2a403d1973
* fix: added script * fix: updated script * fix: updated script * fix: added comment * fix: added comments * fix: connection method to public * fix: removed incorrect tags * fix: some of the warnings
3221 lines
106 KiB
TypeScript
3221 lines
106 KiB
TypeScript
/**
|
||
* Copyright 2017 Google Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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||
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import type { Readable } from 'stream';
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import { EventEmitter } from './EventEmitter.js';
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import {
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Connection,
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CDPSession,
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CDPSessionEmittedEvents,
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} from './Connection.js';
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import { Dialog } from './Dialog.js';
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import { EmulationManager } from './EmulationManager.js';
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import {
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Frame,
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FrameManager,
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FrameManagerEmittedEvents,
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} from './FrameManager.js';
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import { Keyboard, Mouse, Touchscreen, MouseButton } from './Input.js';
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import { Tracing } from './Tracing.js';
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import { assert } from './assert.js';
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import { helper, debugError } from './helper.js';
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import { Coverage } from './Coverage.js';
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import { WebWorker } from './WebWorker.js';
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import { Browser, BrowserContext } from './Browser.js';
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import { Target } from './Target.js';
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import { createJSHandle, JSHandle, ElementHandle } from './JSHandle.js';
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import { Viewport } from './PuppeteerViewport.js';
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import {
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Credentials,
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NetworkConditions,
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NetworkManagerEmittedEvents,
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} from './NetworkManager.js';
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import { HTTPRequest } from './HTTPRequest.js';
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import { HTTPResponse } from './HTTPResponse.js';
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import { Accessibility } from './Accessibility.js';
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import { TimeoutSettings } from './TimeoutSettings.js';
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import { FileChooser } from './FileChooser.js';
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import { ConsoleMessage, ConsoleMessageType } from './ConsoleMessage.js';
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import { PuppeteerLifeCycleEvent } from './LifecycleWatcher.js';
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||
import { Protocol } from 'devtools-protocol';
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import {
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||
SerializableOrJSHandle,
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EvaluateHandleFn,
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WrapElementHandle,
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EvaluateFn,
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EvaluateFnReturnType,
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UnwrapPromiseLike,
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} from './EvalTypes.js';
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import { PDFOptions, paperFormats } from './PDFOptions.js';
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import { isNode } from '../environment.js';
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||
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||
/**
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* @public
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*/
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export interface Metrics {
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Timestamp?: number;
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||
Documents?: number;
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Frames?: number;
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JSEventListeners?: number;
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Nodes?: number;
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||
LayoutCount?: number;
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||
RecalcStyleCount?: number;
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||
LayoutDuration?: number;
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||
RecalcStyleDuration?: number;
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||
ScriptDuration?: number;
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TaskDuration?: number;
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||
JSHeapUsedSize?: number;
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JSHeapTotalSize?: number;
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}
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||
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||
/**
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||
* @public
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*/
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||
export interface WaitTimeoutOptions {
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||
/**
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||
* Maximum wait time in milliseconds, defaults to 30 seconds, pass `0` to
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* disable the timeout.
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||
*
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||
* @remarks
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||
* The default value can be changed by using the
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||
* {@link Page.setDefaultTimeout} method.
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||
*/
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||
timeout?: number;
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||
}
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||
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||
/**
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||
* @public
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||
*/
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||
export interface WaitForOptions {
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||
/**
|
||
* Maximum wait time in milliseconds, defaults to 30 seconds, pass `0` to
|
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* disable the timeout.
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||
*
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||
* @remarks
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||
* The default value can be changed by using the
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||
* {@link Page.setDefaultTimeout} or {@link Page.setDefaultNavigationTimeout}
|
||
* methods.
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||
*/
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||
timeout?: number;
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||
waitUntil?: PuppeteerLifeCycleEvent | PuppeteerLifeCycleEvent[];
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||
}
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||
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||
/**
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||
* @public
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||
*/
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export interface GeolocationOptions {
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/**
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* Latitude between -90 and 90.
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*/
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longitude: number;
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/**
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* Longitude between -180 and 180.
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*/
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latitude: number;
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||
/**
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||
* Optional non-negative accuracy value.
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*/
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accuracy?: number;
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}
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||
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||
/**
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||
* @public
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||
*/
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export interface MediaFeature {
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name: string;
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value: string;
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}
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||
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/**
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* @public
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*/
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export interface ScreenshotClip {
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x: number;
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y: number;
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width: number;
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height: number;
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}
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||
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/**
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* @public
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*/
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export interface ScreenshotOptions {
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/**
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* @defaultValue 'png'
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*/
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type?: 'png' | 'jpeg';
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/**
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* The file path to save the image to. The screenshot type will be inferred
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* from file extension. If path is a relative path, then it is resolved
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* relative to current working directory. If no path is provided, the image
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* won't be saved to the disk.
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*/
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path?: string;
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/**
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* When true, takes a screenshot of the full page.
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* @defaultValue false
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*/
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fullPage?: boolean;
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/**
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* An object which specifies the clipping region of the page.
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*/
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clip?: ScreenshotClip;
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/**
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* Quality of the image, between 0-100. Not applicable to `png` images.
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*/
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quality?: number;
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/**
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* Hides default white background and allows capturing screenshots with transparency.
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* @defaultValue false
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*/
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omitBackground?: boolean;
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/**
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* Encoding of the image.
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* @defaultValue 'binary'
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*/
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encoding?: 'base64' | 'binary';
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/**
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* If you need a screenshot bigger than the Viewport
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* @defaultValue true
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*/
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captureBeyondViewport?: boolean;
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}
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/**
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* All the events that a page instance may emit.
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*
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* @public
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*/
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export const enum PageEmittedEvents {
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/** Emitted when the page closes. */
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Close = 'close',
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/**
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* Emitted when JavaScript within the page calls one of console API methods,
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* e.g. `console.log` or `console.dir`. Also emitted if the page throws an
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* error or a warning.
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*
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* @remarks
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*
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* A `console` event provides a {@link ConsoleMessage} representing the
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* console message that was logged.
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*
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* @example
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* An example of handling `console` event:
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* ```js
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* page.on('console', msg => {
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* for (let i = 0; i < msg.args().length; ++i)
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* console.log(`${i}: ${msg.args()[i]}`);
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* });
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* page.evaluate(() => console.log('hello', 5, {foo: 'bar'}));
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* ```
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*/
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Console = 'console',
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/**
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* Emitted when a JavaScript dialog appears, such as `alert`, `prompt`,
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* `confirm` or `beforeunload`. Puppeteer can respond to the dialog via
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* {@link Dialog.accept} or {@link Dialog.dismiss}.
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*/
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Dialog = 'dialog',
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/**
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* Emitted when the JavaScript
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* {@link https://developer.mozilla.org/en-US/docs/Web/Events/DOMContentLoaded | DOMContentLoaded } event is dispatched.
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*/
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DOMContentLoaded = 'domcontentloaded',
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/**
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* Emitted when the page crashes. Will contain an `Error`.
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*/
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Error = 'error',
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/** Emitted when a frame is attached. Will contain a {@link Frame}. */
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FrameAttached = 'frameattached',
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/** Emitted when a frame is detached. Will contain a {@link Frame}. */
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FrameDetached = 'framedetached',
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/** Emitted when a frame is navigated to a new URL. Will contain a {@link Frame}. */
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FrameNavigated = 'framenavigated',
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/**
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* Emitted when the JavaScript
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* {@link https://developer.mozilla.org/en-US/docs/Web/Events/load | load}
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* event is dispatched.
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*/
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Load = 'load',
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/**
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* Emitted when the JavaScript code makes a call to `console.timeStamp`. For
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* the list of metrics see {@link Page.metrics | page.metrics}.
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*
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* @remarks
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* Contains an object with two properties:
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* - `title`: the title passed to `console.timeStamp`
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* - `metrics`: objec containing metrics as key/value pairs. The values will
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* be `number`s.
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*/
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Metrics = 'metrics',
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/**
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* Emitted when an uncaught exception happens within the page.
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* Contains an `Error`.
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*/
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PageError = 'pageerror',
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/**
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* Emitted when the page opens a new tab or window.
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*
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* Contains a {@link Page} corresponding to the popup window.
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*
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* @example
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*
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* ```js
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* const [popup] = await Promise.all([
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* new Promise(resolve => page.once('popup', resolve)),
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* page.click('a[target=_blank]'),
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* ]);
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* ```
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*
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* ```js
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* const [popup] = await Promise.all([
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* new Promise(resolve => page.once('popup', resolve)),
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* page.evaluate(() => window.open('https://example.com')),
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* ]);
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* ```
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*/
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Popup = 'popup',
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/**
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* Emitted when a page issues a request and contains a {@link HTTPRequest}.
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*
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* @remarks
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* The object is readonly. See {@link Page.setRequestInterception} for intercepting
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* and mutating requests.
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*/
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Request = 'request',
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/**
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* Emitted when a request ended up loading from cache. Contains a {@link HTTPRequest}.
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||
*
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* @remarks
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* For certain requests, might contain undefined.
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* {@link https://crbug.com/750469}
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*/
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RequestServedFromCache = 'requestservedfromcache',
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/**
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* Emitted when a request fails, for example by timing out.
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*
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* Contains a {@link HTTPRequest}.
|
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*
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* @remarks
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*
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* NOTE: HTTP Error responses, such as 404 or 503, are still successful
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* responses from HTTP standpoint, so request will complete with
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* `requestfinished` event and not with `requestfailed`.
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*/
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RequestFailed = 'requestfailed',
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/**
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* Emitted when a request finishes successfully. Contains a {@link HTTPRequest}.
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||
*/
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RequestFinished = 'requestfinished',
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/**
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||
* Emitted when a response is received. Contains a {@link HTTPResponse}.
|
||
*/
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Response = 'response',
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||
/**
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||
* Emitted when a dedicated
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* {@link https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API | WebWorker}
|
||
* is spawned by the page.
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||
*/
|
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WorkerCreated = 'workercreated',
|
||
/**
|
||
* Emitted when a dedicated
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||
* {@link https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API | WebWorker}
|
||
* is destroyed by the page.
|
||
*/
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WorkerDestroyed = 'workerdestroyed',
|
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}
|
||
|
||
/**
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||
* Denotes the objects received by callback functions for page events.
|
||
*
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||
* See {@link PageEmittedEvents} for more detail on the events and when they are
|
||
* emitted.
|
||
* @public
|
||
*/
|
||
export interface PageEventObject {
|
||
close: never;
|
||
console: ConsoleMessage;
|
||
dialog: Dialog;
|
||
domcontentloaded: never;
|
||
error: Error;
|
||
frameattached: Frame;
|
||
framedetached: Frame;
|
||
framenavigated: Frame;
|
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load: never;
|
||
metrics: { title: string; metrics: Metrics };
|
||
pageerror: Error;
|
||
popup: Page;
|
||
request: HTTPRequest;
|
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response: HTTPResponse;
|
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requestfailed: HTTPRequest;
|
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requestfinished: HTTPRequest;
|
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requestservedfromcache: HTTPRequest;
|
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workercreated: WebWorker;
|
||
workerdestroyed: WebWorker;
|
||
}
|
||
|
||
class ScreenshotTaskQueue {
|
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_chain: Promise<Buffer | string | void>;
|
||
|
||
constructor() {
|
||
this._chain = Promise.resolve<Buffer | string | void>(undefined);
|
||
}
|
||
|
||
public postTask(
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||
task: () => Promise<Buffer | string>
|
||
): Promise<Buffer | string | void> {
|
||
const result = this._chain.then(task);
|
||
this._chain = result.catch(() => {});
|
||
return result;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Page provides methods to interact with a single tab or
|
||
* {@link https://developer.chrome.com/extensions/background_pages | extension background page} in Chromium.
|
||
*
|
||
* @remarks
|
||
*
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||
* One Browser instance might have multiple Page instances.
|
||
*
|
||
* @example
|
||
* This example creates a page, navigates it to a URL, and then * saves a screenshot:
|
||
* ```js
|
||
* 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 {@link EventEmitter} class and will
|
||
* emit various events which are documented in the {@link PageEmittedEvents} enum.
|
||
*
|
||
* @example
|
||
* This example logs a message for a single page `load` event:
|
||
* ```js
|
||
* page.once('load', () => console.log('Page loaded!'));
|
||
* ```
|
||
*
|
||
* To unsubscribe from events use the `off` method:
|
||
*
|
||
* ```js
|
||
* function logRequest(interceptedRequest) {
|
||
* console.log('A request was made:', interceptedRequest.url());
|
||
* }
|
||
* page.on('request', logRequest);
|
||
* // Sometime later...
