamp`. For the list
|
|
of metrics see `page.metrics`.
|
|
|
|
#### event: 'pageerror'
|
|
- <[string]> The exception message
|
|
|
|
Emitted when an uncaught exception happens within the page.
|
|
|
|
#### event: 'request'
|
|
- <[Request]>
|
|
|
|
Emitted when a page issues a request. The [request] object is read-only.
|
|
In order to intercept and mutate requests, see `page.setRequestInterception`.
|
|
|
|
#### event: 'requestfailed'
|
|
- <[Request]>
|
|
|
|
Emitted when a request fails, for example by timing out.
|
|
|
|
#### event: 'requestfinished'
|
|
- <[Request]>
|
|
|
|
Emitted when a request finishes successfully.
|
|
|
|
#### event: 'response'
|
|
- <[Response]>
|
|
|
|
Emitted when a [response] is received.
|
|
|
|
#### page.$(selector)
|
|
- `selector` <[string]> A [selector] to query page for
|
|
- returns: <[Promise]<?[ElementHandle]>>
|
|
|
|
The method runs `document.querySelector` within the page. If no element matches the selector, the return value resolve to `null`.
|
|
|
|
Shortcut for [page.mainFrame().$(selector)](#frameselector).
|
|
|
|
#### page.$$(selector)
|
|
- `selector` <[string]> A [selector] to query page for
|
|
- returns: <[Promise]<[Array]<[ElementHandle]>>>
|
|
|
|
The method runs `document.querySelectorAll` within the page. If no elements match the selector, the return value resolve to `[]`.
|
|
|
|
Shortcut for [page.mainFrame().$$(selector)](#frameselector-1).
|
|
|
|
|
|
#### page.$$eval(selector, pageFunction[, ...args])
|
|
- `selector` <[string]> A [selector] to query frame for
|
|
- `pageFunction` <[function]> Function to be evaluated in browser context
|
|
- `...args` <...[Serializable]|[JSHandle]> Arguments to pass to `pageFunction`
|
|
- returns: <[Promise]<[Serializable]>> Promise which resolves to the return value of `pageFunction`
|
|
|
|
This method runs `document.querySelectorAll` within the page and passes it as the first argument to `pageFunction`.
|
|
|
|
If `pageFunction` returns a [Promise], then `page.$$eval` would wait for the promise to resolve and return its value.
|
|
|
|
Examples:
|
|
```js
|
|
const divsCounts = await page.$$eval('div', divs => divs.length);
|
|
```
|
|
|
|
#### page.$eval(selector, pageFunction[, ...args])
|
|
- `selector` <[string]> A [selector] to query page for
|
|
- `pageFunction` <[function]> Function to be evaluated in browser context
|
|
- `...args` <...[Serializable]|[JSHandle]> Arguments to pass to `pageFunction`
|
|
- returns: <[Promise]<[Serializable]>> Promise which resolves to the return value of `pageFunction`
|
|
|
|
This method runs `document.querySelector` within the page and passes it as the first argument to `pageFunction`. If there's no element matching `selector`, the method throws an error.
|
|
|
|
If `pageFunction` returns a [Promise], then `page.$eval` would wait for the promise to resolve and return its value.
|
|
|
|
Examples:
|
|
```js
|
|
const searchValue = await page.$eval('#search', el => el.value);
|
|
const preloadHref = await page.$eval('link[rel=preload]', el => el.href);
|
|
const html = await page.$eval('.main-container', e => e.outerHTML);
|
|
```
|
|
|
|
Shortcut for [page.mainFrame().$eval(selector, pageFunction)](#frameevalselector-pagefunction-args).
|
|
|
|
#### page.$x(expression)
|
|
- `expression` <[string]> Expression to [evaluate](https://developer.mozilla.org/en-US/docs/Web/API/Document/evaluate).
|
|
- returns: <[Promise]<[Array]<[ElementHandle]>>>
|
|
|
|
The method evluates the XPath expression.
|
|
|
|
Shortcut for [page.mainFrame().$x(expression)](#frameexpression)
|
|
|
|
#### page.addScriptTag(options)
|
|
- `options` <[Object]>
|
|
- `url` <[string]> Url of a script to be added.
|
|
- `path` <[string]> Path to the JavaScript file to be injected into frame. If `path` is a relative path, then it is resolved relative to [current working directory](https://nodejs.org/api/process.html#process_process_cwd).
|
|
- `content` <[string]> Raw JavaScript content to be injected into frame.
|
|
- returns: <[Promise]<[ElementHandle]>> which resolves to the added tag when the script's onload fires or when the script content was injected into frame.
|
|
|
|
Adds a `<script>` tag into the page with the desired url or content.
|
|
|
|
Shortcut for [page.mainFrame().addScriptTag(options)](#frameaddscripttagoptions).
|
|
|
|
#### page.addStyleTag(options)
|
|
- `options` <[Object]>
|
|
- `url` <[string]> Url of the `<link>` tag.
|
|
- `path` <[string]> Path to the CSS file to be injected into frame. If `path` is a relative path, then it is resolved relative to [current working directory](https://nodejs.org/api/process.html#process_process_cwd).
|
|
- `content` <[string]> Raw CSS content to be injected into frame.
|
|
- returns: <[Promise]<[ElementHandle]>> which resolves to the added tag when the stylesheet's onload fires or when the CSS content was injected into frame.
|
|
|
|
Adds a `<link rel="stylesheet">` tag into the page with the desired url or a `<style type="text/css">` tag with the content.
|
|
|
|
Shortcut for [page.mainFrame().addStyleTag(options)](#frameaddstyletagoptions).
|
|
|
|
#### page.authenticate(credentials)
|
|
- `credentials` <?[Object]>
|
|
- `username` <[string]>
|
|
- `password` <[string]>
|
|
- returns: <[Promise]>
|
|
|
|
Provide credentials for [http authentication](https://developer.mozilla.org/en-US/docs/Web/HTTP/Authentication).
|
|
|
|
To disable authentication, pass `null`.
|
|
|
|
#### page.bringToFront()
|
|
|
|
- returns: <[Promise]>
|
|
|
|
Brings page to front (activates tab).
|
|
|
|
#### page.click(selector[, options])
|
|
- `selector` <[string]> A [selector] to search for element to click. If there are multiple elements satisfying the selector, the first will be clicked.
|
|
- `options` <[Object]>
|
|
- `button` <[string]> `left`, `right`, or `middle`, defaults to `left`.
|
|
- `clickCount` <[number]> defaults to 1. See [UIEvent.detail].
|
|
- `delay` <[number]> Time to wait between `mousedown` and `mouseup` in milliseconds. Defaults to 0.
|
|
- returns: <[Promise]> Promise which resolves when the element matching `selector` is successfully clicked. The Promise will be rejected if there is no element matching `selector`.
|
|
|
|
This method fetches an element with `selector`, scrolls it into view if needed, and then uses [page.mouse](#pagemouse) to click in the center of the element.
|
|
If there's no element matching `selector`, the method throws an error.
|
|
|
|
#### page.close()
|
|
- returns: <[Promise]>
|
|
|
|
#### page.content()
|
|
- returns: <[Promise]<[String]>>
|
|
|
|
Gets the full HTML contents of the page, including the doctype.
|
|
|
|
#### page.cookies(...urls)
|
|
- `...urls` <...[string]>
|
|
- returns: <[Promise]<[Array]<[Object]>>>
|
|
- `name` <[string]>
|
|
- `value` <[string]>
|
|
- `domain` <[string]>
|
|
- `path` <[string]>
|
|
- `expires` <[number]> Unix time in seconds.
|
|
- `httpOnly` <[boolean]>
|
|
- `secure` <[boolean]>
|
|
- `session` <[boolean]>
|
|
- `sameSite` <[string]> `"Strict"` or `"Lax"`.
|
|
|
|
If no URLs are specified, this method returns cookies for the current page URL.
|
|
If URLs are specified, only cookies for those URLs are returned.
|
|
|
|
#### page.coverage
|
|
|
|
- returns: <[Coverage]>
|
|
|
|
#### page.deleteCookie(...cookies)
|
|
- `...cookies` <...[Object]>
|
|
- `name` <[string]> **required**
|
|
- `url` <[string]>
|
|
- `domain` <[string]>
|
|
- `path` <[string]>
|
|
- `secure` <[boolean]>
|
|
- returns: <[Promise]>
|
|
|
|
#### page.emulate(options)
|
|
- `options` <[Object]>
|
|
- `viewport` <[Object]>
|
|
- `width` <[number]> page width in pixels.
|
|
- `height` <[number]> page height in pixels.
|
|
- `deviceScaleFactor` <[number]> Specify device scale factor (can be thought of as dpr). Defaults to `1`.
|
|
- `isMobile` <[boolean]> Whether the `meta viewport` tag is taken into account. Defaults to `false`.
|
|
- `hasTouch`<[boolean]> Specifies if viewport supports touch events. Defaults to `false`
|
|
- `isLandscape` <[boolean]> Specifies if viewport is in landscape mode. Defaults to `false`.
|
|
- `userAgent` <[string]>
|
|
- returns: <[Promise]>
|
|
|
|
Emulates given device metrics and user agent. This method is a shortcut for calling two methods:
|
|
- [page.setUserAgent(userAgent)](#pagesetuseragentuseragent)
|
|
- [page.setViewport(viewport)](#pagesetviewportviewport)
|
|
|
|
To aid emulation, puppeteer provides a list of device descriptors which can be obtained via the `require('puppeteer/DeviceDescriptors')` command.
|
|
Below is an example of emulating an iPhone 6 in puppeteer:
|
|
```js
|
|
const puppeteer = require('puppeteer');
|
|
const devices = require('puppeteer/DeviceDescriptors');
|
|
const iPhone = devices['iPhone 6'];
|
|
|
|
puppeteer.launch().then(async browser => {
|
|
const page = await browser.newPage();
|
|
await page.emulate(iPhone);
|
|
await page.goto('https://www.google.com');
|
|
// other actions...
|
|
await browser.close();
|
|
});
|
|
```
|
|
|
|
List of all available devices is available in the source code: [DeviceDescriptors.js](https://github.com/GoogleChrome/puppeteer/blob/master/DeviceDescriptors.js).
|
|
|
|
#### page.emulateMedia(mediaType)
|
|
- `mediaType` <?[string]> Changes the CSS media type of the page. The only allowed values are `'screen'`, `'print'` and `null`. Passing `null` disables media emulation.
|
|
- returns: <[Promise]>
|
|
|
|
#### page.evaluate(pageFunction, ...args)
|
|
- `pageFunction` <[function]|[string]> Function to be evaluated in the page context
|
|
- `...args` <...[Serializable]|[JSHandle]> Arguments to pass to `pageFunction`
|
|
- returns: <[Promise]<[Serializable]>> Resolves to the return value of `pageFunction`
|
|
|
|
If the function, passed to the `page.evaluate`, returns a [Promise], then `page.evaluate` would wait for the promise to resolve and return its value.
|
|
|
|
If the function passed into `page.evaluate` returns a non-[Serializable] value, then `page.evaluate` resolves to `undefined`.
|
|
Passing arguments to ```pageFunction```.
|
|
|
|
```js
|
|
const result = await page.evaluate(x => {
|
|
return Promise.resolve(8 * x);
|
|
}, 7);
|
|
console.log(result); // prints "56"
|
|
```
|
|
|
|
A string can also be passed in instead of a function.
|
|
|
|
```js
|
|
console.log(await page.evaluate('1 + 2')); // prints "3"
|
|
const x = 10;
|
|
console.log(await page.evaluate(`1 + ${x}`)); // prints "11"
|
|
```
|
|
|
|
[ElementHandle] instances can be passed as arguments to the `page.evaluate`:
|
|
```js
|
|
const bodyHandle = await page.$('body');
|
|
const html = await page.evaluate(body => body.innerHTML, bodyHandle);
|
|
await bodyHandle.dispose();
|
|
```
|
|
|
|
Shortcut for [page.mainFrame().evaluate(pageFunction, ...args)](#frameevaluatepagefunction-args).
