54 KiB
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| Page |
Page class
Page provides methods to interact with a single tab or extension background page in Chromium.
:::note
One Browser instance might have multiple Page instances.
:::
Signature:
export declare class Page extends EventEmitter
Extends: EventEmitter
Remarks
The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the Page class.
Example 1
This example creates a page, navigates it to a URL, and then saves a screenshot:
const puppeteer = require('puppeteer');
(async () => {
const browser = await puppeteer.launch();
const page = await browser.newPage();
await page.goto('https://example.com');
await page.screenshot({path: 'screenshot.png'});
await browser.close();
})();
The Page class extends from Puppeteer's EventEmitter class and will emit various events which are documented in the PageEmittedEvents enum.
Example 2
This example logs a message for a single page load event:
page.once('load', () => console.log('Page loaded!'));
To unsubscribe from events use the Page.off() method:
function logRequest(interceptedRequest) {
console.log('A request was made:', interceptedRequest.url());
}
page.on('request', logRequest);
// Sometime later...
page.off('request', logRequest);
Properties
| Property | Modifiers | Type | Description |
|---|---|---|---|
| accessibility | Accessibility | ||
| coverage | Coverage | ||
| keyboard | Keyboard | ||
| mouse | Mouse | ||
| touchscreen | Touchscreen | ||
| tracing | Tracing |
Methods
| Method | Modifiers | Description |
|---|---|---|
| $(selector) | Runs document.querySelector within the page. If no element matches the selector, the return value resolves to null. |
|
| $(selector) | ||
| $$(selector) | The method runs document.querySelectorAll within the page. If no elements match the selector, the return value resolves to []. |
|
| $$(selector) | ||
| $$eval(selector, pageFunction, args) | This method runs Array.from(document.querySelectorAll(selector)) within the page and passes the result as the first argument to the pageFunction. |
|
| $$eval(selector, pageFunction, args) | ||
| $eval(selector, pageFunction, args) | This method runs document.querySelector within the page and passes the result as the first argument to the pageFunction. |
|
| $eval(selector, pageFunction, args) | ||
| $x(expression) | The method evaluates the XPath expression relative to the page document as its context node. If there are no such elements, the method resolves to an empty array. | |
| addScriptTag(options) | Adds a <script> tag into the page with the desired URL or content. |
|
| addStyleTag(options) | Adds a <link rel="stylesheet"> tag into the page with the desired URL or a <style type="text/css"> tag with the content. |
|
| authenticate(credentials) | Provide credentials for HTTP authentication. |
|
| bringToFront() | Brings page to front (activates tab). | |
| browser() | Get the browser the page belongs to. | |
| browserContext() | Get the browser context that the page belongs to. | |
| click(selector, options) | This method fetches an element with selector, scrolls it into view if needed, and then uses Page.mouse to click in the center of the element. If there's no element matching selector, the method throws an error. |
|
| close(options) | ||
| content() | ||
| cookies(urls) | 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. | |
| createPDFStream(options) | Generates a PDF of the page with the print CSS media type. |
|
| deleteCookie(cookies) | ||
| emulate(options) | Emulates given device metrics and user agent. | |
| emulateCPUThrottling(factor) | Enables CPU throttling to emulate slow CPUs. | |
| emulateIdleState(overrides) | Emulates the idle state. If no arguments set, clears idle state emulation. | |
| emulateMediaFeatures(features) | ||
| emulateMediaType(type) | ||
| emulateNetworkConditions(networkConditions) | ||
| emulateTimezone(timezoneId) | ||
| emulateVisionDeficiency(type) | Simulates the given vision deficiency on the page. | |
| evaluate(pageFunction, args) | ||
| evaluateHandle(pageFunction, args) | ||
| evaluateOnNewDocument(pageFunction, args) | 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 the JavaScript environment, e.g. to seed |
|
| exposeFunction(name, pptrFunction) | The method adds a function called If the puppeteerFunction returns a NOTE: Functions installed via |
|
| focus(selector) | This method fetches an element with selector and focuses it. If there's no element matching selector, the method throws an error. |