|
||
* page.off('request', logRequest);
|
||
* ```
|
||
* @public
|
||
*/
|
||
export class Page extends EventEmitter {
|
||
/**
|
||
* @internal
|
||
*/
|
||
static async create(
|
||
client: CDPSession,
|
||
target: Target,
|
||
ignoreHTTPSErrors: boolean,
|
||
defaultViewport: Viewport | null
|
||
): Promise<Page> {
|
||
const page = new Page(client, target, ignoreHTTPSErrors);
|
||
await page._initialize();
|
||
if (defaultViewport) await page.setViewport(defaultViewport);
|
||
return page;
|
||
}
|
||
|
||
private _closed = false;
|
||
private _client: CDPSession;
|
||
private _target: Target;
|
||
private _keyboard: Keyboard;
|
||
private _mouse: Mouse;
|
||
private _timeoutSettings = new TimeoutSettings();
|
||
private _touchscreen: Touchscreen;
|
||
private _accessibility: Accessibility;
|
||
private _frameManager: FrameManager;
|
||
private _emulationManager: EmulationManager;
|
||
private _tracing: Tracing;
|
||
private _pageBindings = new Map<string, Function>();
|
||
private _coverage: Coverage;
|
||
private _javascriptEnabled = true;
|
||
private _viewport: Viewport | null;
|
||
private _screenshotTaskQueue: ScreenshotTaskQueue;
|
||
private _workers = new Map<string, WebWorker>();
|
||
// TODO: improve this typedef - it's a function that takes a file chooser or
|
||
// something?
|
||
private _fileChooserInterceptors = new Set<Function>();
|
||
|
||
private _disconnectPromise?: Promise<Error>;
|
||
private _userDragInterceptionEnabled = false;
|
||
|
||
/**
|
||
* @internal
|
||
*/
|
||
constructor(client: CDPSession, target: Target, ignoreHTTPSErrors: boolean) {
|
||
super();
|
||
this._client = client;
|
||
this._target = target;
|
||
this._keyboard = new Keyboard(client);
|
||
this._mouse = new Mouse(client, this._keyboard);
|
||
this._touchscreen = new Touchscreen(client, this._keyboard);
|
||
this._accessibility = new Accessibility(client);
|
||
this._frameManager = new FrameManager(
|
||
client,
|
||
this,
|
||
ignoreHTTPSErrors,
|
||
this._timeoutSettings
|
||
);
|
||
this._emulationManager = new EmulationManager(client);
|
||
this._tracing = new Tracing(client);
|
||
this._coverage = new Coverage(client);
|
||
this._screenshotTaskQueue = new ScreenshotTaskQueue();
|
||
this._viewport = null;
|
||
|
||
client.on('Target.attachedToTarget', (event) => {
|
||
if (
|
||
event.targetInfo.type !== 'worker' &&
|
||
event.targetInfo.type !== 'iframe'
|
||
) {
|
||
// If we don't detach from service workers, they will never die.
|
||
// We still want to attach to workers for emitting events.
|
||
// We still want to attach to iframes so sessions may interact with them.
|
||
// We detach from all other types out of an abundance of caution.
|
||
// See https://source.chromium.org/chromium/chromium/src/+/master:content/browser/devtools/devtools_agent_host_impl.cc?q=f:devtools%20-f:out%20%22::kTypePage%5B%5D%22&ss=chromium
|
||
// for the complete list of available types.
|
||
client
|
||
.send('Target.detachFromTarget', {
|
||
sessionId: event.sessionId,
|
||
})
|
||
.catch(debugError);
|
||
return;
|
||
}
|
||
const session = Connection.fromSession(client).session(event.sessionId);
|
||
const worker = new WebWorker(
|
||
session,
|
||
event.targetInfo.url,
|
||
this._addConsoleMessage.bind(this),
|
||
this._handleException.bind(this)
|
||
);
|
||
this._workers.set(event.sessionId, worker);
|
||
this.emit(PageEmittedEvents.WorkerCreated, worker);
|
||
});
|
||
client.on('Target.detachedFromTarget', (event) => {
|
||
const worker = this._workers.get(event.sessionId);
|
||
if (!worker) return;
|
||
this._workers.delete(event.sessionId);
|
||
this.emit(PageEmittedEvents.WorkerDestroyed, worker);
|
||
});
|
||
|
||
this._frameManager.on(FrameManagerEmittedEvents.FrameAttached, (event) =>
|
||
this.emit(PageEmittedEvents.FrameAttached, event)
|
||
);
|
||
this._frameManager.on(FrameManagerEmittedEvents.FrameDetached, (event) =>
|
||
this.emit(PageEmittedEvents.FrameDetached, event)
|
||
);
|
||
this._frameManager.on(FrameManagerEmittedEvents.FrameNavigated, (event) =>
|
||
this.emit(PageEmittedEvents.FrameNavigated, event)
|
||
);
|
||
|
||
const networkManager = this._frameManager.networkManager();
|
||
networkManager.on(NetworkManagerEmittedEvents.Request, (event) =>
|
||
this.emit(PageEmittedEvents.Request, event)
|
||
);
|
||
networkManager.on(
|
||
NetworkManagerEmittedEvents.RequestServedFromCache,
|
||
(event) => this.emit(PageEmittedEvents.RequestServedFromCache, event)
|
||
);
|
||
networkManager.on(NetworkManagerEmittedEvents.Response, (event) =>
|
||
this.emit(PageEmittedEvents.Response, event)
|
||
);
|
||
networkManager.on(NetworkManagerEmittedEvents.RequestFailed, (event) =>
|
||
this.emit(PageEmittedEvents.RequestFailed, event)
|
||
);
|
||
networkManager.on(NetworkManagerEmittedEvents.RequestFinished, (event) =>
|
||
this.emit(PageEmittedEvents.RequestFinished, event)
|
||
);
|
||
this._fileChooserInterceptors = new Set();
|
||
|
||
client.on('Page.domContentEventFired', () =>
|
||
this.emit(PageEmittedEvents.DOMContentLoaded)
|
||
);
|
||
client.on('Page.loadEventFired', () => this.emit(PageEmittedEvents.Load));
|
||
client.on('Runtime.consoleAPICalled', (event) => this._onConsoleAPI(event));
|
||
client.on('Runtime.bindingCalled', (event) => this._onBindingCalled(event));
|
||
client.on('Page.javascriptDialogOpening', (event) => this._onDialog(event));
|
||
client.on('Runtime.exceptionThrown', (exception) =>
|
||
this._handleException(exception.exceptionDetails)
|
||
);
|
||
client.on('Inspector.targetCrashed', () => this._onTargetCrashed());
|
||
client.on('Performance.metrics', (event) => this._emitMetrics(event));
|
||
client.on('Log.entryAdded', (event) => this._onLogEntryAdded(event));
|
||
client.on('Page.fileChooserOpened', (event) => this._onFileChooser(event));
|
||
this._target._isClosedPromise.then(() => {
|
||
this.emit(PageEmittedEvents.Close);
|
||
this._closed = true;
|
||
});
|
||
}
|
||
|
||
private async _initialize(): Promise<void> {
|
||
await Promise.all([
|
||
this._frameManager.initialize(),
|
||
this._client.send('Target.setAutoAttach', {
|
||
autoAttach: true,
|
||
waitForDebuggerOnStart: false,
|
||
flatten: true,
|
||
}),
|
||
this._client.send('Performance.enable'),
|
||
this._client.send('Log.enable'),
|
||
]);
|
||
}
|
||
|
||
private async _onFileChooser(
|
||
event: Protocol.Page.FileChooserOpenedEvent
|
||
): Promise<void> {
|
||
if (!this._fileChooserInterceptors.size) return;
|
||
const frame = this._frameManager.frame(event.frameId);
|
||
const context = await frame.executionContext();
|
||
const element = await context._adoptBackendNodeId(event.backendNodeId);
|
||
const interceptors = Array.from(this._fileChooserInterceptors);
|
||
this._fileChooserInterceptors.clear();
|
||
const fileChooser = new FileChooser(element, event);
|
||
for (const interceptor of interceptors) interceptor.call(null, fileChooser);
|
||
}
|
||
|
||
/**
|
||
* @returns `true` if the page has JavaScript enabled, `false` otherwise.
|
||
*/
|
||
public isJavaScriptEnabled(): boolean {
|
||
return this._javascriptEnabled;
|
||
}
|
||
|
||
/**
|
||
* 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.
|
||
public on<K extends keyof PageEventObject>(
|
||
eventName: K,
|
||
handler: (event: PageEventObject[K]) => void
|
||
): EventEmitter {
|
||
if (eventName === 'request') {
|
||
return super.on(eventName, (event: HTTPRequest) => {
|
||
event.enqueueInterceptAction(() =>
|
||
handler(event as PageEventObject[K])
|
||
);
|
||
});
|
||
}
|
||
return super.on(eventName, handler);
|
||
}
|
||
|
||
public once<K extends keyof PageEventObject>(
|
||
eventName: K,
|
||
handler: (event: PageEventObject[K]) => void
|
||
): EventEmitter {
|
||
// Note: this method only exists to define the types; we delegate the impl
|
||
// to EventEmitter.
|
||
return super.once(eventName, handler);
|
||
}
|
||
|
||
/**
|
||
* This method is typically coupled with an action that triggers file
|
||
* choosing. The following example clicks a button that issues a file chooser
|
||
* and then responds with `/tmp/myfile.pdf` as if a user has selected this file.
|
||
*
|
||
* ```js
|
||
* const [fileChooser] = await Promise.all([
|
||
* page.waitForFileChooser(),
|
||
* page.click('#upload-file-button'),
|
||
* // some button that triggers file selection
|
||
* ]);
|
||
* await fileChooser.accept(['/tmp/myfile.pdf']);
|
||
* ```
|
||
*
|
||
* NOTE: This must be called before the file chooser is launched. It will not
|
||
* return a currently active file chooser.
|
||
* @param options - Optional waiting parameters
|
||
* @returns Resolves after a page requests a file picker.
|
||
* @remarks
|
||
* NOTE: In non-headless Chromium, this method results in the native file picker
|
||
* dialog `not showing up` for the user.
|
||
*/
|
||
async waitForFileChooser(
|
||
options: WaitTimeoutOptions = {}
|
||
): Promise<FileChooser> {
|
||
if (!this._fileChooserInterceptors.size)
|
||
await this._client.send('Page.setInterceptFileChooserDialog', {
|
||
enabled: true,
|
||
});
|
||
|
||
const { timeout = this._timeoutSettings.timeout() } = options;
|
||
let callback: (value: FileChooser | PromiseLike<FileChooser>) => void;
|
||
const promise = new Promise<FileChooser>((x) => (callback = x));
|
||
this._fileChooserInterceptors.add(callback);
|
||
return helper
|
||
.waitWithTimeout<FileChooser>(
|
||
promise,
|
||
'waiting for file chooser',
|
||
timeout
|
||
)
|
||
.catch((error) => {
|
||
this._fileChooserInterceptors.delete(callback);
|
||
throw error;
|
||
});
|
||
}
|
||
|
||
/**
|
||
* Sets the page's geolocation.
|
||
* @remarks
|
||
* NOTE: Consider using {@link BrowserContext.overridePermissions} to grant
|
||
* permissions for the page to read its geolocation.
|
||
* @example
|
||
* ```js
|
||
* await page.setGeolocation({latitude: 59.95, longitude: 30.31667});
|
||
* ```
|
||
*/
|
||
async setGeolocation(options: GeolocationOptions): Promise<void> {
|
||
const { longitude, latitude, accuracy = 0 } = options;
|
||
if (longitude < -180 || longitude > 180)
|
||
throw new Error(
|
||
`Invalid longitude "${longitude}": precondition -180 <= LONGITUDE <= 180 failed.`
|
||
);
|
||
if (latitude < -90 || latitude > 90)
|
||
throw new Error(
|
||
`Invalid latitude "${latitude}": precondition -90 <= LATITUDE <= 90 failed.`
|
||
);
|
||
if (accuracy < 0)
|
||
throw new Error(
|
||
`Invalid accuracy "${accuracy}": precondition 0 <= ACCURACY failed.`
|
||
);
|
||
await this._client.send('Emulation.setGeolocationOverride', {
|
||
longitude,
|
||
latitude,
|
||
accuracy,
|
||
});
|
||
}
|
||
|
||
/**
|
||
* @returns A target this page was created from.
|
||
*/
|
||
target(): Target {
|
||
return this._target;
|
||
}
|
||
|
||
/**
|
||
* Get the browser the page belongs to.
|
||
*/
|
||
browser(): Browser {
|
||
return this._target.browser();
|
||
}
|
||
|
||
/**
|
||
* Get the browser context that the page belongs to.