|
|
|
|
#### page.evaluateHandle(pageFunction, ...args)
|
|
- `pageFunction` <[function]|[string]> Function to be evaluated in the page context
|
|
- `...args` <...[Serializable]|[JSHandle]> Arguments to pass to `pageFunction`
|
|
- returns: <[Promise]<[JSHandle]>> Resolves to the return value of `pageFunction`
|
|
|
|
If the function, passed to the `page.evaluateHandle`, returns a [Promise], then `page.evaluateHandle` would wait for the promise to resolve and return its value.
|
|
|
|
```js
|
|
const aWindowHandle = await page.evaluateHandle(() => Promise.resolve(window));
|
|
aWindowHandle; // Handle for the window object.
|
|
```
|
|
|
|
A string can also be passed in instead of a function.
|
|
|
|
```js
|
|
const aHandle = await page.evaluateHandle('document'); // Handle for the 'document'.
|
|
```
|
|
|
|
[JSHandle] instances can be passed as arguments to the `page.evaluateHandle`:
|
|
```js
|
|
const aHandle = await page.evaluateHandle(() => document.body);
|
|
const resultHandle = await page.evaluateHandle(body => body.innerHTML, aHandle);
|
|
console.log(await resultHandle.jsonValue());
|
|
await resultHandle.dispose();
|
|
```
|
|
|
|
Shortcut for [page.mainFrame().executionContext().evaluateHandle(pageFunction, ...args)](#executioncontextevaluatehandlepagefunction-args).
|
|
|
|
|
|
#### page.evaluateOnNewDocument(pageFunction, ...args)
|
|
- `pageFunction` <[function]|[string]> Function to be evaluated in browser context
|
|
- `...args` <...[Serializable]> Arguments to pass to `pageFunction`
|
|
- returns: <[Promise]>
|
|
|
|
Adds a function which would be invoked in one of the following scenarios:
|
|
- whenever the page is navigated
|
|
- whenever the child frame is attached or navigated. In this case, the function is invoked in the context of the newly attached frame
|
|
|
|
The function is invoked after the document was created but before any of its scripts were run. This is useful to amend JavaScript environment, e.g. to seed `Math.random`.
|
|
|
|
An example of overriding the navigator.languages property before the page loads:
|
|
|
|
```js
|
|
// preload.js
|
|
|
|
// overwrite the `languages` property to use a custom getter
|
|
Object.defineProperty(navigator, "languages", {
|
|
get: function() {
|
|
return ["en-US", "en", "bn"];
|
|
};
|
|
});
|
|
|
|
// In your puppeteer script, assuming the preload.js file is in same folder of our script
|
|
const preloadFile = fs.readFileSync('./preload.js', 'utf8');
|
|
await page.evaluateOnNewDocument(preloadFile);
|
|
```
|
|
|
|
#### page.exposeFunction(name, puppeteerFunction)
|
|
- `name` <[string]> Name of the function on the window object
|
|
- `puppeteerFunction` <[function]> Callback function which will be called in Puppeteer's context.
|
|
- returns: <[Promise]>
|
|
|
|
The method adds a function called `name` on the page's `window` object.
|
|
When called, the function executes `puppeteerFunction` in node.js and returns a [Promise] which resolves to the return value of `puppeteerFunction`.
|
|
|
|
If the `puppeteerFunction` returns a [Promise], it will be awaited.
|
|
|
|
> **NOTE** Functions installed via `page.exposeFunction` survive navigations.
|
|
|
|
An example of adding an `md5` function into the page:
|
|
```js
|
|
const puppeteer = require('puppeteer');
|
|
const crypto = require('crypto');
|
|
|
|
puppeteer.launch().then(async browser => {
|
|
const page = await browser.newPage();
|
|
page.on('console', msg => console.log(msg.text));
|
|
await page.exposeFunction('md5', text =>
|
|
crypto.createHash('md5').update(text).digest('hex')
|
|
);
|
|
await page.evaluate(async () => {
|
|
// use window.md5 to compute hashes
|
|
const myString = 'PUPPETEER';
|
|
const myHash = await window.md5(myString);
|
|
console.log(`md5 of ${myString} is ${myHash}`);
|
|
});
|
|
await browser.close();
|
|
});
|
|
```
|
|
|
|
An example of adding a `window.readfile` function into the page:
|
|
|
|
```js
|
|
const puppeteer = require('puppeteer');
|
|
const fs = require('fs');
|
|
|
|
puppeteer.launch().then(async browser => {
|
|
const page = await browser.newPage();
|
|
page.on('console', msg => console.log(msg.text));
|
|
await page.exposeFunction('readfile', async filePath => {
|
|
return new Promise((resolve, reject) => {
|
|
fs.readFile(filePath, 'utf8', (err, text) => {
|
|
if (err)
|
|
reject(err);
|
|
else
|
|
resolve(text);
|
|
});
|
|
});
|
|
});
|
|
await page.evaluate(async () => {
|
|
// use window.readfile to read contents of a file
|
|
const content = await window.readfile('/etc/hosts');
|
|
console.log(content);
|
|
});
|
|
await browser.close();
|
|
});
|
|
|
|
```
|
|
|
|
#### page.focus(selector)
|
|
- `selector` <[string]> A [selector] of an element to focus. If there are multiple elements satisfying the selector, the first will be focused.
|
|
- returns: <[Promise]> Promise which resolves when the element matching `selector` is successfully focused. The promise will be rejected if there is no element matching `selector`.
|
|
|
|
This method fetches an element with `selector` and focuses it.
|
|
If there's no element matching `selector`, the method throws an error.
|
|
|
|
#### page.frames()
|
|
- returns: <[Array]<[Frame]>> An array of all frames attached to the page.
|
|
|
|
#### page.goBack(options)
|
|
- `options` <[Object]> Navigation parameters which might have the following properties:
|
|
- `timeout` <[number]> Maximum navigation time in milliseconds, defaults to 30 seconds, pass `0` to disable timeout. The default value can be changed by using the [page.setDefaultNavigationTimeout(timeout)](#pagesetdefaultnavigationtimeouttimeout) method.
|
|
- `waitUntil` <[string]|[Array]<[string]>> When to consider navigation succeeded, defaults to `load`. Given an array of event strings, navigation is considered to be successful after all events have been fired. Events can be either:
|
|
- `load` - consider navigation to be finished when the `load` event is fired.
|
|
- `domcontentloaded` - consider navigation to be finished when the `DOMContentLoaded` event is fired.
|
|
- `networkidle0` - consider navigation to be finished when there are no more than 0 network connections for at least `500` ms.
|
|
- `networkidle2` - consider navigation to be finished when there are no more than 2 network connections for at least `500` ms.
|
|
- returns: <[Promise]<?[Response]>> Promise which resolves to the main resource response. In case of multiple redirects, the navigation will resolve with the response of the last redirect. If
|
|
can not go back, resolves to `null`.
|
|
|
|
Navigate to the previous page in history.
|
|
|
|
#### page.goForward(options)
|
|
- `options` <[Object]> Navigation parameters which might have the following properties:
|
|
- `timeout` <[number]> Maximum navigation time in milliseconds, defaults to 30 seconds, pass `0` to disable timeout. The default value can be changed by using the [page.setDefaultNavigationTimeout(timeout)](#pagesetdefaultnavigationtimeouttimeout) method.
|
|
- `waitUntil` <[string]|[Array]<[string]>> When to consider navigation succeeded, defaults to `load`. Given an array of event strings, navigation is considered to be successful after all events have been fired. Events can be either:
|
|
- `load` - consider navigation to be finished when the `load` event is fired.
|
|
- `domcontentloaded` - consider navigation to be finished when the `DOMContentLoaded` event is fired.
|
|
- `networkidle0` - consider navigation to be finished when there are no more than 0 network connections for at least `500` ms.
|
|
- `networkidle2` - consider navigation to be finished when there are no more than 2 network connections for at least `500` ms.
|
|
- returns: <[Promise]<?[Response]>> Promise which resolves to the main resource response. In case of multiple redirects, the navigation will resolve with the response of the last redirect. If
|
|
can not go back, resolves to `null`.
|
|
|
|
Navigate to the next page in history.
|
|
|
|
#### page.goto(url, options)
|
|
- `url` <[string]> URL to navigate page to. The url should include scheme, e.g. `https://`.
|
|
- `options` <[Object]> Navigation parameters which might have the following properties:
|
|
- `timeout` <[number]> Maximum navigation time in milliseconds, defaults to 30 seconds, pass `0` to disable timeout. The default value can be changed by using the [page.setDefaultNavigationTimeout(timeout)](#pagesetdefaultnavigationtimeouttimeout) method.
|
|
- `waitUntil` <[string]|[Array]<[string]>> When to consider navigation succeeded, defaults to `load`. Given an array of event strings, navigation is considered to be successful after all events have been fired. Events can be either:
|
|
- `load` - consider navigation to be finished when the `load` event is fired.
|
|
- `domcontentloaded` - consider navigation to be finished when the `DOMContentLoaded` event is fired.
|
|
- `networkidle0` - consider navigation to be finished when there are no more than 0 network connections for at least `500` ms.
|
|
- `networkidle2` - consider navigation to be finished when there are no more than 2 network connections for at least `500` ms.
|
|
- returns: <[Promise]<?[Response]>> Promise which resolves to the main resource response. In case of multiple redirects, the navigation will resolve with the response of the last redirect.
|
|
|
|
The `page.goto` will throw an error if:
|
|
- there's an SSL error (e.g. in case of self-signed certificates).
|
|
- target URL is invalid.
|
|
- the `timeout` is exceeded during navigation.
|
|
- the main resource failed to load.
|
|
|
|
> **NOTE** `page.goto` either throw or return a main resource response. The only exception is navigation to `about:blank`, which would succeed and return `null`.
|
|
|
|
> **NOTE** Headless mode doesn't support navigating to a PDF document. See the [upstream issue](https://bugs.chromium.org/p/chromium/issues/detail?id=761295).
|
|
|
|
#### page.hover(selector)
|
|
- `selector` <[string]> A [selector] to search for element to hover. If there are multiple elements satisfying the selector, the first will be hovered.
|
|
- returns: <[Promise]> Promise which resolves when the element matching `selector` is successfully hovered. Promise gets rejected if there's no element matching `selector`.
|
|
|
|
This method fetches an element with `selector`, scrolls it into view if needed, and then uses [page.mouse](#pagemouse) to hover over the center of the element.
|
|
If there's no element matching `selector`, the method throws an error.
|
|
|
|
#### page.keyboard
|
|
|
|
- returns: <[Keyboard]>
|
|
|
|
#### page.mainFrame()
|
|
- returns: <[Frame]> returns page's main frame.
|
|
|
|
Page is guaranteed to have a main frame which persists during navigations.
|
|
|
|
#### page.metrics()
|
|
- returns: <[Promise]<[Object]>> Object containing metrics as key/value pairs.
|
|
- `Timestamp` <[number]> The timestamp when the metrics sample was taken.
|
|
- `Documents` <[number]> Number of documents in the page.
|
|
- `Frames` <[number]> Number of frames in the page.
|
|
- `JSEventListeners` <[number]> Number of events in the page.
|
|
- `Nodes` <[number]> Number of DOM nodes in the page.
|
|
- `LayoutCount` <[number]> Total number of full or partial page layout.
|
|
- `RecalcStyleCount` <[number]> Total number of page style recalculations.
|
|
- `LayoutDuration` <[number]> Combined durations of all page layouts.
|
|
- `RecalcStyleDuration` <[number]> Combined duration of all page style recalculations.
|
|
- `ScriptDuration` <[number]> Combined duration of JavaScript execution.
|
|
- `TaskDuration` <[number]> Combined duration of all tasks performed by the browser.
|
|
- `JSHeapUsedSize` <[number]> Used JavaScript heap size.
|
|
- `JSHeapTotalSize` <[number]> Total JavaScript heap size.
|
|
|
|
> **NOTE** All timestamps are in monotonic time: monotonically increasing time in seconds since an arbitrary point in the past.
|
|
|
|
#### page.mouse
|
|
|
|
- returns: <[Mouse]>
|
|
|
|
#### page.pdf(options)
|
|
- `options` <[Object]> Options object which might have the following properties:
|
|
- `path` <[string]> The file path to save the PDF to. If `path` is a relative path, then it is resolved relative to [current working directory](https://nodejs.org/api/process.html#process_process_cwd). If no path is provided, the PDF won't be saved to the disk.