|
| frames() | ||
| goBack(options) | This method navigate to the previous page in history. | |
| goForward(options) | This method navigate to the next page in history. | |
| goto(url, options) | ||
| hover(selector) | This method fetches an element with selector, scrolls it into view if needed, and then uses Page.mouse to hover over the center of the element. If there's no element matching selector, the method throws an error. |
|
| isClosed() | Indicates that the page has been closed. | |
| isDragInterceptionEnabled() | ||
| isJavaScriptEnabled() | ||
| mainFrame() | ||
| metrics() | ||
| off(eventName, handler) | ||
| on(eventName, handler) | Listen to page events. :::note This method exists to define event typings and handle proper wireup of cooperative request interception. Actual event listening and dispatching is delegated to EventEmitter. ::: |
|
| once(eventName, handler) | ||
| pdf(options) | ||
| queryObjects(prototypeHandle) | This method iterates the JavaScript heap and finds all objects with the given prototype. | |
| reload(options) | ||
| screenshot(options) | ||
| select(selector, values) | 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. |
|
| setBypassCSP(enabled) | Toggles bypassing page's Content-Security-Policy. | |
| setCacheEnabled(enabled) | Toggles ignoring cache for each request based on the enabled state. By default, caching is enabled. | |
| setContent(html, options) | ||
| setCookie(cookies) | ||
| setDefaultNavigationTimeout(timeout) | This setting will change the default maximum navigation time for the following methods and related shortcuts: |
|
| setDefaultTimeout(timeout) | ||
| setDragInterception(enabled) | ||
| setExtraHTTPHeaders(headers) | The extra HTTP headers will be sent with every request the page initiates. NOTE: All HTTP header names are lowercased. (HTTP headers are case-insensitive, so this shouldn’t impact your server code.) NOTE: page.setExtraHTTPHeaders does not guarantee the order of headers in the outgoing requests. | |
| setGeolocation(options) | Sets the page's geolocation. | |
| setJavaScriptEnabled(enabled) | ||
| setOfflineMode(enabled) | ||
| setRequestInterception(value) | ||
| setUserAgent(userAgent, userAgentMetadata) | ||
| setViewport(viewport) |
In the case of multiple pages in a single browser, each page can have its own viewport size. |
|
| tap(selector) | This method fetches an element with selector, scrolls it into view if needed, and then uses Page.touchscreen to tap in the center of the element. If there's no element matching selector, the method throws an error. |
|
| target() | ||
| title() | ||
| type(selector, text, options) | Sends a To press a special key, like |
|
| url() | ||
| viewport() | ||
| waitForFileChooser(options) | This method is typically coupled with an action that triggers file choosing. :::caution This must be called before the file chooser is launched. It will not return a currently active file chooser. ::: |
|
| waitForFrame(urlOrPredicate, options) | ||
| waitForFunction(pageFunction, options, args) | Waits for a function to finish evaluating in the page's context. | |
| waitForNavigation(options) | Waits for the page to navigate to a new URL or to reload. It is useful when you run code that will indirectly cause the page to navigate. | |
| waitForNetworkIdle(options) | ||
| waitForRequest(urlOrPredicate, options) | ||
| waitForResponse(urlOrPredicate, options) | ||
| waitForSelector(selector, options) | Wait for the This method works across navigations: |
const puppeteer = require('puppeteer');
(async () => {
const browser = await puppeteer.launch();
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();
})();
| | waitForSelector(selector, options) | | | | waitForTimeout(milliseconds) | | Causes your script to wait for the given number of milliseconds. | | waitForXPath(xpath, options) | |
Wait for the xpath to appear in page. If at the moment of calling the method the xpath already exists, the method will return immediately. If the xpath doesn't appear after the timeout milliseconds of waiting, the function will throw.
This method works across navigation
const puppeteer = require('puppeteer');
(async () => {
const browser = await puppeteer.launch();
const page = await browser.newPage();
let currentURL;
page
.waitForXPath('//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();
})();
| | workers() | | |