|
||
*/
|
||
browserContext(): BrowserContext {
|
||
return this._target.browserContext();
|
||
}
|
||
|
||
private _onTargetCrashed(): void {
|
||
this.emit('error', new Error('Page crashed!'));
|
||
}
|
||
|
||
private _onLogEntryAdded(event: Protocol.Log.EntryAddedEvent): void {
|
||
const { level, text, args, source, url, lineNumber } = event.entry;
|
||
if (args) args.map((arg) => helper.releaseObject(this._client, arg));
|
||
if (source !== 'worker')
|
||
this.emit(
|
||
PageEmittedEvents.Console,
|
||
new ConsoleMessage(level, text, [], [{ url, lineNumber }])
|
||
);
|
||
}
|
||
|
||
/**
|
||
* @returns The page's main frame.
|
||
* @remarks
|
||
* Page is guaranteed to have a main frame which persists during navigations.
|
||
*/
|
||
mainFrame(): Frame {
|
||
return this._frameManager.mainFrame();
|
||
}
|
||
|
||
get keyboard(): Keyboard {
|
||
return this._keyboard;
|
||
}
|
||
|
||
get touchscreen(): Touchscreen {
|
||
return this._touchscreen;
|
||
}
|
||
|
||
get coverage(): Coverage {
|
||
return this._coverage;
|
||
}
|
||
|
||
get tracing(): Tracing {
|
||
return this._tracing;
|
||
}
|
||
|
||
get accessibility(): Accessibility {
|
||
return this._accessibility;
|
||
}
|
||
|
||
get isDragInterceptionEnabled(): boolean {
|
||
return this._userDragInterceptionEnabled;
|
||
}
|
||
|
||
/**
|
||
* @returns An array of all frames attached to the page.
|
||
*/
|
||
frames(): Frame[] {
|
||
return this._frameManager.frames();
|
||
}
|
||
|
||
/**
|
||
* @returns all of the dedicated
|
||
* {@link https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API |
|
||
* WebWorkers}
|
||
* associated with the page.
|
||
* @remarks
|
||
* NOTE: This does not contain ServiceWorkers
|
||
*/
|
||
workers(): WebWorker[] {
|
||
return Array.from(this._workers.values());
|
||
}
|
||
|
||
/**
|
||
* @param value - Whether to enable request interception.
|
||
*
|
||
* @remarks
|
||
* Activating request interception enables {@link HTTPRequest.abort},
|
||
* {@link HTTPRequest.continue} and {@link HTTPRequest.respond} 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.
|
||
*
|
||
* @example
|
||
* An example of a naïve request interceptor that aborts all image requests:
|
||
* ```js
|
||
* const puppeteer = require('puppeteer');
|
||
* (async () => {
|
||
* const browser = await puppeteer.launch();
|
||
* 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.
|
||
*/
|
||
async setRequestInterception(value: boolean): Promise<void> {
|
||
return this._frameManager.networkManager().setRequestInterception(value);
|
||
}
|
||
|
||
/**
|
||
* @param enabled - Whether to enable drag interception.
|
||
*
|
||
* @remarks
|
||
* Activating drag interception enables the `Input.drag`,
|
||
* methods This provides the capability to capture drag events emitted
|
||
* on the page, which can then be used to simulate drag-and-drop.
|
||
*/
|
||
async setDragInterception(enabled: boolean): Promise<void> {
|
||
this._userDragInterceptionEnabled = enabled;
|
||
return this._client.send('Input.setInterceptDrags', { enabled });
|
||
}
|
||
|
||
/**
|
||
* @param enabled - When `true`, enables offline mode for the page.
|
||
*/
|
||
setOfflineMode(enabled: boolean): Promise<void> {
|
||
return this._frameManager.networkManager().setOfflineMode(enabled);
|
||
}
|
||
|
||
/**
|
||
* @param networkConditions - Passing `null` disables network condition emulation.
|
||
* @example
|
||
* ```js
|
||
* const puppeteer = require('puppeteer');
|
||
* const slow3G = puppeteer.networkConditions['Slow 3G'];
|
||
*
|
||
* (async () => {
|
||
* const browser = await puppeteer.launch();
|
||
* const page = await browser.newPage();
|
||
* await page.emulateNetworkConditions(slow3G);
|
||
* await page.goto('https://www.google.com');
|
||
* // other actions...
|
||
* await browser.close();
|
||
* })();
|
||
* ```
|
||
* @remarks
|
||
* NOTE: This does not affect WebSockets and WebRTC PeerConnections (see
|
||
* https://crbug.com/563644)
|
||
*/
|
||
emulateNetworkConditions(
|
||
networkConditions: NetworkConditions | null
|
||
): Promise<void> {
|
||
return this._frameManager
|
||
.networkManager()
|
||
.emulateNetworkConditions(networkConditions);
|
||
}
|
||
|
||
/**
|
||
* This setting will change the default maximum navigation time for the
|
||
* following methods and related shortcuts:
|
||
*
|
||
* - {@link Page.goBack | page.goBack(options)}
|
||
*
|
||
* - {@link Page.goForward | page.goForward(options)}
|
||
*
|
||
* - {@link Page.goto | page.goto(url,options)}
|
||
*
|
||
* - {@link Page.reload | page.reload(options)}
|
||
*
|
||
* - {@link Page.setContent | page.setContent(html,options)}
|
||
*
|
||
* - {@link Page.waitForNavigation | page.waitForNavigation(options)}
|
||
* @param timeout - Maximum navigation time in milliseconds.
|
||
*/
|
||
setDefaultNavigationTimeout(timeout: number): void {
|
||
this._timeoutSettings.setDefaultNavigationTimeout(timeout);
|
||
}
|
||
|
||
/**
|
||
* @param timeout - Maximum time in milliseconds.
|
||
*/
|
||
setDefaultTimeout(timeout: number): void {
|
||
this._timeoutSettings.setDefaultTimeout(timeout);
|
||
}
|
||
|
||
/**
|
||
* Runs `document.querySelector` within the page. If no element matches the
|
||
* selector, the return value resolves to `null`.
|
||
*
|
||
* @remarks
|
||
* Shortcut for {@link Frame.$ | Page.mainFrame().$(selector) }.
|
||
*
|
||
* @param selector - A `selector` to query page for
|
||
* {@link https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors | selector}
|
||
* to query page for.
|
||
*/
|
||
async $<T extends Element = Element>(
|
||
selector: string
|
||
): Promise<ElementHandle<T> | null> {
|
||
return this.mainFrame().$<T>(selector);
|
||
}
|
||
|
||
/**
|
||
* @remarks
|
||
*
|
||
* The only difference between {@link Page.evaluate | page.evaluate} and
|
||
* `page.evaluateHandle` is that `evaluateHandle` will return the value
|
||
* wrapped in an in-page object.
|
||
*
|
||
* If the function passed to `page.evaluteHandle` 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):
|
||
*
|
||
* @example
|
||
* ```
|
||
* const aHandle = await page.evaluateHandle('document')
|
||
* ```
|
||
*
|
||
* @example
|
||
* {@link JSHandle} instances can be passed as arguments to the `pageFunction`:
|
||
* ```
|
||
* const aHandle = await page.evaluateHandle(() => document.body);
|
||
* const resultHandle = await page.evaluateHandle(body => body.innerHTML, aHandle);
|
||
* console.log(await resultHandle.jsonValue());
|
||
* await resultHandle.dispose();
|
||
* ```
|
||
*
|
||
* Most of the time this function returns a {@link JSHandle},
|
||
* but if `pageFunction` returns a reference to an element,
|
||
* you instead get an {@link ElementHandle} back:
|
||
*
|
||
* @example
|
||
* ```
|
||
* const button = await page.evaluateHandle(() => document.querySelector('button'));
|
||
* // can call `click` because `button` is an `ElementHandle`
|
||
* await button.click();
|
||
* ```
|
||
*
|
||
* The TypeScript definitions assume that `evaluateHandle` returns
|
||
* a `JSHandle`, but if you know it's going to return an
|
||
* `ElementHandle`, pass it as the generic argument:
|
||
*
|
||
* ```
|
||
* const button = await page.evaluateHandle<ElementHandle>(...);
|
||
* ```
|
||
*
|
||
* @param pageFunction - a function that is run within the page
|
||
* @param args - arguments to be passed to the pageFunction
|
||
*/
|
||
async evaluateHandle<HandlerType extends JSHandle = JSHandle>(
|
||
pageFunction: EvaluateHandleFn,
|
||
...args: SerializableOrJSHandle[]
|
||
): Promise<HandlerType> {
|
||
const context = await this.mainFrame().executionContext();
|
||
return context.evaluateHandle<HandlerType>(pageFunction, ...args);
|
||
}
|
||
|
||
/**
|
||
* This method iterates the JavaScript heap and finds all objects with the
|
||
* given prototype.
|
||
*
|
||
* @remarks
|
||
* Shortcut for
|
||
* {@link ExecutionContext.queryObjects |
|
||
* page.mainFrame().executionContext().queryObjects(prototypeHandle)}.
|
||
*
|
||
* @example
|
||
*
|
||
* ```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();
|
||
* ```
|
||
* @param prototypeHandle - a handle to the object prototype.
|
||
* @returns Promise which resolves to a handle to an array of objects with
|
||
* this prototype.
|
||
*/
|
||
async queryObjects(prototypeHandle: JSHandle): Promise<JSHandle> {
|
||
const context = await this.mainFrame().executionContext();
|
||
return context.queryObjects(prototypeHandle);
|
||
}
|
||
|
||
/**
|
||
* This method runs `document.querySelector` within the page and passes the
|
||
* result as the first argument to the `pageFunction`.
|
||
*
|
||
* @remarks
|
||
*
|
||
* If no element is found matching `selector`, the method will throw an error.
|
||
*
|
||
* If `pageFunction` returns a promise `$eval` will wait for the promise to
|
||
* resolve and then return its value.
|
||
*
|
||
* @example
|
||
*
|
||
* ```
|
||
* const searchValue = await page.$eval('#search', el => el.value);
|
||
* const preloadHref = await page.$eval('link[rel=preload]', el => el.href);
|
||
* const html = await page.$eval('.main-container', el => el.outerHTML);
|
||
* ```
|
||
*
|
||
* If you are using TypeScript, you may have to provide an explicit type to the
|
||
* first argument of the `pageFunction`.
|
||
* By default it is typed as `Element`, but you may need to provide a more
|
||
* specific sub-type:
|
||
*
|
||
* @example
|
||
*
|
||
* ```
|
||
* // if you don't provide HTMLInputElement here, TS will error
|
||
* // as `value` is not on `Element`
|
||
* const searchValue = await page.$eval('#search', (el: HTMLInputElement) => el.value);
|
||
* ```
|
||
*
|
||
* The compiler should be able to infer the return type
|
||
* from the `pageFunction` you provide. If it is unable to, you can use the generic
|
||
* type to tell the compiler what return type you expect from `$eval`:
|
||
*
|
||
* @example
|
||
*
|
||
* ```
|
||
* // The compiler can infer the return type in this case, but if it can't
|
||
* // or if you want to be more explicit, provide it as the generic type.
|
||
* const searchValue = await page.$eval<string>(
|
||
* '#search', (el: HTMLInputElement) => el.value
|
||
* );
|
||
* ```
|
||
*
|
||
* @param selector - the
|
||
* {@link https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors | selector}
|
||
* to query for
|
||
* @param pageFunction - the function to be evaluated in the page context.
|
||
* Will be passed the result of `document.querySelector(selector)` as its
|
||
* first argument.
|
||
* @param args - any additional arguments to pass through to `pageFunction`.
|
||
*
|
||
* @returns The result of calling `pageFunction`. If it returns an element it
|
||
* is wrapped in an {@link ElementHandle}, else the raw value itself is
|
||
* returned.
|
||
*/
|
||
async $eval<ReturnType>(
|
||
selector: string,
|
||
pageFunction: (
|
||
element: Element,
|
||
/* Unfortunately this has to be unknown[] because it's hard to get
|
||
* TypeScript to understand that the arguments will be left alone unless
|
||
* they are an ElementHandle, in which case they will be unwrapped.
|
||
* The nice thing about unknown vs any is that unknown will force the user
|
||
* to type the item before using it to avoid errors.
|
||
*
|
||
* TODO(@jackfranklin): We could fix this by using overloads like
|
||
* DefinitelyTyped does:
|
||
* https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/puppeteer/index.d.ts#L114
|
||
*/
|
||
...args: unknown[]
|
||
) => ReturnType | Promise<ReturnType>,
|
||
...args: SerializableOrJSHandle[]
|
||
): Promise<WrapElementHandle<ReturnType>> {
|
||
return this.mainFrame().$eval<ReturnType>(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`.
|
||
*
|
||
* @remarks
|
||
*
|
||
* If `pageFunction` returns a promise `$$eval` will wait for the promise to
|
||
* resolve and then return its value.