|
|
- `scale` <[number]> Scale of the webpage rendering. Defaults to `1`.
|
|
- `displayHeaderFooter` <[boolean]> Display header and footer. Defaults to `false`.
|
|
- `headerTemplate` <[string]> HTML template for the print header. Should be valid HTML markup with following classes used to inject printing values into them:
|
|
- `date` formatted print date
|
|
- `title` document title
|
|
- `url` document location
|
|
- `pageNumber` current page number
|
|
- `totalPages` total pages in the document
|
|
- `footerTemplate` <[string]> HTML template for the print footer. Should use the same format as the `headerTemplate`.
|
|
- `printBackground` <[boolean]> Print background graphics. Defaults to `false`.
|
|
- `landscape` <[boolean]> Paper orientation. Defaults to `false`.
|
|
- `pageRanges` <[string]> Paper ranges to print, e.g., '1-5, 8, 11-13'. Defaults to the empty string, which means print all pages.
|
|
- `format` <[string]> Paper format. If set, takes priority over `width` or `height` options. Defaults to 'Letter'.
|
|
- `width` <[string]> Paper width, accepts values labeled with units.
|
|
- `height` <[string]> Paper height, accepts values labeled with units.
|
|
- `margin` <[Object]> Paper margins, defaults to none.
|
|
- `top` <[string]> Top margin, accepts values labeled with units.
|
|
- `right` <[string]> Right margin, accepts values labeled with units.
|
|
- `bottom` <[string]> Bottom margin, accepts values labeled with units.
|
|
- `left` <[string]> Left margin, accepts values labeled with units.
|
|
- returns: <[Promise]<[Buffer]>> Promise which resolves with PDF buffer.
|
|
|
|
> **NOTE** Generating a pdf is currently only supported in Chrome headless.
|
|
|
|
`page.pdf()` generates a pdf of the page with `print` css media. To generate a pdf with `screen` media, call [page.emulateMedia('screen')](#pageemulatemediamediatype) before calling `page.pdf()`:
|
|
|
|
```js
|
|
// Generates a PDF with 'screen' media type.
|
|
await page.emulateMedia('screen');
|
|
await page.pdf({path: 'page.pdf'});
|
|
```
|
|
|
|
The `width`, `height`, and `margin` options accept values labeled with units. Unlabeled values are treated as pixels.
|
|
|
|
A few examples:
|
|
- `page.pdf({width: 100})` - prints with width set to 100 pixels
|
|
- `page.pdf({width: '100px'})` - prints with width set to 100 pixels
|
|
- `page.pdf({width: '10cm'})` - prints with width set to 10 centimeters.
|
|
|
|
All possible units are:
|
|
- `px` - pixel
|
|
- `in` - inch
|
|
- `cm` - centimeter
|
|
- `mm` - millimeter
|
|
|
|
The `format` options are:
|
|
- `Letter`: 8.5in x 11in
|
|
- `Legal`: 8.5in x 14in
|
|
- `Tabloid`: 11in x 17in
|
|
- `Ledger`: 17in x 11in
|
|
- `A0`: 33.1in x 46.8in
|
|
- `A1`: 23.4in x 33.1in
|
|
- `A2`: 16.5in x 23.4in
|
|
- `A3`: 11.7in x 16.5in
|
|
- `A4`: 8.27in x 11.7in
|
|
- `A5`: 5.83in x 8.27in
|
|
- `A6`: 4.13in x 5.83in
|
|
|
|
#### page.queryObjects(prototypeHandle)
|
|
- `prototypeHandle` <[JSHandle]> A handle to the object prototype.
|
|
- returns: <[Promise]<[JSHandle]>> Promise which resolves to a handle to an array of objects with this prototype.
|
|
|
|
The method iterates JavaScript heap and finds all the objects with the given prototype.
|
|
|
|
```js
|
|
// Create a Map object
|
|
await page.evaluate(() => window.map = new Map());
|
|
// Get a handle to the Map object prototype
|
|
const mapPrototype = await page.evaluateHandle(() => Map.prototype);
|
|
// Query all map instances into an array
|
|
const mapInstances = await page.queryObjects(mapPrototype);
|
|
// Count amount of map objects in heap
|
|
const count = await page.evaluate(maps => maps.length, mapInstances);
|
|
await mapInstances.dispose();
|
|
await mapPrototype.dispose();
|
|
```
|
|
|
|
Shortcut for [page.mainFrame().executionContext().queryObjects(prototypeHandle)](#executioncontextqueryobjectsprototypehandle).
|
|
|
|
#### page.reload(options)
|
|
- `options` <[Object]> Navigation parameters which might have the following properties:
|
|
- `timeout` <[number]> Maximum navigation time in milliseconds, defaults to 30 seconds, pass `0` to disable timeout. The default value can be changed by using the [page.setDefaultNavigationTimeout(timeout)](#pagesetdefaultnavigationtimeouttimeout) method.
|
|
- `waitUntil` <[string]|[Array]<[string]>> When to consider navigation succeeded, defaults to `load`. Given an array of event strings, navigation is considered to be successful after all events have been fired. Events can be either:
|
|
- `load` - consider navigation to be finished when the `load` event is fired.
|
|
- `domcontentloaded` - consider navigation to be finished when the `DOMContentLoaded` event is fired.
|
|
- `networkidle0` - consider navigation to be finished when there are no more than 0 network connections for at least `500` ms.
|
|
- `networkidle2` - consider navigation to be finished when there are no more than 2 network connections for at least `500` ms.
|
|
- returns: <[Promise]<[Response]>> Promise which resolves to the main resource response. In case of multiple redirects, the navigation will resolve with the response of the last redirect.
|
|
|
|
#### page.screenshot([options])
|
|
- `options` <[Object]> Options object which might have the following properties:
|
|
- `path` <[string]> The file path to save the image to. The screenshot type will be inferred from file extension. If `path` is a relative path, then it is resolved relative to [current working directory](https://nodejs.org/api/process.html#process_process_cwd). If no path is provided, the image won't be saved to the disk.
|
|
- `type` <[string]> Specify screenshot type, can be either `jpeg` or `png`. Defaults to 'png'.
|
|
- `quality` <[number]> The quality of the image, between 0-100. Not applicable to `png` images.
|
|
- `fullPage` <[boolean]> When true, takes a screenshot of the full scrollable page. Defaults to `false`.
|
|
- `clip` <[Object]> An object which specifies clipping region of the page. Should have the following fields:
|
|
- `x` <[number]> x-coordinate of top-left corner of clip area
|
|
- `y` <[number]> y-coordinate of top-left corner of clip area
|
|
- `width` <[number]> width of clipping area
|
|
- `height` <[number]> height of clipping area
|
|
- `omitBackground` <[boolean]> Hides default white background and allows capturing screenshots with transparency. Defaults to `false`.
|
|
- returns: <[Promise]<[Buffer]>> Promise which resolves to buffer with captured screenshot
|
|
|
|
#### page.select(selector, ...values)
|
|
- `selector` <[string]> A [selector] to query page for
|
|
- `...values` <...[string]> Values of options to select. If the `<select>` has the `multiple` attribute, all values are considered, otherwise only the first one is taken into account.
|
|
- returns: <[Promise]<[Array]<[string]>>> Returns an array of option values that have been successfully selected.
|
|
|
|
Triggers a `change` and `input` event once all the provided options have been selected.
|
|
If there's no `<select>` element matching `selector`, the method throws an error.
|
|
|
|
```js
|
|
page.select('select#colors', 'blue'); // single selection
|
|
page.select('select#colors', 'red', 'green', 'blue'); // multiple selections
|
|
```
|
|
|
|
Shortcut for [page.mainFrame().select()](#frameselectselector-values)
|
|
|
|
#### page.setContent(html)
|
|
- `html` <[string]> HTML markup to assign to the page.
|
|
- returns: <[Promise]>
|
|
|
|
#### page.setCookie(...cookies)
|
|
- `...cookies` <...[Object]>
|
|
- `name` <[string]> **required**
|
|
- `value` <[string]> **required**
|
|
- `url` <[string]>
|
|
- `domain` <[string]>
|
|
- `path` <[string]>
|
|
- `expires` <[number]> Unix time in seconds.
|
|
- `httpOnly` <[boolean]>
|
|
- `secure` <[boolean]>
|
|
- `sameSite` <[string]> `"Strict"` or `"Lax"`.
|
|
- returns: <[Promise]>
|
|
|
|
#### page.setDefaultNavigationTimeout(timeout)
|
|
- `timeout` <[number]> Maximum navigation time in milliseconds
|
|
|
|
This setting will change the default maximum navigation time of 30 seconds for the following methods:
|
|
- [page.goto(url, options)](#pagegotourl-options)
|
|
- [page.goBack(options)](#pagegobackoptions)
|
|
- [page.goForward(options)](#pagegoforwardoptions)
|
|
- [page.reload(options)](#pagereloadoptions)
|
|
- [page.waitForNavigation(options)](#pagewaitfornavigationoptions)
|
|
|
|
#### page.setExtraHTTPHeaders(headers)
|
|
- `headers` <[Object]> An object containing additional http headers to be sent with every request. All header values must be strings.
|
|
- returns: <[Promise]>
|
|
|
|
The extra HTTP headers will be sent with every request the page initiates.
|
|
|
|
> **NOTE** page.setExtraHTTPHeaders does not guarantee the order of headers in the outgoing requests.
|
|
|
|
#### page.setJavaScriptEnabled(enabled)
|
|
- `enabled` <[boolean]> Whether or not to enable JavaScript on the page.
|
|
- returns: <[Promise]>
|
|
|
|
> **NOTE** changing this value won't affect scripts that have already been run. It will take full effect on the next [navigation](#pagegotourl-options).
|
|
|
|
#### page.setOfflineMode(enabled)
|
|
- `enabled` <[boolean]> When `true`, enables offline mode for the page.
|
|
- returns: <[Promise]>
|
|
|
|
#### page.setRequestInterception(value)
|
|
- `value` <[boolean]> Whether to enable request interception.
|
|
- returns: <[Promise]>
|
|
|
|
Activating request interception enables `request.abort`, `request.continue` and
|
|
`request.respond` methods.
|
|
|
|
An example of a naïve request interceptor that aborts all image requests:
|
|
```js
|
|
const puppeteer = require('puppeteer');
|
|
|
|
puppeteer.launch().then(async browser => {
|
|
const page = await browser.newPage();
|
|
await page.setRequestInterception(true);
|
|
page.on('request', interceptedRequest => {
|
|
if (interceptedRequest.url.endsWith('.png') || interceptedRequest.url.endsWith('.jpg'))
|
|
interceptedRequest.abort();
|
|
else
|
|
interceptedRequest.continue();
|
|
});
|
|
await page.goto('https://example.com');
|
|
await browser.close();
|
|
});
|
|
```
|
|
|
|
> **NOTE** Enabling request interception disables page caching.
|
|
|
|
#### page.setUserAgent(userAgent)
|
|
- `userAgent` <[string]> Specific user agent to use in this page
|
|
- returns: <[Promise]> Promise which resolves when the user agent is set.
|
|
|
|
#### page.setViewport(viewport)
|
|
- `viewport` <[Object]>
|
|
- `width` <[number]> page width in pixels.
|
|
- `height` <[number]> page height in pixels.
|
|
- `deviceScaleFactor` <[number]> Specify device scale factor (can be thought of as dpr). Defaults to `1`.
|
|
- `isMobile` <[boolean]> Whether the `meta viewport` tag is taken into account. Defaults to `false`.
|
|
- `hasTouch`<[boolean]> Specifies if viewport supports touch events. Defaults to `false`
|
|
- `isLandscape` <[boolean]> Specifies if viewport is in landscape mode. Defaults to `false`.
|
|
- returns: <[Promise]>
|
|
|
|
> **NOTE** in certain cases, setting viewport will reload the page in order to set the `isMobile` or `hasTouch` properties.
|
|
|
|
In the case of multiple pages in a single browser, each page can have its own viewport size.
|
|
|
|
#### page.tap(selector)
|
|
- `selector` <[string]> A [selector] to search for element to tap. If there are multiple elements satisfying the selector, the first will be tapped.
