Page provides methods to interact with a single tab or [extension background page](https://developer.chrome.com/extensions/background_pages) in the browser.
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:
The Page class extends from Puppeteer's [EventEmitter](./puppeteer.eventemitter.md) class and will emit various events which are documented in the [PageEvent](./puppeteer.pageevent.md) enum.
The Accessibility class provides methods for inspecting the browser's accessibility tree. The accessibility tree is used by assistive technology such as [screen readers](https://en.wikipedia.org/wiki/Screen_reader) or [switches](https://en.wikipedia.org/wiki/Switch_access).
Accessibility is a very platform-specific thing. On different platforms, there are different screen readers that might have wildly different output.
Blink - Chrome's rendering engine - has a concept of "accessibility tree", which is then translated into different platform-specific APIs. Accessibility namespace gives users access to the Blink Accessibility Tree.
Most of the accessibility tree gets filtered out when converting from Blink AX Tree to Platform-specific AX-Tree or by assistive technologies themselves. By default, Puppeteer tries to approximate this filtering, exposing only the "interesting" nodes of the tree.
The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the `Accessibility` class.
To output coverage in a form consumable by [Istanbul](https://github.com/istanbuljs), see [puppeteer-to-istanbul](https://github.com/istanbuljs/puppeteer-to-istanbul).
Keyboard provides an api for managing a virtual keyboard. The high level api is [Keyboard.type()](./puppeteer.keyboard.type.md), which takes raw characters and generates proper keydown, keypress/input, and keyup events on your page.
For finer control, you can use [Keyboard.down()](./puppeteer.keyboard.down.md), [Keyboard.up()](./puppeteer.keyboard.up.md), and [Keyboard.sendCharacter()](./puppeteer.keyboard.sendcharacter.md) to manually fire events as if they were generated from a real keyboard.
On macOS, keyboard shortcuts like `⌘ A` -> Select All do not work. See [\#1313](https://github.com/puppeteer/puppeteer/issues/1313).
The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the `Keyboard` class.
Every `page` object has its own Mouse, accessible with \[`page.mouse`\](\#pagemouse).
The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the `Mouse` class.
You can use `tracing.start` and `tracing.stop` to create a trace file which can be opened in Chrome DevTools or [timeline viewer](https://chromedevtools.github.io/timeline-viewer/).
The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the `Tracing` class.
This method fetches an element with `selector`, scrolls it into view if needed, and then uses [Page.mouse](./puppeteer.page.md#mouse) to click in the center of the element. If there's no element matching `selector`, the method throws an error.
Bear in mind that if `click()` triggers a navigation event and there's a separate `page.waitForNavigation()` promise to be resolved, you may end up with a race condition that yields unexpected results. The correct pattern for click and wait for navigation is the following:
```ts
const [response] = await Promise.all([
page.waitForNavigation(waitOptions),
page.click(selector, clickOptions),
]);
```
Shortcut for [page.mainFrame().click(selector\[, options\])](./puppeteer.frame.click.md).
To generate a PDF with the `screen` media type, call [\`page.emulateMediaType('screen')\`](./puppeteer.page.emulatemediatype.md) before calling `page.pdf()`.
By default, `page.pdf()` generates a pdf with modified colors for printing. Use the [\`-webkit-print-color-adjust\`](https://developer.mozilla.org/en-US/docs/Web/CSS/-webkit-print-color-adjust) property to force rendering of exact colors.
This method is a shortcut for calling two methods: [Page.setUserAgent()](./puppeteer.page.setuseragent.md) and [Page.setViewport()](./puppeteer.page.setviewport.md).
This method will resize the page. A lot of websites don't expect phones to change size, so you should emulate before navigating to the page.
This does not affect WebSockets and WebRTC PeerConnections (see https://crbug.com/563644). To set the page offline, you can use [Page.setOfflineMode()](./puppeteer.page.setofflinemode.md).
A list of predefined network conditions can be used by importing [PredefinedNetworkConditions](./puppeteer.predefinednetworkconditions.md).