|
||
*
|
||
* @example
|
||
*
|
||
* ```
|
||
* // get the amount of divs on the page
|
||
* const divCount = await page.$$eval('div', divs => divs.length);
|
||
*
|
||
* // get the text content of all the `.options` elements:
|
||
* const options = await page.$$eval('div > span.options', options => {
|
||
* return options.map(option => option.textContent)
|
||
* });
|
||
* ```
|
||
*
|
||
* If you are using TypeScript, you may have to provide an explicit type to the
|
||
* first argument of the `pageFunction`.
|
||
* By default it is typed as `Element[]`, but you may need to provide a more
|
||
* specific sub-type:
|
||
*
|
||
* @example
|
||
*
|
||
* ```
|
||
* // if you don't provide HTMLInputElement here, TS will error
|
||
* // as `value` is not on `Element`
|
||
* await page.$$eval('input', (elements: HTMLInputElement[]) => {
|
||
* return elements.map(e => e.value);
|
||
* });
|
||
* ```
|
||
*
|
||
* The compiler should be able to infer the return type
|
||
* from the `pageFunction` you provide. If it is unable to, you can use the generic
|
||
* type to tell the compiler what return type you expect from `$$eval`:
|
||
*
|
||
* @example
|
||
*
|
||
* ```
|
||
* // The compiler can infer the return type in this case, but if it can't
|
||
* // or if you want to be more explicit, provide it as the generic type.
|
||
* const allInputValues = await page.$$eval<string[]>(
|
||
* 'input', (elements: HTMLInputElement[]) => elements.map(e => e.textContent)
|
||
* );
|
||
* ```
|
||
*
|
||
* @param selector - the
|
||
* {@link https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors | selector}
|
||
* to query for
|
||
* @param pageFunction - the function to be evaluated in the page context. Will
|
||
* be passed the result of `Array.from(document.querySelectorAll(selector))`
|
||
* as its first argument.
|
||
* @param args - any additional arguments to pass through to `pageFunction`.
|
||
*
|
||
* @returns The result of calling `pageFunction`. If it returns an element it
|
||
* is wrapped in an {@link ElementHandle}, else the raw value itself is
|
||
* returned.
|
||
*/
|
||
async $$eval<ReturnType>(
|
||
selector: string,
|
||
pageFunction: (
|
||
elements: Element[],
|
||
/* These have to be typed as unknown[] for the same reason as the $eval
|
||
* definition above, please see that comment for more details and the TODO
|
||
* that will improve things.
|
||
*/
|
||
...args: unknown[]
|
||
) => ReturnType | Promise<ReturnType>,
|
||
...args: SerializableOrJSHandle[]
|
||
): Promise<WrapElementHandle<ReturnType>> {
|
||
return this.mainFrame().$$eval<ReturnType>(selector, pageFunction, ...args);
|
||
}
|
||
|
||
/**
|
||
* The method runs `document.querySelectorAll` within the page. If no elements
|
||
* match the selector, the return value resolves to `[]`.
|
||
* @remarks
|
||
* Shortcut for {@link Frame.$$ | Page.mainFrame().$$(selector) }.
|
||
* @param selector - A `selector` to query page for
|
||
*/
|
||
async $$<T extends Element = Element>(
|
||
selector: string
|
||
): Promise<Array<ElementHandle<T>>> {
|
||
return this.mainFrame().$$<T>(selector);
|
||
}
|
||
|
||
/**
|
||
* 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.
|
||
* @remarks
|
||
* Shortcut for {@link Frame.$x | Page.mainFrame().$x(expression) }.
|
||
* @param expression - Expression to evaluate
|
||
*/
|
||
async $x(expression: string): Promise<ElementHandle[]> {
|
||
return this.mainFrame().$x(expression);
|
||
}
|
||
|
||
/**
|
||
* 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.
|
||
*/
|
||
async cookies(...urls: string[]): Promise<Protocol.Network.Cookie[]> {
|
||
const originalCookies = (
|
||
await this._client.send('Network.getCookies', {
|
||
urls: urls.length ? urls : [this.url()],
|
||
})
|
||
).cookies;
|
||
|
||
const unsupportedCookieAttributes = ['priority'];
|
||
const filterUnsupportedAttributes = (
|
||
cookie: Protocol.Network.Cookie
|
||
): Protocol.Network.Cookie => {
|
||
for (const attr of unsupportedCookieAttributes) delete cookie[attr];
|
||
return cookie;
|
||
};
|
||
return originalCookies.map(filterUnsupportedAttributes);
|
||
}
|
||
|
||
async deleteCookie(
|
||
...cookies: Protocol.Network.DeleteCookiesRequest[]
|
||
): Promise<void> {
|
||
const pageURL = this.url();
|
||
for (const cookie of cookies) {
|
||
const item = Object.assign({}, cookie);
|
||
if (!cookie.url && pageURL.startsWith('http')) item.url = pageURL;
|
||
await this._client.send('Network.deleteCookies', item);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @example
|
||
* ```js
|
||
* await page.setCookie(cookieObject1, cookieObject2);
|
||
* ```
|
||
*/
|
||
async setCookie(...cookies: Protocol.Network.CookieParam[]): Promise<void> {
|
||
const pageURL = this.url();
|
||
const startsWithHTTP = pageURL.startsWith('http');
|
||
const items = cookies.map((cookie) => {
|
||
const item = Object.assign({}, cookie);
|
||
if (!item.url && startsWithHTTP) item.url = pageURL;
|
||
assert(
|
||
item.url !== 'about:blank',
|
||
`Blank page can not have cookie "${item.name}"`
|
||
);
|
||
assert(
|
||
!String.prototype.startsWith.call(item.url || '', 'data:'),
|
||
`Data URL page can not have cookie "${item.name}"`
|
||
);
|
||
return item;
|
||
});
|
||
await this.deleteCookie(...items);
|
||
if (items.length)
|
||
await this._client.send('Network.setCookies', { cookies: items });
|
||
}
|
||
|
||
/**
|
||
* Adds a `<script>` tag into the page with the desired URL or content.
|
||
* @remarks
|
||
* Shortcut for {@link Frame.addScriptTag | page.mainFrame().addScriptTag(options) }.
|
||
* @returns Promise which resolves to the added tag when the script's onload fires or
|
||
* when the script content was injected into frame.
|
||
*/
|
||
async addScriptTag(options: {
|
||
url?: string;
|
||
path?: string;
|
||
content?: string;
|
||
type?: string;
|
||
}): Promise<ElementHandle> {
|
||
return this.mainFrame().addScriptTag(options);
|
||
}
|
||
|
||
/**
|
||
* Adds a `<link rel="stylesheet">` tag into the page with the desired URL or a
|
||
* `<style type="text/css">` tag with the content.
|
||
* @returns Promise which resolves to the added tag when the stylesheet's
|
||
* onload fires or when the CSS content was injected into frame.
|
||
*/
|
||
async addStyleTag(options: {
|
||
url?: string;
|
||
path?: string;
|
||
content?: string;
|
||
}): Promise<ElementHandle> {
|
||
return this.mainFrame().addStyleTag(options);
|
||
}
|
||
|
||
/**
|
||
* 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.
|
||
* @param name - Name of the function on the window object
|
||
* @param puppeteerFunction - Callback function which will be called in
|
||
* Puppeteer's context.
|
||
* @example
|
||
* An example of adding an `md5` function into the page:
|
||
* ```js
|
||
* const puppeteer = require('puppeteer');
|
||
* const crypto = require('crypto');
|
||
*
|
||
* (async () => {
|
||
* const browser = await puppeteer.launch();
|
||
* 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');
|
||
*
|
||
* (async () => {
|
||
* const browser = await puppeteer.launch();
|
||
* 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();
|
||
* })();
|
||
* ```
|
||
*/
|
||
async exposeFunction(
|
||
name: string,
|
||
puppeteerFunction: Function
|
||
): Promise<void> {
|
||
if (this._pageBindings.has(name))
|
||
throw new Error(
|
||
`Failed to add page binding with name ${name}: window['${name}'] already exists!`
|
||
);
|
||
this._pageBindings.set(name, puppeteerFunction);
|
||
|
||
const expression = helper.pageBindingInitString('exposedFun', name);
|
||
await this._client.send('Runtime.addBinding', { name: name });
|
||
await this._client.send('Page.addScriptToEvaluateOnNewDocument', {
|
||
source: expression,
|
||
});
|
||
await Promise.all(
|
||
this.frames().map((frame) => frame.evaluate(expression).catch(debugError))
|
||
);
|
||
}
|
||
|
||
/**
|
||
* Provide credentials for `HTTP authentication`.
|
||
* @remarks To disable authentication, pass `null`.
|
||
*/
|
||
async authenticate(credentials: Credentials): Promise<void> {
|
||
return this._frameManager.networkManager().authenticate(credentials);
|
||
}
|
||
|
||
/**
|
||
* 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.
|
||
* @param headers - An object containing additional HTTP headers to be sent
|
||
* with every request. All header values must be strings.
|
||
* @returns
|
||
*/
|
||
async setExtraHTTPHeaders(headers: Record<string, string>): Promise<void> {
|
||
return this._frameManager.networkManager().setExtraHTTPHeaders(headers);
|
||
}
|
||
|
||
/**
|
||
* @param userAgent - Specific user agent to use in this page
|
||
* @param userAgentData - Specific user agent client hint data to use in this
|
||
* page
|
||
* @returns Promise which resolves when the user agent is set.
|
||
*/
|
||
async setUserAgent(
|
||
userAgent: string,
|
||
userAgentMetadata?: Protocol.Emulation.UserAgentMetadata
|
||
): Promise<void> {
|
||
return this._frameManager
|
||
.networkManager()
|
||
.setUserAgent(userAgent, userAgentMetadata);
|
||
}
|
||
|
||
/**
|
||
* @returns Object containing metrics as key/value pairs.
|
||
*
|
||
* - `Timestamp` : The timestamp when the metrics sample was taken.
|
||
*
|
||
* - `Documents` : Number of documents in the page.
|
||
*
|
||
* - `Frames` : Number of frames in the page.
|
||
*
|
||
* - `JSEventListeners` : Number of events in the page.
|
||
*
|
||
* - `Nodes` : Number of DOM nodes in the page.
|
||
*
|
||
* - `LayoutCount` : Total number of full or partial page layout.
|
||
*
|
||
* - `RecalcStyleCount` : Total number of page style recalculations.
|
||
*
|
||
* - `LayoutDuration` : Combined durations of all page layouts.
|
||
*
|
||
* - `RecalcStyleDuration` : Combined duration of all page style
|
||
* recalculations.
|
||
*
|
||
* - `ScriptDuration` : Combined duration of JavaScript execution.
|
||
*
|
||
* - `TaskDuration` : Combined duration of all tasks performed by the browser.
|
||
*
|
||
*
|
||
* - `JSHeapUsedSize` : Used JavaScript heap size.
|
||
*
|
||
* - `JSHeapTotalSize` : Total JavaScript heap size.
|
||
* @remarks
|
||
* NOTE: All timestamps are in monotonic time: monotonically increasing time
|
||
* in seconds since an arbitrary point in the past.
|
||
*/
|
||
async metrics(): Promise<Metrics> {
|
||
const response = await this._client.send('Performance.getMetrics');
|
||
return this._buildMetricsObject(response.metrics);
|
||
}
|
||
|
||
private _emitMetrics(event: Protocol.Performance.MetricsEvent): void {
|
||
this.emit(PageEmittedEvents.Metrics, {
|
||
title: event.title,
|
||
metrics: this._buildMetricsObject(event.metrics),
|
||
});
|
||
}
|
||
|
||
private _buildMetricsObject(
|
||
metrics?: Protocol.Performance.Metric[]
|
||
): Metrics {
|
||
const result = {};
|
||
for (const metric of metrics || []) {
|
||
if (supportedMetrics.has(metric.name)) result[metric.name] = metric.value;
|
||
}
|
||
return result;
|
||
}
|
||
|
||
private _handleException(
|
||
exceptionDetails: Protocol.Runtime.ExceptionDetails
|
||
): void {
|
||
const message = helper.getExceptionMessage(exceptionDetails);
|
||
const err = new Error(message);
|
||
err.stack = ''; // Don't report clientside error with a node stack attached
|
||
this.emit(PageEmittedEvents.PageError, err);
|
||
}
|
||
|
||
private async _onConsoleAPI(
|
||
event: Protocol.Runtime.ConsoleAPICalledEvent
|
||
): Promise<void> {
|
||
if (event.executionContextId === 0) {
|
||
// DevTools protocol stores the last 1000 console messages. These
|
||
// messages are always reported even for removed execution contexts. In
|
||
// this case, they are marked with executionContextId = 0 and are
|
||
// reported upon enabling Runtime agent.