|
|
- returns: <[Promise]>
|
|
|
|
This method fetches an element with `selector`, scrolls it into view if needed, and then uses [page.touchscreen](#pagetouchscreen) to tap in the center of the element.
|
|
If there's no element matching `selector`, the method throws an error.
|
|
|
|
#### page.target()
|
|
- returns: <[Target]> a target this page was created from.
|
|
|
|
#### page.title()
|
|
- returns: <[Promise]<[string]>> Returns page's title.
|
|
|
|
Shortcut for [page.mainFrame().title()](#frametitle).
|
|
|
|
#### page.touchscreen
|
|
- returns: <[Touchscreen]>
|
|
|
|
#### page.tracing
|
|
- returns: <[Tracing]>
|
|
|
|
#### page.type(selector, text[, options])
|
|
- `selector` <[string]> A [selector] of an element to type into. If there are multiple elements satisfying the selector, the first will be used.
|
|
- `text` <[string]> A text to type into a focused element.
|
|
- `options` <[Object]>
|
|
- `delay` <[number]> Time to wait between key presses in milliseconds. Defaults to 0.
|
|
- returns: <[Promise]>
|
|
|
|
Sends a `keydown`, `keypress`/`input`, and `keyup` event for each character in the text.
|
|
|
|
To press a special key, like `Control` or `ArrowDown`, use [`keyboard.press`](#keyboardpresskey-options).
|
|
|
|
```js
|
|
page.type('#mytextarea', 'Hello'); // Types instantly
|
|
page.type('#mytextarea', 'World', {delay: 100}); // Types slower, like a user
|
|
```
|
|
|
|
#### page.url()
|
|
- returns: <[string]>
|
|
|
|
This is a shortcut for [page.mainFrame().url()](#frameurl)
|
|
|
|
#### page.viewport()
|
|
- returns: <[Object]>
|
|
- `width` <[number]> page width in pixels.
|
|
- `height` <[number]> page height in pixels.
|
|
- `deviceScaleFactor` <[number]> Specify device scale factor (can be though of as dpr). Defaults to `1`.
|
|
- `isMobile` <[boolean]> Whether the `meta viewport` tag is taken into account. Defaults to `false`.
|
|
- `hasTouch`<[boolean]> Specifies if viewport supports touch events. Defaults to `false`
|
|
- `isLandscape` <[boolean]> Specifies if viewport is in landscape mode. Defaults to `false`.
|
|
|
|
#### page.waitFor(selectorOrFunctionOrTimeout[, options[, ...args]])
|
|
- `selectorOrFunctionOrTimeout` <[string]|[number]|[function]> A [selector], predicate or timeout to wait for
|
|
- `options` <[Object]> Optional waiting parameters
|
|
- `...args` <...[Serializable]|[JSHandle]> Arguments to pass to `pageFunction`
|
|
- returns: <[Promise]<[JSHandle]>> Promise which resolves to a JSHandle of the success value
|
|
|
|
This method behaves differently with respect to the type of the first parameter:
|
|
- if `selectorOrFunctionOrTimeout` is a `string`, then the first argument is treated as a [selector] to wait for and the method is a shortcut for [page.waitForSelector](#pagewaitforselectorselector-options)
|
|
- if `selectorOrFunctionOrTimeout` is a `function`, then the first argument is treated as a predicate to wait for and the method is a shortcut for [page.waitForFunction()](#pagewaitforfunctionpagefunction-options-args).
|
|
- if `selectorOrFunctionOrTimeout` is a `number`, then the first argument is treated as a timeout in milliseconds and the method returns a promise which resolves after the timeout
|
|
- otherwise, an exception is thrown
|
|
|
|
Shortcut for [page.mainFrame().waitFor(selectorOrFunctionOrTimeout[, options[, ...args]])](#framewaitforselectororfunctionortimeout-options-args).
|
|
|
|
#### page.waitForFunction(pageFunction[, options[, ...args]])
|
|
- `pageFunction` <[function]|[string]> Function to be evaluated in browser context
|
|
- `options` <[Object]> Optional waiting parameters
|
|
- `polling` <[string]|[number]> An interval at which the `pageFunction` is executed, defaults to `raf`. If `polling` is a number, then it is treated as an interval in milliseconds at which the function would be executed. If `polling` is a string, then it can be one of the following values:
|
|
- `raf` - to constantly execute `pageFunction` in `requestAnimationFrame` callback. This is the tightest polling mode which is suitable to observe styling changes.
|
|
- `mutation` - to execute `pageFunction` on every DOM mutation.
|
|
- `timeout` <[number]> maximum time to wait for in milliseconds. Defaults to `30000` (30 seconds).
|
|
- `...args` <...[Serializable]|[JSHandle]> Arguments to pass to `pageFunction`
|
|
- returns: <[Promise]<[JSHandle]>> Promise which resolves when the `pageFunction` returns a truthy value. It resolves to a JSHandle of the truthy value.
|
|
|
|
The `waitForFunction` can be used to observe viewport size change:
|
|
```js
|
|
const puppeteer = require('puppeteer');
|
|
|
|
puppeteer.launch().then(async browser => {
|
|
const page = await browser.newPage();
|
|
const watchDog = page.waitForFunction('window.innerWidth < 100');
|
|
page.setViewport({width: 50, height: 50});
|
|
await watchDog;
|
|
await browser.close();
|
|
});
|
|
```
|
|
Shortcut for [page.mainFrame().waitForFunction(pageFunction[, options[, ...args]])](#framewaitforfunctionpagefunction-options-args).
|
|
|
|
#### page.waitForNavigation(options)
|
|
- `options` <[Object]> Navigation parameters which might have the following properties:
|
|
- `timeout` <[number]> Maximum navigation time in milliseconds, defaults to 30 seconds, pass `0` to disable timeout. The default value can be changed by using the [page.setDefaultNavigationTimeout(timeout)](#pagesetdefaultnavigationtimeouttimeout) method.
|
|
- `waitUntil` <[string]|[Array]<[string]>> When to consider navigation succeeded, defaults to `load`. Given an array of event strings, navigation is considered to be successful after all events have been fired. Events can be either:
|
|
- `load` - consider navigation to be finished when the `load` event is fired.
|
|
- `domcontentloaded` - consider navigation to be finished when the `DOMContentLoaded` event is fired.
|
|
- `networkidle0` - consider navigation to be finished when there are no more than 0 network connections for at least `500` ms.
|
|
- `networkidle2` - consider navigation to be finished when there are no more than 2 network connections for at least `500` ms.
|
|
- returns: <[Promise]<[Response]>> Promise which resolves to the main resource response. In case of multiple redirects, the navigation will resolve with the response of the last redirect.
|
|
|
|
#### page.waitForSelector(selector[, options])
|
|
- `selector` <[string]> A [selector] of an element to wait for,
|
|
- `options` <[Object]> Optional waiting parameters
|
|
- `visible` <[boolean]> wait for element to be present in DOM and to be visible, i.e. to not have `display: none` or `visibility: hidden` CSS properties. Defaults to `false`.
|
|
- `hidden` <[boolean]> wait for element to not be found in the DOM or to be hidden, i.e. have `display: none` or `visibility: hidden` CSS properties. Defaults to `false`.
|
|
- `timeout` <[number]> maximum time to wait for in milliseconds. Defaults to `30000` (30 seconds).
|
|
- returns: <[Promise]<[ElementHandle]>> Promise which resolves when element specified by selector string is added to DOM.
|
|
|
|
Wait for the `selector` to appear in page. If at the moment of calling
|
|
the method the `selector` already exists, the method will return
|
|
immediately. If the selector doesn't appear after the `timeout` milliseconds of waiting, the function will throw.
|
|
|
|
This method works across navigations:
|
|
```js
|
|
const puppeteer = require('puppeteer');
|
|
|
|
puppeteer.launch().then(async browser => {
|
|
const page = await browser.newPage();
|
|
let currentURL;
|
|
page
|
|
.waitForSelector('img')
|
|
.then(() => console.log('First URL with image: ' + currentURL));
|
|
for (currentURL of ['https://example.com', 'https://google.com', 'https://bbc.com'])
|
|
await page.goto(currentURL);
|
|
await browser.close();
|
|
});
|
|
```
|
|
Shortcut for [page.mainFrame().waitForSelector(selector[, options])](#framewaitforselectorselector-options).
|
|
|
|
|
|
### class: Keyboard
|
|
|
|
Keyboard provides an api for managing a virtual keyboard. The high level api is [`keyboard.type`](#keyboardtypetext-options), which takes raw characters and generates proper keydown, keypress/input, and keyup events on your page.
|
|
|
|
For finer control, you can use [`keyboard.down`](#keyboarddownkey-options), [`keyboard.up`](#keyboardupkey), and [`keyboard.sendCharacter`](#keyboardsendcharacterchar) to manually fire events as if they were generated from a real keyboard.
|
|
|
|
An example of holding down `Shift` in order to select and delete some text:
|
|
```js
|
|
await page.keyboard.type('Hello World!');
|
|
await page.keyboard.press('ArrowLeft');
|
|
|
|
await page.keyboard.down('Shift');
|
|
for (let i = 0; i < ' World'.length; i++)
|
|
await page.keyboard.press('ArrowLeft');
|
|
await page.keyboard.up('Shift');
|
|
|
|
await page.keyboard.press('Backspace');
|
|
// Result text will end up saying 'Hello!'
|
|
```
|
|
|
|
An example of pressing `A`
|
|
```js
|
|
await page.keyboard.down('Shift');
|
|
await page.keyboard.press('KeyA');
|
|
await page.keyboard.up('Shift');
|
|
```
|
|
|
|
> **NOTE** On MacOS, keyboard shortcuts like `⌘ A` -> Select All do not work. See [#1313](https://github.com/GoogleChrome/puppeteer/issues/1313)
|
|
|
|
#### keyboard.down(key[, options])
|
|
- `key` <[string]> Name of key to press, such as `ArrowLeft`. See [USKeyboardLayout] for a list of all key names.
|
|
- `options` <[Object]>
|
|
- `text` <[string]> If specified, generates an input event with this text.
|
|
- returns: <[Promise]>
|
|
|
|
Dispatches a `keydown` event.
|
|
|
|
If `key` is a single character and no modifier keys besides `Shift` are being held down, a `keypress`/`input` event will also generated. The `text` option can be specified to force an input event to be generated.
|
|
|
|
If `key` is a modifier key, `Shift`, `Meta`, `Control`, or `Alt`, subsequent key presses will be sent with that modifier active. To release the modifier key, use [`keyboard.up`](#keyboardupkey).
|
|
|
|
After the key is pressed once, subsequent calls to [`keyboard.down`](#keyboarddownkey-options) will have [repeat](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/repeat) set to true. To release the key, use [`keyboard.up`](#keyboardupkey).
|
|
|
|
> **NOTE** Modifier keys DO influence `keyboard.down`. Holding down `Shift` will type the text in upper case.
|
|
|
|
#### keyboard.press(key[, options])
|
|
- `key` <[string]> Name of key to press, such as `ArrowLeft`. See [USKeyboardLayout] for a list of all key names.
|
|
- `options` <[Object]>
|
|
- `text` <[string]> If specified, generates an input event with this text.
|
|
- `delay` <[number]> Time to wait between `keydown` and `keyup` in milliseconds. Defaults to 0.
|
|
- returns: <[Promise]>
|
|
|
|
If `key` is a single character and no modifier keys besides `Shift` are being held down, a `keypress`/`input` event will also generated. The `text` option can be specified to force an input event to be generated.
|
|
|
|
> **NOTE** Modifier keys DO effect `elementHandle.press`. Holding down `Shift` will type the text in upper case.
|
|
|
|
Shortcut for [`keyboard.down`](#keyboarddownkey-options) and [`keyboard.up`](#keyboardupkey).
|
|
|
|
#### keyboard.sendCharacter(char)
|
|
- `char` <[string]> Character to send into the page.
|
|
- returns: <[Promise]>
|
|
|
|
Dispatches a `keypress` and `input` event. This does not send a `keydown` or `keyup` event.