The only difference between [page.evaluate](./puppeteer.page.evaluate.md) and `page.evaluateHandle` is that `evaluateHandle` will return the value wrapped in an in-page object.
If the function passed to `page.evaluateHandle` returns a Promise, the function will wait for the promise to resolve and return its value.
You can pass a string instead of a function (although functions are recommended as they are easier to debug and use with TypeScript):
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 `Math.random`.
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.
In headless shell, this method will not throw an error when any valid HTTP status code is returned by the remote server, including 404 "Not Found" and 500 "Internal Server Error". The status code for such responses can be retrieved by calling [HTTPResponse.status()](./puppeteer.httpresponse.status.md).
This method fetches an element with `selector`, scrolls it into view if needed, and then uses [Page.mouse](./puppeteer.page.md#mouse) to hover over the center of the element. If there's no element matching `selector`, the method throws an error.
We no longer support intercepting drag payloads. Use the new drag APIs found on [ElementHandle](./puppeteer.elementhandle.md) to drag (or just use the [Page.mouse](./puppeteer.page.md#mouse)).
To generate a PDF with the `screen` media type, call [\`page.emulateMediaType('screen')\`](./puppeteer.page.emulatemediatype.md) before calling `page.pdf()`.
By default, `page.pdf()` generates a pdf with modified colors for printing. Use the [\`-webkit-print-color-adjust\`](https://developer.mozilla.org/en-US/docs/Web/CSS/-webkit-print-color-adjust) property to force rendering of exact colors.
The method removes a previously added function via $[Page.exposeFunction()](./puppeteer.page.exposefunction.md) called `name` from the page's `window` object.
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.
NOTE: CSP bypassing happens at the moment of CSP initialization rather than evaluation. Usually, this means that `page.setBypassCSP` should be called before navigating to the domain.
We no longer support intercepting drag payloads. Use the new drag APIs found on [ElementHandle](./puppeteer.elementhandle.md) to drag (or just use the [Page.mouse](./puppeteer.page.md#mouse)).
Consider using [BrowserContext.overridePermissions()](./puppeteer.browsercontext.overridepermissions.md) to grant permissions for the page to read its geolocation.
Activating request interception enables [HTTPRequest.abort()](./puppeteer.httprequest.abort.md), [HTTPRequest.continue()](./puppeteer.httprequest.continue.md) and [HTTPRequest.respond()](./puppeteer.httprequest.respond.md) methods. This provides the capability to modify network requests that are made by a page.
Once request interception is enabled, every request will stall unless it's continued, responded or aborted; or completed using the browser cache.
`page.setViewport` will resize the page. A lot of websites don't expect phones to change size, so you should set the viewport before navigating to the page.
In the case of multiple pages in a single browser, each page can have its own viewport size.
This method fetches an element with `selector`, scrolls it into view if needed, and then uses [Page.touchscreen](./puppeteer.page.md#touchscreen) to tap in the center of the element. If there's no element matching `selector`, the method throws an error.
This is either the viewport set with the previous [Page.setViewport()](./puppeteer.page.setviewport.md) call or the default viewport set via [BrowserConnectOptions.defaultViewport](./puppeteer.browserconnectoptions.md#defaultviewport).
-`timeout`: Maximum wait time in milliseconds, defaults to `30` seconds, pass `0` to disable the timeout. The default value can be changed by using the [Page.setDefaultTimeout()](./puppeteer.page.setdefaulttimeout.md) method.
-`timeout`: Maximum wait time in milliseconds, defaults to `30` seconds, pass `0` to disable the timeout. The default value can be changed by using the [Page.setDefaultTimeout()](./puppeteer.page.setdefaulttimeout.md) method.
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.
The optional Parameter in Arguments `options` are:
-`visible`: A 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`: 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`: maximum time to wait for in milliseconds. Defaults to `30000` (30 seconds). Pass `0` to disable timeout. The default value can be changed by using the [Page.setDefaultTimeout()](./puppeteer.page.setdefaulttimeout.md) method.