|
||
//
|
||
// Ignore these messages since:
|
||
// - there's no execution context we can use to operate with message
|
||
// arguments
|
||
// - these messages are reported before Puppeteer clients can subscribe
|
||
// to the 'console'
|
||
// page event.
|
||
//
|
||
// @see https://github.com/puppeteer/puppeteer/issues/3865
|
||
return;
|
||
}
|
||
const context = this._frameManager.executionContextById(
|
||
event.executionContextId
|
||
);
|
||
const values = event.args.map((arg) => createJSHandle(context, arg));
|
||
this._addConsoleMessage(event.type, values, event.stackTrace);
|
||
}
|
||
|
||
private async _onBindingCalled(
|
||
event: Protocol.Runtime.BindingCalledEvent
|
||
): Promise<void> {
|
||
let payload: { type: string; name: string; seq: number; args: unknown[] };
|
||
try {
|
||
payload = JSON.parse(event.payload);
|
||
} catch {
|
||
// The binding was either called by something in the page or it was
|
||
// called before our wrapper was initialized.
|
||
return;
|
||
}
|
||
const { type, name, seq, args } = payload;
|
||
if (type !== 'exposedFun' || !this._pageBindings.has(name)) return;
|
||
let expression = null;
|
||
try {
|
||
const result = await this._pageBindings.get(name)(...args);
|
||
expression = helper.pageBindingDeliverResultString(name, seq, result);
|
||
} catch (error) {
|
||
if (error instanceof Error)
|
||
expression = helper.pageBindingDeliverErrorString(
|
||
name,
|
||
seq,
|
||
error.message,
|
||
error.stack
|
||
);
|
||
else
|
||
expression = helper.pageBindingDeliverErrorValueString(
|
||
name,
|
||
seq,
|
||
error
|
||
);
|
||
}
|
||
this._client
|
||
.send('Runtime.evaluate', {
|
||
expression,
|
||
contextId: event.executionContextId,
|
||
})
|
||
.catch(debugError);
|
||
}
|
||
|
||
private _addConsoleMessage(
|
||
type: ConsoleMessageType,
|
||
args: JSHandle[],
|
||
stackTrace?: Protocol.Runtime.StackTrace
|
||
): void {
|
||
if (!this.listenerCount(PageEmittedEvents.Console)) {
|
||
args.forEach((arg) => arg.dispose());
|
||
return;
|
||
}
|
||
const textTokens = [];
|
||
for (const arg of args) {
|
||
const remoteObject = arg._remoteObject;
|
||
if (remoteObject.objectId) textTokens.push(arg.toString());
|
||
else textTokens.push(helper.valueFromRemoteObject(remoteObject));
|
||
}
|
||
const stackTraceLocations = [];
|
||
if (stackTrace) {
|
||
for (const callFrame of stackTrace.callFrames) {
|
||
stackTraceLocations.push({
|
||
url: callFrame.url,
|
||
lineNumber: callFrame.lineNumber,
|
||
columnNumber: callFrame.columnNumber,
|
||
});
|
||
}
|
||
}
|
||
const message = new ConsoleMessage(
|
||
type,
|
||
textTokens.join(' '),
|
||
args,
|
||
stackTraceLocations
|
||
);
|
||
this.emit(PageEmittedEvents.Console, message);
|
||
}
|
||
|
||
private _onDialog(event: Protocol.Page.JavascriptDialogOpeningEvent): void {
|
||
let dialogType = null;
|
||
const validDialogTypes = new Set<Protocol.Page.DialogType>([
|
||
'alert',
|
||
'confirm',
|
||
'prompt',
|
||
'beforeunload',
|
||
]);
|
||
|
||
if (validDialogTypes.has(event.type)) {
|
||
dialogType = event.type as Protocol.Page.DialogType;
|
||
}
|
||
assert(dialogType, 'Unknown javascript dialog type: ' + event.type);
|
||
|
||
const dialog = new Dialog(
|
||
this._client,
|
||
dialogType,
|
||
event.message,
|
||
event.defaultPrompt
|
||
);
|
||
this.emit(PageEmittedEvents.Dialog, dialog);
|
||
}
|
||
|
||
/**
|
||
* Resets default white background
|
||
*/
|
||
private async _resetDefaultBackgroundColor() {
|
||
await this._client.send('Emulation.setDefaultBackgroundColorOverride');
|
||
}
|
||
|
||
/**
|
||
* Hides default white background
|
||
*/
|
||
private async _setTransparentBackgroundColor(): Promise<void> {
|
||
await this._client.send('Emulation.setDefaultBackgroundColorOverride', {
|
||
color: { r: 0, g: 0, b: 0, a: 0 },
|
||
});
|
||
}
|
||
|
||
/**
|
||
*
|
||
* @returns
|
||
* @remarks Shortcut for
|
||
* {@link Frame.url | page.mainFrame().url()}.
|
||
*/
|
||
url(): string {
|
||
return this.mainFrame().url();
|
||
}
|
||
|
||
async content(): Promise<string> {
|
||
return await this._frameManager.mainFrame().content();
|
||
}
|
||
|
||
/**
|
||
* @param html - HTML markup to assign to the page.
|
||
* @param options - Parameters that has some properties.
|
||
* @remarks
|
||
* The parameter `options` might have the following options.
|
||
*
|
||
* - `timeout` : Maximum time in milliseconds for resources to load, defaults
|
||
* to 30 seconds, pass `0` to disable timeout. The default value can be
|
||
* changed by using the
|
||
* {@link Page.setDefaultNavigationTimeout |
|
||
* page.setDefaultNavigationTimeout(timeout)}
|
||
* or {@link Page.setDefaultTimeout | page.setDefaultTimeout(timeout)}
|
||
* methods.
|
||
*
|
||
* - `waitUntil`: When to consider setting markup succeeded, defaults to `load`.
|
||
* Given an array of event strings, setting content is considered to be
|
||
* successful after all events have been fired. Events can be either:<br/>
|
||
* - `load` : consider setting content to be finished when the `load` event is
|
||
* fired.<br/>
|
||
* - `domcontentloaded` : consider setting content to be finished when the
|
||
* `DOMContentLoaded` event is fired.<br/>
|
||
* - `networkidle0` : consider setting content to be finished when there are no
|
||
* more than 0 network connections for at least `500` ms.<br/>
|
||
* - `networkidle2` : consider setting content to be finished when there are no
|
||
* more than 2 network connections for at least `500` ms.
|
||
*/
|
||
async setContent(html: string, options: WaitForOptions = {}): Promise<void> {
|
||
await this._frameManager.mainFrame().setContent(html, options);
|
||
}
|
||
|
||
/**
|
||
* @param url - URL to navigate page to. The URL should include scheme, e.g.
|
||
* `https://`
|
||
* @param options - Navigation Parameter
|
||
* @returns Promise which resolves to the main resource response. In case of
|
||
* multiple redirects, the navigation will resolve with the response of the
|
||
* last redirect.
|
||
* @remarks
|
||
* The argument `options` might have the following properties:
|
||
*
|
||
* - `timeout` : Maximum navigation time in milliseconds, defaults to 30
|
||
* seconds, pass 0 to disable timeout. The default value can be changed by
|
||
* using the
|
||
* {@link Page.setDefaultNavigationTimeout |
|
||
* page.setDefaultNavigationTimeout(timeout)}
|
||
* or {@link Page.setDefaultTimeout | page.setDefaultTimeout(timeout)}
|
||
* methods.
|
||
*
|
||
* - `waitUntil`: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:<br/>
|
||
* - `load` : consider navigation to be finished when the load event is
|
||
* fired.<br/>
|
||
* - `domcontentloaded` : consider navigation to be finished when the
|
||
* DOMContentLoaded event is fired.<br/>
|
||
* - `networkidle0` : consider navigation to be finished when there are no
|
||
* more than 0 network connections for at least `500` ms.<br/>
|
||
* - `networkidle2` : consider navigation to be finished when there are no
|
||
* more than 2 network connections for at least `500` ms.
|
||
*
|
||
* - `referer` : Referer header value. If provided it will take preference
|
||
* over the referer header value set by
|
||
* {@link Page.setExtraHTTPHeaders |page.setExtraHTTPHeaders()}.
|
||
*
|
||
* `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 remote server does not respond or is unreachable.
|
||
* - the main resource failed to load.
|
||
*
|
||
* `page.goto` 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 response.status().
|
||
*
|
||
* NOTE: `page.goto` either throws an error or returns a main resource
|
||
* response. The only exceptions are navigation to about:blank or navigation
|
||
* to the same URL with a different hash, which would succeed and return null.
|
||
*
|
||
* NOTE: Headless mode doesn't support navigation to a PDF document. See the
|
||
* {@link https://bugs.chromium.org/p/chromium/issues/detail?id=761295
|
||
* | upstream issue}.
|
||
*
|
||
* Shortcut for {@link Frame.goto | page.mainFrame().goto(url, options)}.
|
||
*/
|
||
async goto(
|
||
url: string,
|
||
options: WaitForOptions & { referer?: string } = {}
|
||
): Promise<HTTPResponse> {
|
||
return await this._frameManager.mainFrame().goto(url, options);
|
||
}
|
||
|
||
/**
|
||
* @param options - Navigation parameters which might have the following
|
||
* properties:
|
||
* @returns Promise which resolves to the main resource response. In case of
|
||
* multiple redirects, the navigation will resolve with the response of the
|
||
* last redirect.
|
||
* @remarks
|
||
* The argument `options` might have the following properties:
|
||
*
|
||
* - `timeout` : Maximum navigation time in milliseconds, defaults to 30
|
||
* seconds, pass 0 to disable timeout. The default value can be changed by
|
||
* using the
|
||
* {@link Page.setDefaultNavigationTimeout |
|
||
* page.setDefaultNavigationTimeout(timeout)}
|
||
* or {@link Page.setDefaultTimeout | page.setDefaultTimeout(timeout)}
|
||
* methods.
|
||
*
|
||
* - `waitUntil`: 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:<br/>
|
||
* - `load` : consider navigation to be finished when the load event is fired.<br/>
|
||
* - `domcontentloaded` : consider navigation to be finished when the
|
||
* DOMContentLoaded event is fired.<br/>
|
||
* - `networkidle0` : consider navigation to be finished when there are no
|
||
* more than 0 network connections for at least `500` ms.<br/>
|
||
* - `networkidle2` : consider navigation to be finished when there are no
|
||
* more than 2 network connections for at least `500` ms.
|
||
*/
|
||
async reload(options?: WaitForOptions): Promise<HTTPResponse | null> {
|
||
const result = await Promise.all<HTTPResponse, void>([
|
||
this.waitForNavigation(options),
|
||
this._client.send('Page.reload'),
|
||
]);
|
||
|
||
return result[0];
|
||
}
|
||
|
||
/**
|
||
* This resolves when the page navigates to a new URL or reloads. It is useful
|
||
* when you run code that will indirectly cause the page to navigate. Consider
|
||
* this example:
|
||
* ```js
|
||
* const [response] = await Promise.all([
|
||
* page.waitForNavigation(), // The promise resolves after navigation has finished
|
||
* page.click('a.my-link'), // Clicking the link will indirectly cause a navigation
|
||
* ]);
|
||
* ```
|
||
*
|
||
* @param options - Navigation parameters which might have the following properties:
|
||
* @returns Promise which resolves to the main resource response. In case of
|
||
* multiple redirects, the navigation will resolve with the response of the
|
||
* last redirect. In case of navigation to a different anchor or navigation
|
||
* due to History API usage, the navigation will resolve with `null`.
|
||
* @remarks
|
||
* NOTE: Usage of the
|
||
* {@link https://developer.mozilla.org/en-US/docs/Web/API/History_API | History API}
|
||
* to change the URL is considered a navigation.
|
||
*
|
||
* Shortcut for
|
||
* {@link Frame.waitForNavigation | page.mainFrame().waitForNavigation(options)}.
|
||
*/
|
||
async waitForNavigation(
|
||
options: WaitForOptions = {}
|
||
): Promise<HTTPResponse | null> {
|
||
return await this._frameManager.mainFrame().waitForNavigation(options);
|
||
}
|
||
|
||
private _sessionClosePromise(): Promise<Error> {
|
||
if (!this._disconnectPromise)
|
||
this._disconnectPromise = new Promise((fulfill) =>
|
||
this._client.once(CDPSessionEmittedEvents.Disconnected, () =>
|
||
fulfill(new Error('Target closed'))
|
||
)
|
||
);
|
||
return this._disconnectPromise;
|
||
}
|
||
|
||
/**
|
||
* @param urlOrPredicate - A URL or predicate to wait for
|
||
* @param options - Optional waiting parameters
|
||
* @returns Promise which resolves to the matched response
|
||
* @example
|
||
* ```js
|
||
* const firstResponse = await page.waitForResponse(
|
||
* 'https://example.com/resource'
|
||
* );
|
||
* const finalResponse = await page.waitForResponse(
|
||
* (response) =>
|
||
* response.url() === 'https://example.com' && response.status() === 200
|
||
* );
|
||
* const finalResponse = await page.waitForResponse(async (response) => {
|
||
* return (await response.text()).includes('<html>');
|
||
* });
|
||
* return finalResponse.ok();
|
||
* ```
|
||
* @remarks
|
||
* Optional Waiting Parameters have:
|
||
*
|
||
* - `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
|
||
* {@link Page.setDefaultTimeout} method.