|
|
|
|
```js
|
|
page.keyboard.sendCharacter('嗨');
|
|
```
|
|
|
|
> **NOTE** Modifier keys DO NOT effect `keyboard.sendCharacter`. Holding down `Shift` will not type the text in upper case.
|
|
|
|
#### keyboard.type(text, options)
|
|
- `text` <[string]> A text to type into a focused element.
|
|
- `options` <[Object]>
|
|
- `delay` <[number]> Time to wait between key presses in milliseconds. Defaults to 0.
|
|
- returns: <[Promise]>
|
|
|
|
Sends a `keydown`, `keypress`/`input`, and `keyup` event for each character in the text.
|
|
|
|
To press a special key, like `Control` or `ArrowDown`, use [`keyboard.press`](#keyboardpresskey-options).
|
|
|
|
```js
|
|
page.keyboard.type('Hello'); // Types instantly
|
|
page.keyboard.type('World', {delay: 100}); // Types slower, like a user
|
|
```
|
|
|
|
> **NOTE** Modifier keys DO NOT effect `keyboard.type`. Holding down `Shift` will not type the text in upper case.
|
|
|
|
#### keyboard.up(key)
|
|
- `key` <[string]> Name of key to release, such as `ArrowLeft`. See [USKeyboardLayout] for a list of all key names.
|
|
- returns: <[Promise]>
|
|
|
|
Dispatches a `keyup` event.
|
|
|
|
### class: Mouse
|
|
|
|
#### mouse.click(x, y, [options])
|
|
- `x` <[number]>
|
|
- `y` <[number]>
|
|
- `options` <[Object]>
|
|
- `button` <[string]> `left`, `right`, or `middle`, defaults to `left`.
|
|
- `clickCount` <[number]> defaults to 1. See [UIEvent.detail].
|
|
- `delay` <[number]> Time to wait between `mousedown` and `mouseup` in milliseconds. Defaults to 0.
|
|
- returns: <[Promise]>
|
|
|
|
Shortcut for [`mouse.move`](#mousemovex-y-options), [`mouse.down`](#mousedownoptions) and [`mouse.up`](#mouseupoptions).
|
|
|
|
#### mouse.down([options])
|
|
- `options` <[Object]>
|
|
- `button` <[string]> `left`, `right`, or `middle`, defaults to `left`.
|
|
- `clickCount` <[number]> defaults to 1. See [UIEvent.detail].
|
|
- returns: <[Promise]>
|
|
|
|
Dispatches a `mousedown` event.
|
|
|
|
#### mouse.move(x, y, [options])
|
|
- `x` <[number]>
|
|
- `y` <[number]>
|
|
- `options` <[Object]>
|
|
- `steps` <[number]> defaults to 1. Sends intermediate `mousemove` events.
|
|
- returns: <[Promise]>
|
|
|
|
Dispatches a `mousemove` event.
|
|
|
|
#### mouse.up([options])
|
|
- `options` <[Object]>
|
|
- `button` <[string]> `left`, `right`, or `middle`, defaults to `left`.
|
|
- `clickCount` <[number]> defaults to 1. See [UIEvent.detail].
|
|
- returns: <[Promise]>
|
|
|
|
Dispatches a `mouseup` event.
|
|
|
|
### class: Touchscreen
|
|
|
|
#### touchscreen.tap(x, y)
|
|
- `x` <[number]>
|
|
- `y` <[number]>
|
|
- returns: <[Promise]>
|
|
|
|
Dispatches a `touchstart` and `touchend` event.
|
|
|
|
### class: Tracing
|
|
|
|
You can use [`tracing.start`](#tracingstartoptions) and [`tracing.stop`](#tracingstop) to create a trace file which can be opened in Chrome DevTools or [timeline viewer](https://chromedevtools.github.io/timeline-viewer/).
|
|
|
|
```js
|
|
await page.tracing.start({path: 'trace.json'});
|
|
await page.goto('https://www.google.com');
|
|
await page.tracing.stop();
|
|
```
|
|
|
|
#### tracing.start(options)
|
|
- `options` <[Object]>
|
|
- `path` <[string]> A path to write the trace file to. **required**
|
|
- `screenshots` <[boolean]> captures screenshots in the trace.
|
|
- `categories` <[Array]<[string]>> specify custom categories to use instead of default.
|
|
- returns: <[Promise]>
|
|
|
|
Only one trace can be active at a time per browser.
|
|
|
|
#### tracing.stop()
|
|
- returns: <[Promise]>
|
|
|
|
### class: Dialog
|
|
|
|
[Dialog] objects are dispatched by page via the ['dialog'](#event-dialog) event.
|
|
|
|
An example of using `Dialog` class:
|
|
```js
|
|
const puppeteer = require('puppeteer');
|
|
|
|
puppeteer.launch().then(async browser => {
|
|
const page = await browser.newPage();
|
|
page.on('dialog', async dialog => {
|
|
console.log(dialog.message());
|
|
await dialog.dismiss();
|
|
await browser.close();
|
|
});
|
|
page.evaluate(() => alert('1'));
|
|
});
|
|
```
|
|
|
|
#### dialog.accept([promptText])
|
|
- `promptText` <[string]> A text to enter in prompt. Does not cause any effects if the dialog's `type` is not prompt.
|
|
- returns: <[Promise]> Promise which resolves when the dialog has been accepted.
|
|
|
|
#### dialog.defaultValue()
|
|
- returns: <[string]> If dialog is prompt, returns default prompt value. Otherwise, returns empty string.
|
|
|
|
#### dialog.dismiss()
|
|
- returns: <[Promise]> Promise which resolves when the dialog has been dismissed.
|
|
|
|
#### dialog.message()
|
|
- returns: <[string]> A message displayed in the dialog.
|
|
|
|
#### dialog.type()
|
|
- returns: <[string]> Dialog's type, can be one of `alert`, `beforeunload`, `confirm` or `prompt`.
|
|
|
|
### class: ConsoleMessage
|
|
|
|
[ConsoleMessage] objects are dispatched by page via the ['console'](#event-console) event.
|
|
|
|
#### consoleMessage.args()
|
|
- returns: <[Array]<[JSHandle]>>
|
|
|
|
#### consoleMessage.text()
|
|
- returns: <[string]>
|
|
|
|
#### consoleMessage.type()
|
|
- returns: <[string]>
|
|
|
|
One of the following values: `'log'`, `'debug'`, `'info'`, `'error'`, `'warning'`, `'dir'`, `'dirxml'`, `'table'`, `'trace'`, `'clear'`, `'startGroup'`, `'startGroupCollapsed'`, `'endGroup'`, `'assert'`, `'profile'`, `'profileEnd'`, `'count'`, `'timeEnd'`.
|
|
|
|
### class: Frame
|
|
|
|
At every point of time, page exposes its current frame tree via the [page.mainFrame()](#pagemainframe) and [frame.childFrames()](#framechildframes) methods.
|
|
|
|
[Frame] object's lifecycle is controlled by three events, dispatched on the page object:
|
|
- ['frameattached'](#event-frameattached) - fired when the frame gets attached to the page. A Frame can be attached to the page only once.
|
|
- ['framenavigated'](#event-framenavigated) - fired when the frame commits navigation to a different URL.
|
|
- ['framedetached'](#event-framedetached) - fired when the frame gets detached from the page. A Frame can be detached from the page only once.
|
|
|
|
An example of dumping frame tree:
|
|
|
|
```js
|
|
const puppeteer = require('puppeteer');
|
|
|
|
puppeteer.launch().then(async browser => {
|
|
const page = await browser.newPage();
|
|
await page.goto('https://www.google.com/chrome/browser/canary.html');
|
|
dumpFrameTree(page.mainFrame(), '');
|
|
await browser.close();
|
|
|
|
function dumpFrameTree(frame, indent) {
|
|
console.log(indent + frame.url());
|
|
for (let child of frame.childFrames())
|
|
dumpFrameTree(child, indent + ' ');
|
|
}
|
|
});
|
|
```
|
|
|
|
#### frame.$(selector)
|
|
- `selector` <[string]> Selector to query page for
|
|
- returns: <[Promise]<?[ElementHandle]>> Promise which resolves to ElementHandle pointing to the frame element.
|
|
|
|
The method queries frame for the selector. If there's no such element within the frame, the method will resolve to `null`.
|
|
|
|
#### frame.$$(selector)
|
|
- `selector` <[string]> Selector to query page for
|
|
- returns: <[Promise]<[Array]<[ElementHandle]>>> Promise which resolves to ElementHandles pointing to the frame elements.
|
|
|
|
The method runs `document.querySelectorAll` within the frame. If no elements match the selector, the return value resolve to `[]`.
|
|
|
|
#### frame.$$eval(selector, pageFunction[, ...args])
|
|
- `selector` <[string]> A [selector] to query frame for
|
|
- `pageFunction` <[function]> Function to be evaluated in browser context
|
|
- `...args` <...[Serializable]|[JSHandle]> Arguments to pass to `pageFunction`
|
|
- returns: <[Promise]<[Serializable]>> Promise which resolves to the return value of `pageFunction`
|
|
|
|
This method runs `document.querySelectorAll` within the frame and passes it as the first argument to `pageFunction`.
|
|
|
|
If `pageFunction` returns a [Promise], then `frame.$$eval` would wait for the promise to resolve and return its value.
|
|
|
|
Examples:
|
|
```js
|
|
const divsCounts = await frame.$$eval('div', divs => divs.length);
|
|
```
|
|
|
|
#### frame.$eval(selector, pageFunction[, ...args])
|
|
- `selector` <[string]> A [selector] to query frame for
|
|
- `pageFunction` <[function]> Function to be evaluated in browser context
|
|
- `...args` <...[Serializable]|[JSHandle]> Arguments to pass to `pageFunction`
|
|
- returns: <[Promise]<[Serializable]>> Promise which resolves to the return value of `pageFunction`
|
|
|
|
This method runs `document.querySelector` within the frame and passes it as the first argument to `pageFunction`. If there's no element matching `selector`, the method throws an error.
|
|
|
|
If `pageFunction` returns a [Promise], then `frame.$eval` would wait for the promise to resolve and return its value.
|
|
|
|
Examples:
|
|
```js
|
|
const searchValue = await frame.$eval('#search', el => el.value);
|
|
const preloadHref = await frame.$eval('link[rel=preload]', el => el.href);
|
|
const html = await frame.$eval('.main-container', e => e.outerHTML);
|
|
```
|
|
|
|
#### frame.$x(expression)
|
|
- `expression` <[string]> Expression to [evaluate](https://developer.mozilla.org/en-US/docs/Web/API/Document/evaluate).
|
|
- returns: <[Promise]<[Array]<[ElementHandle]>>>
|
|
|
|
The method evluates the XPath expression.
|
|
|
|
#### frame.addScriptTag(options)
|
|
- `options` <[Object]>
|
|
- `url` <[string]> Url of a script to be added.
|
|
- `path` <[string]> Path to the JavaScript file to be injected into frame. If `path` is a relative path, then it is resolved relative to [current working directory](https://nodejs.org/api/process.html#process_process_cwd).
|
|
- `content` <[string]> Raw JavaScript content to be injected into frame.
|
|
- returns: <[Promise]<[ElementHandle]>> which resolves to the added tag when the script's onload fires or when the script content was injected into frame.
|
|
|
|
Adds a `<script>` tag into the page with the desired url or content.
|
|
|
|
#### frame.addStyleTag(options)
|
|
- `options` <[Object]>
|
|
- `url` <[string]> Url of the `<link>` tag.
|
|
- `path` <[string]> Path to the CSS file to be injected into frame. If `path` is a relative path, then it is resolved relative to [current working directory](https://nodejs.org/api/process.html#process_process_cwd).
|
|
- `content` <[string]> Raw CSS content to be injected into frame.
|
|
- returns: <[Promise]<[ElementHandle]>> which resolves to the added tag when the stylesheet's onload fires or when the CSS content was injected into frame.
|
|
|
|
Adds a `<link rel="stylesheet">` tag into the page with the desired url or a `<style type="text/css">` tag with the content.
|
|
|
|
#### frame.childFrames()
|
|
- returns: <[Array]<[Frame]>>
|
|
|
|
#### frame.content()
|
|
- returns: <[Promise]<[String]>>
|
|
|
|
Gets the full HTML contents of the frame, including the doctype.