|
||
*/
|
||
async waitForRequest(
|
||
urlOrPredicate: string | ((req: HTTPRequest) => boolean | Promise<boolean>),
|
||
options: { timeout?: number } = {}
|
||
): Promise<HTTPRequest> {
|
||
const { timeout = this._timeoutSettings.timeout() } = options;
|
||
return helper.waitForEvent(
|
||
this._frameManager.networkManager(),
|
||
NetworkManagerEmittedEvents.Request,
|
||
(request) => {
|
||
if (helper.isString(urlOrPredicate))
|
||
return urlOrPredicate === request.url();
|
||
if (typeof urlOrPredicate === 'function')
|
||
return !!urlOrPredicate(request);
|
||
return false;
|
||
},
|
||
timeout,
|
||
this._sessionClosePromise()
|
||
);
|
||
}
|
||
|
||
/**
|
||
* @param urlOrPredicate - A URL or predicate to wait for.
|
||
* @param options - Optional waiting parameters
|
||
* @returns Promise which resolves to the matched response.
|
||
* @example
|
||
* ```js
|
||
* const firstResponse = await page.waitForResponse(
|
||
* 'https://example.com/resource'
|
||
* );
|
||
* const finalResponse = await page.waitForResponse(
|
||
* (response) =>
|
||
* response.url() === 'https://example.com' && response.status() === 200
|
||
* );
|
||
* const finalResponse = await page.waitForResponse(async (response) => {
|
||
* return (await response.text()).includes('<html>');
|
||
* });
|
||
* return finalResponse.ok();
|
||
* ```
|
||
* @remarks
|
||
* Optional Parameter have:
|
||
*
|
||
* - `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 {@link Page.setDefaultTimeout} method.
|
||
*/
|
||
async waitForResponse(
|
||
urlOrPredicate:
|
||
| string
|
||
| ((res: HTTPResponse) => boolean | Promise<boolean>),
|
||
options: { timeout?: number } = {}
|
||
): Promise<HTTPResponse> {
|
||
const { timeout = this._timeoutSettings.timeout() } = options;
|
||
return helper.waitForEvent(
|
||
this._frameManager.networkManager(),
|
||
NetworkManagerEmittedEvents.Response,
|
||
async (response) => {
|
||
if (helper.isString(urlOrPredicate))
|
||
return urlOrPredicate === response.url();
|
||
if (typeof urlOrPredicate === 'function')
|
||
return !!(await urlOrPredicate(response));
|
||
return false;
|
||
},
|
||
timeout,
|
||
this._sessionClosePromise()
|
||
);
|
||
}
|
||
|
||
/**
|
||
* This method navigate to the previous page in history.
|
||
* @param options - Navigation parameters
|
||
* @returns 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`.
|
||
* @remarks
|
||
* The argument `options` might have the following properties:
|
||
*
|
||
* - `timeout` : Maximum navigation time in milliseconds, defaults to 30
|
||
* seconds, pass 0 to disable timeout. The default value can be changed by
|
||
* using the
|
||
* {@link Page.setDefaultNavigationTimeout
|
||
* | page.setDefaultNavigationTimeout(timeout)}
|
||
* or {@link Page.setDefaultTimeout | page.setDefaultTimeout(timeout)}
|
||
* methods.
|
||
*
|
||
* - `waitUntil` : 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:<br/>
|
||
* - `load` : consider navigation to be finished when the load event is fired.<br/>
|
||
* - `domcontentloaded` : consider navigation to be finished when the
|
||
* DOMContentLoaded event is fired.<br/>
|
||
* - `networkidle0` : consider navigation to be finished when there are no
|
||
* more than 0 network connections for at least `500` ms.<br/>
|
||
* - `networkidle2` : consider navigation to be finished when there are no
|
||
* more than 2 network connections for at least `500` ms.
|
||
*/
|
||
async goBack(options: WaitForOptions = {}): Promise<HTTPResponse | null> {
|
||
return this._go(-1, options);
|
||
}
|
||
|
||
/**
|
||
* This method navigate to the next page in history.
|
||
* @param options - Navigation Parameter
|
||
* @returns 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 forward, resolves to `null`.
|
||
* @remarks
|
||
* The argument `options` might have the following properties:
|
||
*
|
||
* - `timeout` : Maximum navigation time in milliseconds, defaults to 30
|
||
* seconds, pass 0 to disable timeout. The default value can be changed by
|
||
* using the
|
||
* {@link Page.setDefaultNavigationTimeout
|
||
* | page.setDefaultNavigationTimeout(timeout)}
|
||
* or {@link Page.setDefaultTimeout | page.setDefaultTimeout(timeout)}
|
||
* methods.
|
||
*
|
||
* - `waitUntil`: 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:<br/>
|
||
* - `load` : consider navigation to be finished when the load event is fired.<br/>
|
||
* - `domcontentloaded` : consider navigation to be finished when the
|
||
* DOMContentLoaded event is fired.<br/>
|
||
* - `networkidle0` : consider navigation to be finished when there are no
|
||
* more than 0 network connections for at least `500` ms.<br/>
|
||
* - `networkidle2` : consider navigation to be finished when there are no
|
||
* more than 2 network connections for at least `500` ms.
|
||
*/
|
||
async goForward(options: WaitForOptions = {}): Promise<HTTPResponse | null> {
|
||
return this._go(+1, options);
|
||
}
|
||
|
||
private async _go(
|
||
delta: number,
|
||
options: WaitForOptions
|
||
): Promise<HTTPResponse | null> {
|
||
const history = await this._client.send('Page.getNavigationHistory');
|
||
const entry = history.entries[history.currentIndex + delta];
|
||
if (!entry) return null;
|
||
const result = await Promise.all([
|
||
this.waitForNavigation(options),
|
||
this._client.send('Page.navigateToHistoryEntry', { entryId: entry.id }),
|
||
]);
|
||
return result[0];
|
||
}
|
||
|
||
/**
|
||
* Brings page to front (activates tab).
|
||
*/
|
||
async bringToFront(): Promise<void> {
|
||
await this._client.send('Page.bringToFront');
|
||
}
|
||
|
||
/**
|
||
* Emulates given device metrics and user agent. This method is a shortcut for
|
||
* calling two methods: {@link Page.setUserAgent} and {@link Page.setViewport}
|
||
* To aid emulation, Puppeteer provides a list of device descriptors that can
|
||
* be obtained via the {@link Puppeteer.devices} `page.emulate` will resize
|
||
* the page. A lot of websites don't expect phones to change size, so you
|
||
* should emulate before navigating to the page.
|
||
* @example
|
||
* ```js
|
||
* const puppeteer = require('puppeteer');
|
||
* const iPhone = puppeteer.devices['iPhone 6'];
|
||
* (async () => {
|
||
* const browser = await puppeteer.launch();
|
||
* const page = await browser.newPage();
|
||
* await page.emulate(iPhone);
|
||
* await page.goto('https://www.google.com');
|
||
* // other actions...
|
||
* await browser.close();
|
||
* })();
|
||
* ```
|
||
* @remarks List of all available devices is available in the source code:
|
||
* {@link https://github.com/puppeteer/puppeteer/blob/main/src/common/DeviceDescriptors.ts | src/common/DeviceDescriptors.ts}.
|
||
*/
|
||
async emulate(options: {
|
||
viewport: Viewport;
|
||
userAgent: string;
|
||
}): Promise<void> {
|
||
await Promise.all([
|
||
this.setViewport(options.viewport),
|
||
this.setUserAgent(options.userAgent),
|
||
]);
|
||
}
|
||
|
||
/**
|
||
* @param enabled - Whether or not to enable JavaScript on the page.
|
||
* @returns
|
||
* @remarks
|
||
* NOTE: changing this value won't affect scripts that have already been run.
|
||
* It will take full effect on the next navigation.
|
||
*/
|
||
async setJavaScriptEnabled(enabled: boolean): Promise<void> {
|
||
if (this._javascriptEnabled === enabled) return;
|
||
this._javascriptEnabled = enabled;
|
||
await this._client.send('Emulation.setScriptExecutionDisabled', {
|
||
value: !enabled,
|
||
});
|
||
}
|
||
|
||
/**
|
||
* Toggles bypassing page's Content-Security-Policy.
|
||
* @param enabled - sets bypassing of page's Content-Security-Policy.
|
||
* @remarks
|
||
* 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.
|
||
*/
|
||
async setBypassCSP(enabled: boolean): Promise<void> {
|
||
await this._client.send('Page.setBypassCSP', { enabled });
|
||
}
|
||
|
||
/**
|
||
* @param type - Changes the CSS media type of the page. The only allowed
|
||
* values are `screen`, `print` and `null`. Passing `null` disables CSS media
|
||
* emulation.
|
||
* @example
|
||
* ```
|
||
* await page.evaluate(() => matchMedia('screen').matches);
|
||
* // → true
|
||
* await page.evaluate(() => matchMedia('print').matches);
|
||
* // → false
|
||
*
|
||
* await page.emulateMediaType('print');
|
||
* await page.evaluate(() => matchMedia('screen').matches);
|
||
* // → false
|
||
* await page.evaluate(() => matchMedia('print').matches);
|
||
* // → true
|
||
*
|
||
* await page.emulateMediaType(null);
|
||
* await page.evaluate(() => matchMedia('screen').matches);
|
||
* // → true
|
||
* await page.evaluate(() => matchMedia('print').matches);
|
||
* // → false
|
||
* ```
|
||
*/
|
||
async emulateMediaType(type?: string): Promise<void> {
|
||
assert(
|
||
type === 'screen' || type === 'print' || type === null,
|
||
'Unsupported media type: ' + type
|
||
);
|
||
await this._client.send('Emulation.setEmulatedMedia', {
|
||
media: type || '',
|
||
});
|
||
}
|
||
|
||
async emulateCPUThrottling(factor: number | null): Promise<void> {
|
||
assert(
|
||
factor === null || factor >= 1,
|
||
'Throttling rate should be greater or equal to 1'
|
||
);
|
||
await this._client.send('Emulation.setCPUThrottlingRate', {
|
||
rate: factor !== null ? factor : 1,
|
||
});
|
||
}
|
||
|
||
/**
|
||
* @param features - `<?Array<Object>>` Given an array of media feature
|
||
* objects, emulates CSS media features on the page. Each media feature object
|
||
* must have the following properties:
|
||
* @example
|
||
* ```js
|
||
* await page.emulateMediaFeatures([
|
||
* { name: 'prefers-color-scheme', value: 'dark' },
|
||
* ]);
|
||
* await page.evaluate(() => matchMedia('(prefers-color-scheme: dark)').matches);
|
||
* // → true
|
||
* await page.evaluate(() => matchMedia('(prefers-color-scheme: light)').matches);
|
||
* // → false
|
||
*
|
||
* await page.emulateMediaFeatures([
|
||
* { name: 'prefers-reduced-motion', value: 'reduce' },
|
||
* ]);
|
||
* await page.evaluate(
|
||
* () => matchMedia('(prefers-reduced-motion: reduce)').matches
|
||
* );
|
||
* // → true
|
||
* await page.evaluate(
|
||
* () => matchMedia('(prefers-reduced-motion: no-preference)').matches
|
||
* );
|
||
* // → false
|
||
*
|
||
* await page.emulateMediaFeatures([
|
||
* { name: 'prefers-color-scheme', value: 'dark' },
|
||
* { name: 'prefers-reduced-motion', value: 'reduce' },
|
||
* ]);
|
||
* await page.evaluate(() => matchMedia('(prefers-color-scheme: dark)').matches);
|
||
* // → true
|
||
* await page.evaluate(() => matchMedia('(prefers-color-scheme: light)').matches);
|
||
* // → false
|
||
* await page.evaluate(
|
||
* () => matchMedia('(prefers-reduced-motion: reduce)').matches
|
||
* );
|
||
* // → true
|
||
* await page.evaluate(
|
||
* () => matchMedia('(prefers-reduced-motion: no-preference)').matches
|
||
* );
|
||
* // → false
|
||
*
|
||
* await page.emulateMediaFeatures([{ name: 'color-gamut', value: 'p3' }]);
|
||
* await page.evaluate(() => matchMedia('(color-gamut: srgb)').matches);
|
||
* // → true
|
||
* await page.evaluate(() => matchMedia('(color-gamut: p3)').matches);
|
||
* // → true
|
||
* await page.evaluate(() => matchMedia('(color-gamut: rec2020)').matches);
|
||
* // → false
|
||
* ```
|
||
*/
|
||
async emulateMediaFeatures(features?: MediaFeature[]): Promise<void> {
|
||
if (features === null)
|
||
await this._client.send('Emulation.setEmulatedMedia', { features: null });
|
||
if (Array.isArray(features)) {
|
||
features.every((mediaFeature) => {
|
||
const name = mediaFeature.name;
|
||
assert(
|
||
/^(?:prefers-(?:color-scheme|reduced-motion)|color-gamut)$/.test(
|
||
name
|
||
),
|
||
'Unsupported media feature: ' + name
|
||
);
|
||
return true;
|
||
});
|
||
await this._client.send('Emulation.setEmulatedMedia', {
|
||
features: features,
|
||
});
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @param timezoneId - Changes the timezone of the page. See
|
||
* {@link https://source.chromium.org/chromium/chromium/deps/icu.git/+/faee8bc70570192d82d2978a71e2a615788597d1:source/data/misc/metaZones.txt | ICU’s metaZones.txt}
|
||
* for a list of supported timezone IDs. Passing
|
||
* `null` disables timezone emulation.
|
||
*/
|
||
async emulateTimezone(timezoneId?: string): Promise<void> {
|
||
try {
|
||
await this._client.send('Emulation.setTimezoneOverride', {
|
||
timezoneId: timezoneId || '',
|
||
});
|
||
} catch (error) {
|
||
if (error.message.includes('Invalid timezone'))
|
||
throw new Error(`Invalid timezone ID: ${timezoneId}`);
|
||
throw error;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Emulates the idle state.
|
||
* If no arguments set, clears idle state emulation.
|
||
*
|
||
* @example
|
||
* ```js
|
||
* // set idle emulation
|
||
* await page.emulateIdleState({isUserActive: true, isScreenUnlocked: false});
|
||
*
|
||
* // do some checks here
|
||
* ...
|
||
*
|
||
* // clear idle emulation
|
||
* await page.emulateIdleState();
|
||
* ```
|
||
*
|
||
* @param overrides - Mock idle state. If not set, clears idle overrides
|
||
*/
|
||
async emulateIdleState(overrides?: {
|
||
isUserActive: boolean;
|
||
isScreenUnlocked: boolean;
|
||
}): Promise<void> {
|
||
if (overrides) {
|
||
await this._client.send('Emulation.setIdleOverride', {
|
||
isUserActive: overrides.isUserActive,
|
||
isScreenUnlocked: overrides.isScreenUnlocked,
|
||
});
|
||
} else {
|
||
await this._client.send('Emulation.clearIdleOverride');
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Simulates the given vision deficiency on the page.
|
||
*
|
||
* @example
|
||
* ```js
|
||
* const puppeteer = require('puppeteer');
|
||
*
|
||
* (async () => {
|
||
* const browser = await puppeteer.launch();
|
||
* const page = await browser.newPage();
|
||
* await page.goto('https://v8.dev/blog/10-years');
|
||
*
|
||
* await page.emulateVisionDeficiency('achromatopsia');
|
||
* await page.screenshot({ path: 'achromatopsia.png' });
|
||
*
|
||
* await page.emulateVisionDeficiency('deuteranopia');
|
||
* await page.screenshot({ path: 'deuteranopia.png' });
|
||
*
|
||
* await page.emulateVisionDeficiency('blurredVision');
|
||
* await page.screenshot({ path: 'blurred-vision.png' });
|
||
*
|
||
* await browser.close();
|
||
* })();
|
||
* ```
|
||
*
|
||
* @param type - the type of deficiency to simulate, or `'none'` to reset.
|
||
*/
|
||
async emulateVisionDeficiency(
|
||
type?: Protocol.Emulation.SetEmulatedVisionDeficiencyRequest['type']
|
||
): Promise<void> {
|
||
const visionDeficiencies = new Set<
|
||
Protocol.Emulation.SetEmulatedVisionDeficiencyRequest['type']
|
||
>([
|
||
'none',
|
||
'achromatopsia',
|
||
'blurredVision',
|
||
'deuteranopia',
|
||
'protanopia',
|
||
'tritanopia',
|
||
]);
|
||
try {
|
||
assert(
|
||
!type || visionDeficiencies.has(type),
|
||
`Unsupported vision deficiency: ${type}`
|
||
);
|
||
await this._client.send('Emulation.setEmulatedVisionDeficiency', {
|
||
type: type || 'none',
|
||
});
|
||
} catch (error) {
|
||
throw error;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* `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.
|
||
* @example
|
||
* ```js
|
||
* const page = await browser.newPage();
|
||
* await page.setViewport({
|
||
* width: 640,
|
||
* height: 480,
|
||
* deviceScaleFactor: 1,
|
||
* });
|
||
* await page.goto('https://example.com');
|
||
* ```
|
||
*
|
||
* @param viewport -
|
||
* @remarks
|
||
* Argument viewport have following properties:
|
||
*
|
||
* - `width`: page width in pixels. required
|
||
*
|
||
* - `height`: page height in pixels. required
|
||
*
|
||
* - `deviceScaleFactor`: Specify device scale factor (can be thought of as
|
||
* DPR). Defaults to `1`.
|
||
*
|
||
* - `isMobile`: Whether the meta viewport tag is taken into account. Defaults
|
||
* to `false`.
|
||
*
|
||
* - `hasTouch`: Specifies if viewport supports touch events. Defaults to `false`
|
||
*
|
||
* - `isLandScape`: Specifies if viewport is in landscape mode. Defaults to false.
|
||
*
|
||
* NOTE: in certain cases, setting viewport will reload the page in order to
|
||
* set the isMobile or hasTouch properties.
|
||
*/
|
||
async setViewport(viewport: Viewport): Promise<void> {
|
||
const needsReload = await this._emulationManager.emulateViewport(viewport);
|
||
this._viewport = viewport;
|
||
if (needsReload) await this.reload();
|
||
}
|
||
|
||
/**
|
||
* @returns
|
||
*
|
||
* - `width`: page's width in pixels
|
||
*
|
||
* - `height`: page's height in pixels
|
||
*
|
||
* - `deviceScalarFactor`: Specify device scale factor (can be though of as
|
||
* dpr). Defaults to `1`.
|
||
*
|
||
* - `isMobile`: Whether the meta viewport tag is taken into account. Defaults
|
||
* to `false`.
|
||
*
|
||
* - `hasTouch`: Specifies if viewport supports touch events. Defaults to
|
||
* `false`.
|
||
*
|
||
* - `isLandScape`: Specifies if viewport is in landscape mode. Defaults to
|
||
* `false`.
|
||
*/
|
||
viewport(): Viewport | null {
|
||
return this._viewport;
|
||
}
|
||
|
||
/**
|
||
* @remarks
|
||
*
|
||
* Evaluates a function in the page's context and returns the result.
|
||
*
|
||
* If the function passed to `page.evaluteHandle` returns a Promise, the
|
||
* function will wait for the promise to resolve and return its value.
|
||
*
|
||
* @example
|
||
*
|
||
* ```js
|
||
* const result = await frame.evaluate(() => {
|
||
* return Promise.resolve(8 * 7);
|
||
* });
|
||
* console.log(result); // prints "56"
|
||
* ```
|
||
*
|
||
* You can pass a string instead of a function (although functions are
|
||
* recommended as they are easier to debug and use with TypeScript):
|
||
*
|
||
* @example
|
||
* ```
|
||
* const aHandle = await page.evaluate('1 + 2');
|
||
* ```
|
||
*
|
||
* To get the best TypeScript experience, you should pass in as the
|
||
* generic the type of `pageFunction`:
|
||
*
|
||
* ```
|
||
* const aHandle = await page.evaluate<() => number>(() => 2);
|
||
* ```
|
||
*
|
||
* @example
|
||
*
|
||
* {@link ElementHandle} instances (including {@link JSHandle}s) can be passed
|
||
* as arguments to the `pageFunction`:
|
||
*
|
||
* ```
|
||
* const bodyHandle = await page.$('body');
|
||
* const html = await page.evaluate(body => body.innerHTML, bodyHandle);
|
||
* await bodyHandle.dispose();
|
||
* ```
|
||
*
|
||
* @param pageFunction - a function that is run within the page
|
||
* @param args - arguments to be passed to the pageFunction
|
||
*
|
||
* @returns the return value of `pageFunction`.
|
||
*/
|
||
async evaluate<T extends EvaluateFn>(
|
||
pageFunction: T,
|
||
...args: SerializableOrJSHandle[]
|
||
): Promise<UnwrapPromiseLike<EvaluateFnReturnType<T>>> {
|
||
return this._frameManager.mainFrame().evaluate<T>(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 `Math.random`.
|
||
* @param pageFunction - Function to be evaluated in browser context
|
||
* @param args - Arguments to pass to `pageFunction`
|
||
* @example
|
||
* 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);
|
||
* ```
|
||
*/
|
||
async evaluateOnNewDocument(
|
||
pageFunction: Function | string,
|
||
...args: unknown[]
|
||
): Promise<void> {
|
||
const source = helper.evaluationString(pageFunction, ...args);
|
||
await this._client.send('Page.addScriptToEvaluateOnNewDocument', {
|
||
source,
|
||
});
|
||
}
|
||
|
||
/**
|
||
* Toggles ignoring cache for each request based on the enabled state. By
|
||
* default, caching is enabled.
|
||
* @param enabled - sets the `enabled` state of cache
|
||
*/
|
||
async setCacheEnabled(enabled = true): Promise<void> {
|
||
await this._frameManager.networkManager().setCacheEnabled(enabled);
|
||
}
|
||
|
||
/**
|
||
* @remarks
|
||
* Options object which might have the following properties:
|
||
*
|
||
* - `path` : 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
|
||
* {@link https://nodejs.org/api/process.html#process_process_cwd
|
||
* | current working directory}.
|
||
* If no path is provided, the image won't be saved to the disk.
|
||
*
|
||
* - `type` : Specify screenshot type, can be either `jpeg` or `png`.
|
||
* Defaults to 'png'.
|
||
*
|
||
* - `quality` : The quality of the image, between 0-100. Not
|
||
* applicable to `png` images.
|
||
*
|
||
* - `fullPage` : When true, takes a screenshot of the full
|
||
* scrollable page. Defaults to `false`
|
||
*
|
||
* - `clip` : An object which specifies clipping region of the page.
|
||
* Should have the following fields:<br/>
|
||
* - `x` : x-coordinate of top-left corner of clip area.<br/>
|
||
* - `y` : y-coordinate of top-left corner of clip area.<br/>
|
||
* - `width` : width of clipping area.<br/>
|
||
* - `height` : height of clipping area.
|
||
*
|
||
* - `omitBackground` : Hides default white background and allows
|
||
* capturing screenshots with transparency. Defaults to `false`
|
||
*
|
||
* - `encoding` : The encoding of the image, can be either base64 or
|
||
* binary. Defaults to `binary`.
|
||
*
|
||
*
|
||
* NOTE: Screenshots take at least 1/6 second on OS X. See
|
||
* {@link https://crbug.com/741689} for discussion.
|
||
* @returns Promise which resolves to buffer or a base64 string (depending on
|
||
* the value of `encoding`) with captured screenshot.
|
||
*/
|
||
async screenshot(
|
||
options: ScreenshotOptions = {}
|
||
): Promise<Buffer | string | void> {
|
||
let screenshotType = null;
|
||
// options.type takes precedence over inferring the type from options.path
|
||
// because it may be a 0-length file with no extension created beforehand
|
||
// (i.e. as a temp file).