|
|
|
|
#### frame.evaluate(pageFunction, ...args)
|
|
- `pageFunction` <[function]|[string]> Function to be evaluated in browser context
|
|
- `...args` <...[Serializable]|[JSHandle]> Arguments to pass to `pageFunction`
|
|
- returns: <[Promise]<[Serializable]>> Promise which resolves to function return value
|
|
|
|
If the function, passed to the `frame.evaluate`, returns a [Promise], then `frame.evaluate` would wait for the promise to resolve and return its value.
|
|
|
|
If the function passed into `frame.evaluate` returns a non-[Serializable] value, then `frame.evaluate` resolves to `undefined`.
|
|
|
|
```js
|
|
const result = await frame.evaluate(() => {
|
|
return Promise.resolve(8 * 7);
|
|
});
|
|
console.log(result); // prints "56"
|
|
```
|
|
|
|
A string can also be passed in instead of a function.
|
|
|
|
```js
|
|
console.log(await frame.evaluate('1 + 2')); // prints "3"
|
|
```
|
|
|
|
[ElementHandle] instances can be passed as arguments to the `frame.evaluate`:
|
|
```js
|
|
const bodyHandle = await frame.$('body');
|
|
const html = await frame.evaluate(body => body.innerHTML, bodyHandle);
|
|
await bodyHandle.dispose();
|
|
```
|
|
|
|
#### frame.executionContext()
|
|
- returns: <[Promise]<[ExecutionContext]>> Execution context associated with this frame.
|
|
|
|
#### frame.isDetached()
|
|
- returns: <[boolean]>
|
|
|
|
Returns `true` if the frame has been detached, or `false` otherwise.
|
|
|
|
#### frame.name()
|
|
- returns: <[string]>
|
|
|
|
Returns frame's name attribute as specified in the tag.
|
|
|
|
If the name is empty, returns the id attribute instead.
|
|
|
|
> **NOTE** This value is calculated once when the frame is created, and will not update if the attribute is changed later.
|
|
|
|
#### frame.parentFrame()
|
|
- returns: <?[Frame]> Returns parent frame, if any. Detached frames and main frames return `null`.
|
|
|
|
#### frame.select(selector, ...values)
|
|
- `selector` <[string]> A [selector] to query frame for
|
|
- `...values` <...[string]> Values of options to select. If the `<select>` has the `multiple` attribute, all values are considered, otherwise only the first one is taken into account.
|
|
- returns: <[Promise]<[Array]<[string]>>> Returns an array of option values that have been successfully selected.
|
|
|
|
Triggers a `change` and `input` event once all the provided options have been selected.
|
|
If there's no `<select>` element matching `selector`, the method throws an error.
|
|
|
|
```js
|
|
frame.select('select#colors', 'blue'); // single selection
|
|
frame.select('select#colors', 'red', 'green', 'blue'); // multiple selections
|
|
```
|
|
|
|
#### frame.setContent(html)
|
|
- `html` <[string]> HTML markup to assign to the page.
|
|
- returns: <[Promise]>
|
|
|
|
#### frame.title()
|
|
- returns: <[Promise]<[string]>> Returns page's title.
|
|
|
|
#### frame.url()
|
|
- returns: <[string]>
|
|
|
|
Returns frame's url.
|
|
|
|
#### frame.waitFor(selectorOrFunctionOrTimeout[, options[, ...args]])
|
|
- `selectorOrFunctionOrTimeout` <[string]|[number]|[function]> A [selector], predicate or timeout to wait for
|
|
- `options` <[Object]> Optional waiting parameters
|
|
- `...args` <...[Serializable]|[JSHandle]> Arguments to pass to `pageFunction`
|
|
- returns: <[Promise]<[JSHandle]>> Promise which resolves to a JSHandle of the success value
|
|
|
|
This method behaves differently with respect to the type of the first parameter:
|
|
- if `selectorOrFunctionOrTimeout` is a `string`, then the first argument is treated as a [selector] to wait for and the method is a shortcut for [frame.waitForSelector](#framewaitforselectorselector-options)
|
|
- if `selectorOrFunctionOrTimeout` is a `function`, then the first argument is treated as a predicate to wait for and the method is a shortcut for [frame.waitForFunction()](#framewaitforfunctionpagefunction-options-args).
|
|
- if `selectorOrFunctionOrTimeout` is a `number`, then the first argument is treated as a timeout in milliseconds and the method returns a promise which resolves after the timeout
|
|
- otherwise, an exception is thrown
|
|
|
|
|
|
#### frame.waitForFunction(pageFunction[, options[, ...args]])
|
|
- `pageFunction` <[function]|[string]> Function to be evaluated in browser context
|
|
- `options` <[Object]> Optional waiting parameters
|
|
- `polling` <[string]|[number]> An interval at which the `pageFunction` is executed, defaults to `raf`. If `polling` is a number, then it is treated as an interval in milliseconds at which the function would be executed. If `polling` is a string, then it can be one of the following values:
|
|
- `raf` - to constantly execute `pageFunction` in `requestAnimationFrame` callback. This is the tightest polling mode which is suitable to observe styling changes.
|
|
- `mutation` - to execute `pageFunction` on every DOM mutation.
|
|
- `timeout` <[number]> maximum time to wait for in milliseconds. Defaults to `30000` (30 seconds).
|
|
- `...args` <...[Serializable]|[JSHandle]> Arguments to pass to `pageFunction`
|
|
- returns: <[Promise]<[JSHandle]>> Promise which resolves when the `pageFunction` returns a truthy value. It resolves to a JSHandle of the truthy value.
|
|
|
|
The `waitForFunction` can be used to observe viewport size change:
|
|
```js
|
|
const puppeteer = require('puppeteer');
|
|
|
|
puppeteer.launch().then(async browser => {
|
|
const page = await browser.newPage();
|
|
const watchDog = page.mainFrame().waitForFunction('window.innerWidth < 100');
|
|
page.setViewport({width: 50, height: 50});
|
|
await watchDog;
|
|
await browser.close();
|
|
});
|
|
```
|
|
|
|
#### frame.waitForSelector(selector[, options])
|
|
- `selector` <[string]> A [selector] of an element to wait for,
|
|
- `options` <[Object]> Optional waiting parameters
|
|
- `visible` <[boolean]> wait for element to be present in DOM and to be visible, i.e. to not have `display: none` or `visibility: hidden` CSS properties. Defaults to `false`.
|
|
- `hidden` <[boolean]> wait for element to not be found in the DOM or to be hidden, i.e. have `display: none` or `visibility: hidden` CSS properties. Defaults to `false`.
|
|
- `timeout` <[number]> maximum time to wait for in milliseconds. Defaults to `30000` (30 seconds).
|
|
- returns: <[Promise]<[ElementHandle]>> Promise which resolves when element specified by selector string is added to DOM.
|
|
|
|
Wait for the `selector` to appear in page. If at the moment of calling
|
|
the method the `selector` already exists, the method will return
|
|
immediately. If the selector doesn't appear after the `timeout` milliseconds of waiting, the function will throw.
|
|
|
|
This method works across navigations:
|
|
```js
|
|
const puppeteer = require('puppeteer');
|
|
|
|
puppeteer.launch().then(async browser => {
|
|
const page = await browser.newPage();
|
|
let currentURL;
|
|
page.mainFrame()
|
|
.waitForSelector('img')
|
|
.then(() => console.log('First URL with image: ' + currentURL));
|
|
for (currentURL of ['https://example.com', 'https://google.com', 'https://bbc.com'])
|
|
await page.goto(currentURL);
|
|
await browser.close();
|
|
});
|
|
```
|
|
|
|
### class: ExecutionContext
|
|
|
|
The class represents a context for JavaScript execution. Examples of JavaScript contexts are:
|
|
- each [frame](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe) has a separate execution context
|
|
- all kind of [workers](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API) have their own contexts
|
|
|
|
#### executionContext.evaluate(pageFunction, ...args)
|
|
- `pageFunction` <[function]|[string]> Function to be evaluated in `executionContext`
|
|
- `...args` <...[Serializable]|[JSHandle]> Arguments to pass to `pageFunction`
|
|
- returns: <[Promise]<[Serializable]>> Promise which resolves to function return value
|
|
|
|
If the function, passed to the `executionContext.evaluate`, returns a [Promise], then `executionContext.evaluate` would wait for the promise to resolve and return its value.
|
|
|
|
```js
|
|
const executionContext = page.mainFrame().executionContext();
|
|
const result = await executionContext.evaluate(() => Promise.resolve(8 * 7));
|
|
console.log(result); // prints "56"
|
|
```
|
|
|
|
A string can also be passed in instead of a function.
|
|
|
|
```js
|
|
console.log(await executionContext.evaluate('1 + 2')); // prints "3"
|
|
```
|
|
|
|
[JSHandle] instances can be passed as arguments to the `executionContext.evaluate`:
|
|
```js
|
|
const oneHandle = await executionContext.evaluateHandle(() => 1);
|
|
const twoHandle = await executionContext.evaluateHandle(() => 2);
|
|
const result = await executionContext.evaluate((a, b) => a + b, oneHandle, twoHandle);
|
|
await oneHandle.dispose();
|
|
await twoHandle.dispose();
|
|
console.log(result); // prints '3'.
|
|
```
|
|
|
|
#### executionContext.evaluateHandle(pageFunction, ...args)
|
|
- `pageFunction` <[function]|[string]> Function to be evaluated in the `executionContext`
|
|
- `...args` <...[Serializable]|[JSHandle]> Arguments to pass to `pageFunction`
|
|
- returns: <[Promise]<[JSHandle]>> Resolves to the return value of `pageFunction`
|
|
|
|
If the function, passed to the `executionContext.evaluateHandle`, returns a [Promise], then `executionContext.evaluteHandle` would wait for the promise to resolve and return its value.
|
|
|
|
```js
|
|
const context = page.mainFrame().executionContext();
|
|
const aHandle = await context.evaluateHandle(() => Promise.resolve(self));
|
|
aHandle; // Handle for the global object.
|
|
```
|
|
|
|
A string can also be passed in instead of a function.
|
|
|
|
```js
|
|
const aHandle = await context.evaluateHandle('1 + 2'); // Handle for the '3' object.
|
|
```
|
|
|
|
[JSHandle] instances can be passed as arguments to the `executionContext.evaluateHandle`:
|
|
```js
|
|
const aHandle = await context.evaluateHandle(() => document.body);
|
|
const resultHandle = await context.evaluateHandle(body => body.innerHTML, aHandle);
|
|
console.log(await resultHandle.jsonValue()); // prints body's innerHTML
|
|
await aHandle.dispose();
|
|
await resultHandle.dispose();
|
|
```
|
|
|
|
#### executionContext.queryObjects(prototypeHandle)
|
|
- `prototypeHandle` <[JSHandle]> A handle to the object prototype.
|
|
- returns: <[JSHandle]> A handle to an array of objects with this prototype
|
|
|
|
The method iterates JavaScript heap and finds all the objects with the given prototype.
|
|
|
|
```js
|
|
// Create a Map object
|
|
await page.evaluate(() => window.map = new Map());
|
|
// Get a handle to the Map object prototype
|
|
const mapPrototype = await page.evaluateHandle(() => Map.prototype);
|
|
// Query all map instances into an array
|
|
const mapInstances = await page.queryObjects(mapPrototype);
|
|
// Count amount of map objects in heap
|
|
const count = await page.evaluate(maps => maps.length, mapInstances);
|
|
await mapInstances.dispose();
|
|
await mapPrototype.dispose();
|
|
```
|
|
|
|
### class: JSHandle
|
|
|
|
JSHandle represents an in-page JavaScript object. JSHandles can be created with the [page.evaluateHandle](#pageevaluatehandlepagefunction-args) method.
|
|
|
|
```js
|
|
const windowHandle = await page.evaluateHandle(() => window);
|
|
// ...
|
|
```
|
|
|
|
JSHandle prevents references JavaScript objects from garbage collection unless the handle is [disposed](#jshandledispose). JSHandles are auto-disposed when their origin frame gets navigated or the parent context gets destroyed.
|
|
|
|
JSHandle instances can be used as arguments in [`page.$eval()`](#pageevalselector-pagefunction-args), [`page.evaluate()`](#pageevaluatepagefunction-args) and [`page.evaluateHandle`](#pageevaluatehandlepagefunction-args) methods.
|
|
|
|
#### jsHandle.asElement()
|
|
- returns: <?[ElementHandle]>
|
|
|
|
Returns either `null` or the object handle itself, if the object handle is an instance of [ElementHandle].
|
|
|
|
#### jsHandle.dispose()
|
|
- returns: <[Promise]> Promise which resolves when the object handle is successfully disposed.
|
|
|
|
The `jsHandle.dispose` method stops referencing the element handle.
|
|
|
|
#### jsHandle.executionContext()
|
|
- returns: [ExecutionContext]
|
|
|
|
Returns execution context the handle belongs to.
|
|
|
|
#### jsHandle.getProperties()
|
|
- returns: <[Promise]<[Map]<[string], [JSHandle]>>>
|
|
|
|
The method returns a map with property names as keys and JSHandle instances for the property values.
|
|
|
|
```js
|
|
const handle = await page.evaluateHandle(() => ({window, document}));
|
|
const properties = await handle.getProperties();
|
|
const windowHandle = properties.get('window');
|
|
const documentHandle = properties.get('document');
|
|
await handle.dispose();
|
|
```
|
|
|
|
#### jsHandle.getProperty(propertyName)
|
|
- `propertyName` <[string]> property to get
|
|
- returns: <[Promise]<[JSHandle]>>
|
|
|
|
Fetches a single property from the referenced object.
|
|
|
|
#### jsHandle.jsonValue()
|
|
- returns: <[Promise]<[Object]>>
|
|
|
|
Returns a JSON representation of the object. If the object has a
|
|
[`toJSON`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#toJSON()_behavior)
|
|
function, it **will not be called**.
|
|
|
|
> **NOTE** The method will return an empty JSON if the referenced object is not stringifiable. It will throw an error if the object has circular references.
|
|
|
|
### class: ElementHandle
|
|
|
|
> **NOTE** Class [ElementHandle] extends [JSHandle].
|
|
|
|
ElementHandle represents an in-page DOM element. ElementHandles can be created with the [page.$](#pageselector) method.
|
|
|
|
```js
|
|
const puppeteer = require('puppeteer');
|
|
|
|
puppeteer.launch().then(async browser => {
|
|
const page = await browser.newPage();
|
|
await page.goto('https://google.com');
|
|
const inputElement = await page.$('input[type=submit]');
|
|
await inputElement.click();
|
|
// ...
|
|
});
|
|
```
|
|
|
|
ElementHandle prevents DOM element from garbage collection unless the handle is [disposed](#elementhandledispose). ElementHandles are auto-disposed when their origin frame gets navigated.
|
|
|
|
ElementHandle instances can be used as arguments in [`page.$eval()`](#pageevalselector-pagefunction-args) and [`page.evaluate()`](#pageevaluatepagefunction-args) methods.
|
|
|
|
#### elementHandle.$(selector)
|
|
- `selector` <[string]> A [selector] to query element for
|
|
- returns: <[Promise]<?[ElementHandle]>>
|
|
|
|
The method runs `element.querySelector` within the page. If no element matches the selector, the return value resolve to `null`.
|
|
|
|
#### elementHandle.$$(selector)
|
|
- `selector` <[string]> A [selector] to query element for
|
|
- returns: <[Promise]<[Array]<[ElementHandle]>>>
|
|
|
|
The method runs `element.querySelectorAll` within the page. If no elements match the selector, the return value resolve to `[]`.
|
|
|
|
#### elementHandle.$x(expression)
|
|
- `expression` <[string]> Expression to [evaluate](https://developer.mozilla.org/en-US/docs/Web/API/Document/evaluate).
|
|
- returns: <[Promise]<?[ElementHandle]>> Promise which resolves to ElementHandle pointing to the frame element.
|
|
|
|
The method evluates the XPath expression relative to the elementHandle. If there's no such element, the method will resolve to `null`.
|
|
|
|
#### elementHandle.asElement()
|
|
- returns: <[elementhandle]>
|
|
|
|
#### elementHandle.boundingBox()
|
|
- returns: <[Promise]<?[Object]>>
|
|
- x <[number]> the x coordinate of the element in pixels.
|
|
- y <[number]> the y coordinate of the element in pixels.
|
|
- width <[number]> the width of the element in pixels.
|
|
- height <[number]> the height of the element in pixels.
|
|
|
|
This method returns the bounding box of the element (relative to the main frame), or `null` if the element is not visible.
|
|
|
|
#### elementHandle.click([options])
|
|
- `options` <[Object]>
|
|
- `button` <[string]> `left`, `right`, or `middle`, defaults to `left`.
|
|
- `clickCount` <[number]> defaults to 1. See [UIEvent.detail].
|
|
- `delay` <[number]> Time to wait between `mousedown` and `mouseup` in milliseconds. Defaults to 0.
|
|
- returns: <[Promise]> Promise which resolves when the element is successfully clicked. Promise gets rejected if the element is detached from DOM.
|
|
|
|
This method scrolls element into view if needed, and then uses [page.mouse](#pagemouse) to click in the center of the element.
|
|
If the element is detached from DOM, the method throws an error.
|
|
|
|
#### elementHandle.dispose()
|
|
- returns: <[Promise]> Promise which resolves when the element handle is successfully disposed.
|
|
|
|
The `elementHandle.dispose` method stops referencing the element handle.
|
|
|
|
#### elementHandle.executionContext()
|
|
- returns: [ExecutionContext]
|
|
|
|
#### elementHandle.focus()
|
|
- returns: <[Promise]>
|
|
|
|
Calls [focus](https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/focus) on the element.
|
|
|
|
#### elementHandle.getProperties()
|
|
- returns: <[Promise]<[Map]<[string], [JSHandle]>>>
|
|
|
|
The method returns a map with property names as keys and JSHandle instances for the property values.
|
|
|
|
```js
|
|
const listHandle = await page.evaluateHandle(() => document.body.children);
|
|
const properties = await listHandle.getProperties();
|
|
const children = [];
|
|
for (const property of properties.values()) {
|
|
const element = property.asElement();
|
|
if (element)
|
|
children.push(element);
|
|
}
|
|
children; // holds elementHandles to all children of document.body
|
|
```
|
|
|
|
#### elementHandle.getProperty(propertyName)
|
|
- `propertyName` <[string]> property to get
|
|
- returns: <[Promise]<[JSHandle]>>
|
|
|
|
Fetches a single property from the objectHandle.
|
|
|
|
#### elementHandle.hover()
|
|
- returns: <[Promise]> Promise which resolves when the element is successfully hovered.
|
|
|
|
This method scrolls element into view if needed, and then uses [page.mouse](#pagemouse) to hover over the center of the element.
|
|
If the element is detached from DOM, the method throws an error.
|
|
|
|
#### elementHandle.jsonValue()
|
|
- returns: <[Promise]<[Object]>>
|
|
|
|
Returns a JSON representation of the object. The JSON is generated by running [`JSON.stringify`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify) on the object in page and consequent [`JSON.parse`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse) in puppeteer.
|
|
|
|
> **NOTE** The method will throw if the referenced object is not stringifiable.
|
|
|
|
#### elementHandle.press(key[, options])
|
|
- `key` <[string]> Name of key to press, such as `ArrowLeft`. See [USKeyboardLayout] for a list of all key names.
|
|
- `options` <[Object]>
|
|
- `text` <[string]> If specified, generates an input event with this text.
|
|
- `delay` <[number]> Time to wait between `keydown` and `keyup` in milliseconds. Defaults to 0.
|
|
- returns: <[Promise]>
|
|
|
|
Focuses the element, and then uses [`keyboard.down`](#keyboarddownkey-options) and [`keyboard.up`](#keyboardupkey).
|
|
|
|
If `key` is a single character and no modifier keys besides `Shift` are being held down, a `keypress`/`input` event will also be generated. The `text` option can be specified to force an input event to be generated.
|
|
|
|
> **NOTE** Modifier keys DO effect `elementHandle.press`. Holding down `Shift` will type the text in upper case.
|
|
|
|
#### elementHandle.screenshot([options])
|
|
- `options` <[Object]> Same options as in [page.screenshot](#pagescreenshotoptions).
|
|
- returns: <[Promise]<[Buffer]>> Promise which resolves to buffer with captured screenshot.
|
|
|
|
This method scrolls element into view if needed, and then uses [page.screenshot](#pagescreenshotoptions) to take a screenshot of the element.
|
|
If the element is detached from DOM, the method throws an error.
|
|
|
|
#### elementHandle.tap()
|
|
- returns: <[Promise]> Promise which resolves when the element is successfully tapped. Promise gets rejected if the element is detached from DOM.
|
|
|
|
This method scrolls element into view if needed, and then uses [touchscreen.tap](#touchscreentapx-y) to tap in the center of the element.
|
|
If the element is detached from DOM, the method throws an error.
|
|
|
|
#### elementHandle.toString()
|
|
- returns: <[string]>
|
|
|
|
#### elementHandle.type(text[, options])
|
|
- `text` <[string]> A text to type into a focused element.
|
|
- `options` <[Object]>
|
|
- `delay` <[number]> Time to wait between key presses in milliseconds. Defaults to 0.
|
|
- returns: <[Promise]>
|
|
|
|
Focuses the element, and then sends a `keydown`, `keypress`/`input`, and `keyup` event for each character in the text.
|
|
|
|
To press a special key, like `Control` or `ArrowDown`, use [`elementHandle.press`](#elementhandlepresskey-options).
|
|
|
|
```js
|
|
elementHandle.type('Hello'); // Types instantly
|
|
elementHandle.type('World', {delay: 100}); // Types slower, like a user
|
|
```
|
|
|
|
An example of typing into a text field and then submitting the form:
|
|
```js
|
|
const elementHandle = await page.$('input');
|
|
await elementHandle.type('some text');
|
|
await elementHandle.press('Enter');
|
|
```
|
|
|
|
#### elementHandle.uploadFile(...filePaths)
|
|
- `...filePaths` <...[string]> Sets the value of the file input these paths. If some of the `filePaths` are relative paths, then they are resolved relative to [current working directory](https://nodejs.org/api/process.html#process_process_cwd).
|
|
- returns: <[Promise]>
|
|
|
|
This method expects `elementHandle` to point to an [input element](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input).
|
|
|
|
### class: Request
|
|
|
|
Whenever the page sends a request, the following events are emitted by puppeteer's page:
|
|
- ['request'](#event-request) emitted when the request is issued by the page.
|
|
- ['response'](#event-response) emitted when/if the response is received for the request.
|
|
- ['requestfinished'](#event-requestfinished) emitted when the response body is downloaded and the request is complete.
|
|
|
|
If request fails at some point, then instead of 'requestfinished' event (and possibly instead of 'response' event), the ['requestfailed'](#event-requestfailed) event is emitted.
|
|
|
|
If request gets a 'redirect' response, the request is successfully finished with the 'requestfinished' event, and a new request is issued to a redirected url.
|
|
|
|
#### request.abort([errorCode])
|
|
- `errorCode` <[string]> Optional error code. Defaults to `failed`, could be
|
|
one of the following:
|
|
- `aborted` - An operation was aborted (due to user action)
|
|
- `accessdenied` - Permission to access a resource, other than the network, was denied
|
|
- `addressunreachable` - The IP address is unreachable. This usually means
|
|
that there is no route to the specified host or network.
|
|
- `connectionaborted` - A connection timed out as a result of not receiving an ACK for data sent.
|
|
- `connectionclosed` - A connection was closed (corresponding to a TCP FIN).
|
|
- `connectionfailed` - A connection attempt failed.
|
|
- `connectionrefused` - A connection attempt was refused.
|
|
- `connectionreset` - A connection was reset (corresponding to a TCP RST).
|
|
- `internetdisconnected` - The Internet connection has been lost.
|
|
- `namenotresolved` - The host name could not be resolved.
|
|
- `timedout` - An operation timed out.
|
|
- `failed` - A generic failure occurred.
|
|
- returns: <[Promise]>
|
|
|
|
Aborts request. To use this, request interception should be enabled with `page.setRequestInterception`.
|
|
Exception is immediately thrown if the request interception is not enabled.
|
|
|
|
#### request.continue([overrides])
|
|
- `overrides` <[Object]> Optional request overwrites, which can be one of the following:
|
|
- `url` <[string]> If set, the request url will be changed
|
|
- `method` <[string]> If set changes the request method (e.g. `GET` or `POST`)
|
|
- `postData` <[string]> If set changes the post data of request
|
|
- `headers` <[Object]> If set changes the request HTTP headers
|
|
- returns: <[Promise]>
|
|
|
|
Continues request with optional request overrides. To use this, request interception should be enabled with `page.setRequestInterception`.
|
|
Exception is immediately thrown if the request interception is not enabled.
|
|
|
|
#### request.failure()
|
|
- returns: <?[Object]> Object describing request failure, if any
|
|
- `errorText` <[string]> Human-readable error message, e.g. `'net::ERR_FAILED'`.
|
|
|
|
The method returns `null` unless this request was failed, as reported by
|
|
`requestfailed` event.
|
|
|
|
Example of logging all failed requests:
|
|
|
|
```js
|
|
page.on('requestfailed', request => {
|
|
console.log(request.url + ' ' + request.failure().errorText);
|
|
});
|
|
```
|
|
|
|
#### request.frame()
|
|
- returns: <?[Frame]> A matching [Frame] object, or `null` if navigating to error pages.
|
|
|
|
#### request.headers()
|
|
- returns: <[Object]> An object with HTTP headers associated with the request. All header names are lower-case.
|
|
|
|
#### request.method()
|
|
- returns: <[string]> Request's method (GET, POST, etc.)
|
|
|
|
#### request.postData()
|
|
- returns: <[string]> Request's post body, if any.
|
|
|
|
#### request.resourceType()
|
|
- returns: <[string]>
|
|
|
|
Contains the request's resource type as it was perceived by the rendering engine.
|
|
ResourceType will be one of the following: `document`, `stylesheet`, `image`, `media`, `font`, `script`, `texttrack`, `xhr`, `fetch`, `eventsource`, `websocket`, `manifest`, `other`.
|
|
|
|
#### request.respond(response)
|
|
- `response` <[Object]> Response that will fulfill this request
|
|
- `status` <[number]> Response status code, defaults to `200`.
|
|
- `headers` <[Object]> Optional response headers
|
|
- `contentType` <[string]> If set, equals to setting `Content-Type` response header
|
|
- `body` <[Buffer]|[string]> Optional response body
|
|
- returns: <[Promise]>
|
|
|
|
Fulfills request with given response. To use this, request interception should
|
|
be enabled with `page.setRequestInterception`. Exception is thrown if
|
|
request interception is not enabled.
|
|
|
|
An example of fulfilling all requests with 404 responses:
|
|
|
|
```js
|
|
await page.setRequestInterception(true);
|
|
page.on('request', request => {
|
|
request.respond({
|
|
status: 404,
|
|
contentType: 'text/plain',
|
|
body: 'Not Found!'
|
|
});
|
|
});
|
|
```
|
|
|
|
> **NOTE** Mocking responses for dataURL requests is not supported.
|
|
> Calling `request.respond` for a dataURL request is a noop.
|
|
|
|
#### request.response()
|
|
- returns: <?[Response]> A matching [Response] object, or `null` if the response has not been received yet.
|
|
|
|
#### request.url()
|
|
- returns: <[string]> URL of the request.
|
|
|
|
### class: Response
|
|
|
|
[Response] class represents responses which are received by page.
|
|
|
|
#### response.buffer()
|
|
- returns: <Promise<[Buffer]>> Promise which resolves to a buffer with response body.
|
|
|
|
#### response.headers()
|
|
- returns: <[Object]> An object with HTTP headers associated with the response. All header names are lower-case.
|
|
|
|
#### response.json()
|
|
- returns: <Promise<[Object]>> Promise which resolves to a JSON representation of response body.
|
|
|
|
This method will throw if the response body is not parsable via `JSON.parse`.
|
|
|
|
#### response.ok()
|
|
- returns: <[boolean]>
|
|
|
|
Contains a boolean stating whether the response was successful (status in the range 200-299) or not.
|
|
|
|
#### response.request()
|
|
- returns: <[Request]> A matching [Request] object.
|
|
|
|
#### response.status()
|
|
- returns: <[number]>
|
|
|
|
Contains the status code of the response (e.g., 200 for a success).
|
|
|
|
#### response.text()
|
|
- returns: <[Promise]<[string]>> Promise which resolves to a text representation of response body.
|
|
|
|
#### response.url()
|
|
- returns: <[string]>
|
|
|
|
Contains the URL of the response.
|
|
|
|
### class: Target
|
|
|
|
#### target.createCDPSession()
|
|
- returns: <[Promise]<[CDPSession]>>
|
|
|
|
Creates a Chrome Devtools Protocol session attached to the target.
|
|
|
|
#### target.page()
|
|
- returns: <[Promise]<?[Page]>>
|
|
|
|
If the target is not of type `"page"`, returns `null`.
|
|
|
|
#### target.type()
|
|
- returns: <[string]>
|
|
|
|
Identifies what kind of target this is. Can be `"page"`, `"service_worker"`, or `"other"`.
|
|
|
|
#### target.url()
|
|
- returns: <[string]>
|
|
|
|
|
|
### class: CDPSession
|
|
|
|
* extends: [`EventEmitter`](https://nodejs.org/api/events.html#events_class_eventemitter)
|
|
|
|
The `CDPSession` instances are used to talk raw Chrome Devtools Protocol:
|
|
- protocol methods can be called with `session.send` method.
|
|
- protocol events can be subscribed to with `session.on` method.
|
|
|
|
Documentation on DevTools Protocol can be found here: [DevTools Protocol Viewer](https://chromedevtools.github.io/devtools-protocol/).
|
|
|
|
```js
|
|
const client = await page.target().createCDPSession();
|
|
await client.send('Animation.enable');
|
|
await client.on('Animation.animationCreated', () => console.log('Animation created!'));
|
|
const response = await client.send('Animation.getPlaybackRate');
|
|
console.log('playback rate is ' + response.playbackRate);
|
|
await client.send('Animation.setPlaybackRate', {
|
|
playbackRate: response.playbackRate / 2
|
|
});
|
|
```
|
|
|
|
#### cdpSession.detach()
|
|
- returns: <[Promise]>
|
|
|
|
Detaches session from target. Once detached, session won't emit any events and can't be used
|
|
to send messages.
|
|
|
|
#### cdpSession.send(method[, params])
|
|
- `method` <[string]> protocol method name
|
|
- `params` <[Object]> Optional method parameters
|
|
- returns: <[Promise]<[Object]>>
|
|
|
|
|
|
### class: Coverage
|
|
|
|
Coverage gathers information about parts of JavaScript and CSS that were used by the page.
|
|
|
|
An example of using JavaScript and CSS coverage to get percentage of initially
|
|
executed code:
|
|
|
|
```js
|
|
// Enable both JavaScript and CSS coverage
|
|
await Promise.all([
|
|
page.startJSCoverage(),
|
|
page.startCSSCoverage()
|
|
]);
|
|
// Navigate to page
|
|
await page.goto('https://example.com');
|
|
// Disable both JavaScript and CSS coverage
|
|
const [jsCoverage, cssCoverage] = await Promise.all([
|
|
page.stopJSCoverage(),
|
|
page.stopCSSCoverage(),
|
|
]);
|
|
let totalBytes = 0;
|
|
let usedBytes = 0;
|
|
const coverage = [].concat(jsCoverage, cssCoverage);
|
|
for (const entry of coverage) {
|
|
totalBytes += entry.text.length;
|
|
for (const range of entry.ranges)
|
|
usedBytes += range.end - range.start - 1;
|
|
}
|
|
console.log(`Bytes used: ${usedBytes / totalBytes * 100}%`);
|
|
```
|
|
|
|
#### coverage.startCSSCoverage(options)
|
|
- `options` <[Object]> Set of configurable options for coverage
|
|
- `resetOnNavigation` <[boolean]> Whether to reset coverage on every navigation. Defaults to `true`.
|
|
- returns: <[Promise]> Promise that resolves when coverage is started
|
|
|
|
#### coverage.startJSCoverage(options)
|
|
- `options` <[Object]> Set of configurable options for coverage
|
|
- `resetOnNavigation` <[boolean]> Whether to reset coverage on every navigation. Defaults to `true`.
|
|
- returns: <[Promise]> Promise that resolves when coverage is started
|
|
|
|
#### coverage.stopCSSCoverage()
|
|
- returns: <[Promise]<[Array]<[Object]>>> Promise that resolves to the array of coverage reports for all stylesheets
|
|
- `url` <[string]> StyleSheet URL
|
|
- `text` <[string]> StyleSheet content
|
|
- `ranges` <[Array]<[Object]>> StyleSheet ranges that were used. Ranges are sorted and non-overlapping.
|
|
- `start` <[number]> A start offset in text, inclusive
|
|
- `end` <[number]> An end offset in text, exclusive
|
|
|
|
> **NOTE** CSS Coverage doesn't include dynamically injected style tags without sourceURLs.
|
|
|
|
|
|
#### coverage.stopJSCoverage()
|
|
- returns: <[Promise]<[Array]<[Object]>>> Promise that resolves to the array of coverage reports for all non-anonymous scripts
|
|
- `url` <[string]> Script URL
|
|
- `text` <[string]> Script content
|
|
- `ranges` <[Array]<[Object]>> Script ranges that were executed. Ranges are sorted and non-overlapping.
|
|
- `start` <[number]> A start offset in text, inclusive
|
|
- `end` <[number]> An end offset in text, exclusive
|
|
|
|
> **NOTE** JavaScript Coverage doesn't include anonymous scripts; however, scripts with sourceURLs are
|
|
reported.
|
|
|
|
|
|
[Array]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array "Array"
|
|
[boolean]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type "Boolean"
|
|
[Buffer]: https://nodejs.org/api/buffer.html#buffer_class_buffer "Buffer"
|
|
[function]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function "Function"
|
|
[number]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type "Number"
|
|
[Object]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object "Object"
|
|
[Page]: #class-page "Page"
|
|
[Promise]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise "Promise"
|
|
[string]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type "String"
|
|
[stream.Readable]: https://nodejs.org/api/stream.html#stream_class_stream_readable "stream.Readable"
|
|
[CDPSession]: #class-cdpsession "CDPSession"
|
|
[Error]: https://nodejs.org/api/errors.html#errors_class_error "Error"
|
|
[Frame]: #class-frame "Frame"
|
|
[ConsoleMessage]: #class-consolemessage "ConsoleMessage"
|
|
[ChildProcess]: https://nodejs.org/api/child_process.html "ChildProcess"
|
|
[Coverage]: #class-coverage "Coverage"
|
|
[iterator]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols "Iterator"
|
|
[Response]: #class-response "Response"
|
|
[Request]: #class-request "Request"
|
|
[Browser]: #class-browser "Browser"
|
|
[Body]: #class-body "Body"
|
|
[Element]: https://developer.mozilla.org/en-US/docs/Web/API/element "Element"
|
|
[Keyboard]: #class-keyboard "Keyboard"
|
|
[Dialog]: #class-dialog "Dialog"
|
|
[JSHandle]: #class-jshandle "JSHandle"
|
|
[ExecutionContext]: #class-executioncontext "ExecutionContext"
|
|
[Mouse]: #class-mouse "Mouse"
|
|
[Map]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map "Map"
|
|
[selector]: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors "selector"
|
|
[Tracing]: #class-tracing "Tracing"
|
|
[ElementHandle]: #class-elementhandle "ElementHandle"
|
|
[UIEvent.detail]: https://developer.mozilla.org/en-US/docs/Web/API/UIEvent/detail "UIEvent.detail"
|
|
[Serializable]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#Description "Serializable"
|
|
[Touchscreen]: #class-touchscreen "Touchscreen"
|
|
[Target]: #class-target "Target"
|
|
[USKeyboardLayout]: ../lib/USKeyboardLayout.js "USKeyboardLayout"
|