|
||
if (options.type) {
|
||
assert(
|
||
options.type === 'png' || options.type === 'jpeg',
|
||
'Unknown options.type value: ' + options.type
|
||
);
|
||
screenshotType = options.type;
|
||
} else if (options.path) {
|
||
const filePath = options.path;
|
||
const extension = filePath
|
||
.slice(filePath.lastIndexOf('.') + 1)
|
||
.toLowerCase();
|
||
if (extension === 'png') screenshotType = 'png';
|
||
else if (extension === 'jpg' || extension === 'jpeg')
|
||
screenshotType = 'jpeg';
|
||
assert(
|
||
screenshotType,
|
||
`Unsupported screenshot type for extension \`.${extension}\``
|
||
);
|
||
}
|
||
|
||
if (!screenshotType) screenshotType = 'png';
|
||
|
||
if (options.quality) {
|
||
assert(
|
||
screenshotType === 'jpeg',
|
||
'options.quality is unsupported for the ' +
|
||
screenshotType +
|
||
' screenshots'
|
||
);
|
||
assert(
|
||
typeof options.quality === 'number',
|
||
'Expected options.quality to be a number but found ' +
|
||
typeof options.quality
|
||
);
|
||
assert(
|
||
Number.isInteger(options.quality),
|
||
'Expected options.quality to be an integer'
|
||
);
|
||
assert(
|
||
options.quality >= 0 && options.quality <= 100,
|
||
'Expected options.quality to be between 0 and 100 (inclusive), got ' +
|
||
options.quality
|
||
);
|
||
}
|
||
assert(
|
||
!options.clip || !options.fullPage,
|
||
'options.clip and options.fullPage are exclusive'
|
||
);
|
||
if (options.clip) {
|
||
assert(
|
||
typeof options.clip.x === 'number',
|
||
'Expected options.clip.x to be a number but found ' +
|
||
typeof options.clip.x
|
||
);
|
||
assert(
|
||
typeof options.clip.y === 'number',
|
||
'Expected options.clip.y to be a number but found ' +
|
||
typeof options.clip.y
|
||
);
|
||
assert(
|
||
typeof options.clip.width === 'number',
|
||
'Expected options.clip.width to be a number but found ' +
|
||
typeof options.clip.width
|
||
);
|
||
assert(
|
||
typeof options.clip.height === 'number',
|
||
'Expected options.clip.height to be a number but found ' +
|
||
typeof options.clip.height
|
||
);
|
||
assert(
|
||
options.clip.width !== 0,
|
||
'Expected options.clip.width not to be 0.'
|
||
);
|
||
assert(
|
||
options.clip.height !== 0,
|
||
'Expected options.clip.height not to be 0.'
|
||
);
|
||
}
|
||
return this._screenshotTaskQueue.postTask(() =>
|
||
this._screenshotTask(screenshotType, options)
|
||
);
|
||
}
|
||
|
||
private async _screenshotTask(
|
||
format: 'png' | 'jpeg',
|
||
options?: ScreenshotOptions
|
||
): Promise<Buffer | string> {
|
||
await this._client.send('Target.activateTarget', {
|
||
targetId: this._target._targetId,
|
||
});
|
||
let clip = options.clip ? processClip(options.clip) : undefined;
|
||
let { captureBeyondViewport = true } = options;
|
||
captureBeyondViewport =
|
||
typeof captureBeyondViewport === 'boolean' ? captureBeyondViewport : true;
|
||
|
||
if (options.fullPage) {
|
||
const metrics = await this._client.send('Page.getLayoutMetrics');
|
||
// Fallback to `contentSize` in case of using Firefox.
|
||
const { width, height } = metrics.cssContentSize || metrics.contentSize;
|
||
|
||
// Overwrite clip for full page.
|
||
clip = { x: 0, y: 0, width, height, scale: 1 };
|
||
|
||
if (!captureBeyondViewport) {
|
||
const {
|
||
isMobile = false,
|
||
deviceScaleFactor = 1,
|
||
isLandscape = false,
|
||
} = this._viewport || {};
|
||
const screenOrientation: Protocol.Emulation.ScreenOrientation =
|
||
isLandscape
|
||
? { angle: 90, type: 'landscapePrimary' }
|
||
: { angle: 0, type: 'portraitPrimary' };
|
||
await this._client.send('Emulation.setDeviceMetricsOverride', {
|
||
mobile: isMobile,
|
||
width,
|
||
height,
|
||
deviceScaleFactor,
|
||
screenOrientation,
|
||
});
|
||
}
|
||
}
|
||
const shouldSetDefaultBackground =
|
||
options.omitBackground && format === 'png';
|
||
if (shouldSetDefaultBackground) {
|
||
await this._setTransparentBackgroundColor();
|
||
}
|
||
|
||
const result = await this._client.send('Page.captureScreenshot', {
|
||
format,
|
||
quality: options.quality,
|
||
clip,
|
||
captureBeyondViewport,
|
||
});
|
||
if (shouldSetDefaultBackground) {
|
||
await this._resetDefaultBackgroundColor();
|
||
}
|
||
|
||
if (options.fullPage && this._viewport)
|
||
await this.setViewport(this._viewport);
|
||
|
||
const buffer =
|
||
options.encoding === 'base64'
|
||
? result.data
|
||
: Buffer.from(result.data, 'base64');
|
||
|
||
if (options.path) {
|
||
if (!isNode) {
|
||
throw new Error(
|
||
'Screenshots can only be written to a file path in a Node environment.'
|
||
);
|
||
}
|
||
const fs = await helper.importFSModule();
|
||
await fs.promises.writeFile(options.path, buffer);
|
||
}
|
||
return buffer;
|
||
|
||
function processClip(
|
||
clip: ScreenshotClip
|
||
): ScreenshotClip & { scale: number } {
|
||
const x = Math.round(clip.x);
|
||
const y = Math.round(clip.y);
|
||
const width = Math.round(clip.width + clip.x - x);
|
||
const height = Math.round(clip.height + clip.y - y);
|
||
return { x, y, width, height, scale: 1 };
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Generatees a PDF of the page with the `print` CSS media type.
|
||
* @remarks
|
||
*
|
||
* NOTE: PDF generation is only supported in Chrome headless mode.
|
||
*
|
||
* To generate a PDF with the `screen` media type, call
|
||
* {@link Page.emulateMediaType | `page.emulateMediaType('screen')`} before
|
||
* calling `page.pdf()`.
|
||
*
|
||
* By default, `page.pdf()` generates a pdf with modified colors for printing.
|
||
* Use the
|
||
* {@link https://developer.mozilla.org/en-US/docs/Web/CSS/-webkit-print-color-adjust | `-webkit-print-color-adjust`}
|
||
* property to force rendering of exact colors.
|
||
*
|
||
*
|
||
* @param options - options for generating the PDF.
|
||
*/
|
||
async createPDFStream(options: PDFOptions = {}): Promise<Readable> {
|
||
const {
|
||
scale = 1,
|
||
displayHeaderFooter = false,
|
||
headerTemplate = '',
|
||
footerTemplate = '',
|
||
printBackground = false,
|
||
landscape = false,
|
||
pageRanges = '',
|
||
preferCSSPageSize = false,
|
||
margin = {},
|
||
omitBackground = false,
|
||
} = options;
|
||
|
||
let paperWidth = 8.5;
|
||
let paperHeight = 11;
|
||
if (options.format) {
|
||
const format = paperFormats[options.format.toLowerCase()];
|
||
assert(format, 'Unknown paper format: ' + options.format);
|
||
paperWidth = format.width;
|
||
paperHeight = format.height;
|
||
} else {
|
||
paperWidth = convertPrintParameterToInches(options.width) || paperWidth;
|
||
paperHeight =
|
||
convertPrintParameterToInches(options.height) || paperHeight;
|
||
}
|
||
|
||
const marginTop = convertPrintParameterToInches(margin.top) || 0;
|
||
const marginLeft = convertPrintParameterToInches(margin.left) || 0;
|
||
const marginBottom = convertPrintParameterToInches(margin.bottom) || 0;
|
||
const marginRight = convertPrintParameterToInches(margin.right) || 0;
|
||
|
||
if (omitBackground) {
|
||
await this._setTransparentBackgroundColor();
|
||
}
|
||
|
||
const result = await this._client.send('Page.printToPDF', {
|
||
transferMode: 'ReturnAsStream',
|
||
landscape,
|
||
displayHeaderFooter,
|
||
headerTemplate,
|
||
footerTemplate,
|
||
printBackground,
|
||
scale,
|
||
paperWidth,
|
||
paperHeight,
|
||
marginTop,
|
||
marginBottom,
|
||
marginLeft,
|
||
marginRight,
|
||
pageRanges,
|
||
preferCSSPageSize,
|
||
});
|
||
|
||
if (omitBackground) {
|
||
await this._resetDefaultBackgroundColor();
|
||
}
|
||
|
||
return helper.getReadableFromProtocolStream(this._client, result.stream);
|
||
}
|
||
|
||
/**
|
||
* @param {!PDFOptions=} options -
|
||
* @returns {!Promise<!Buffer>}
|
||
*/
|
||
async pdf(options: PDFOptions = {}): Promise<Buffer> {
|
||
const { path = undefined } = options;
|
||
const readable = await this.createPDFStream(options);
|
||
return await helper.getReadableAsBuffer(readable, path);
|
||
}
|
||
|
||
/**
|
||
* @returns The page's title
|
||
* @remarks
|
||
* Shortcut for {@link Frame.title | page.mainFrame().title()}.
|
||
*/
|
||
async title(): Promise<string> {
|
||
return this.mainFrame().title();
|
||
}
|
||
|
||
async close(
|
||
options: { runBeforeUnload?: boolean } = { runBeforeUnload: undefined }
|
||
): Promise<void> {
|
||
assert(
|
||
!!this._client._connection,
|
||
'Protocol error: Connection closed. Most likely the page has been closed.'
|
||
);
|
||
const runBeforeUnload = !!options.runBeforeUnload;
|
||
if (runBeforeUnload) {
|
||
await this._client.send('Page.close');
|
||
} else {
|
||
await this._client._connection.send('Target.closeTarget', {
|
||
targetId: this._target._targetId,
|
||
});
|
||
await this._target._isClosedPromise;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Indicates that the page has been closed.
|
||
* @returns
|
||
*/
|
||
isClosed(): boolean {
|
||
return this._closed;
|
||
}
|
||
|
||
get mouse(): Mouse {
|
||
return this._mouse;
|
||
}
|
||
|
||
/**
|
||
* This method fetches an element with `selector`, scrolls it into view if
|
||
* needed, and then uses {@link Page.mouse} to click in the center of the
|
||
* element. If there's no element matching `selector`, the method throws an
|
||
* error.
|
||
* @remarks 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:
|
||
* ```js
|
||
* const [response] = await Promise.all([
|
||
* page.waitForNavigation(waitOptions),
|
||
* page.click(selector, clickOptions),
|
||
* ]);
|
||
* ```
|
||
* Shortcut for {@link Frame.click | page.mainFrame().click(selector[, options]) }.
|
||
* @param selector - A `selector` to search for element to click. If there are
|
||
* multiple elements satisfying the `selector`, the first will be clicked
|
||
* @param options - `Object`
|
||
* @returns Promise which resolves when the element matching `selector` is
|
||
* successfully clicked. The Promise will be rejected if there is no element
|
||
* matching `selector`.
|
||
*/
|
||
click(
|
||
selector: string,
|
||
options: {
|
||
delay?: number;
|
||
button?: MouseButton;
|
||
clickCount?: number;
|
||
} = {}
|
||
): Promise<void> {
|
||
return this.mainFrame().click(selector, options);
|
||
}
|
||
|
||
/**
|
||
* This method fetches an element with `selector` and focuses it. If there's no
|
||
* element matching `selector`, the method throws an error.
|
||
* @param selector - A
|
||
* {@link https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors | selector }
|
||
* of an element to focus. If there are multiple elements satisfying the
|
||
* selector, the first will be focused.
|
||
* @returns Promise which resolves when the element matching selector is
|
||
* successfully focused. The promise will be rejected if there is no element
|
||
* matching selector.
|
||
* @remarks
|
||
* Shortcut for {@link Frame.focus | page.mainFrame().focus(selector)}.
|
||
*/
|
||
focus(selector: string): Promise<void> {
|
||
return this.mainFrame().focus(selector);
|
||
}
|
||
|
||
/**
|
||
* This method fetches an element with `selector`, scrolls it into view if
|
||
* needed, and then uses {@link Page.mouse} to hover over the center of the element.
|
||
* If there's no element matching `selector`, the method throws an error.
|
||
* @param selector - A
|
||
* {@link https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors | selector}
|
||
* to search for element to hover. If there are multiple elements satisfying
|
||
* the selector, the first will be hovered.
|
||
* @returns Promise which resolves when the element matching `selector` is
|
||
* successfully hovered. Promise gets rejected if there's no element matching
|
||
* `selector`.
|
||
* @remarks
|
||
* Shortcut for {@link Page.hover | page.mainFrame().hover(selector)}.
|
||
*/
|
||
hover(selector: string): Promise<void> {
|
||
return this.mainFrame().hover(selector);
|
||
}
|
||
|
||
/**
|
||
* 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.
|
||
*
|
||
* @example
|
||
* ```js
|
||
* page.select('select#colors', 'blue'); // single selection
|
||
* page.select('select#colors', 'red', 'green', 'blue'); // multiple selections
|
||
* ```
|
||
* @param selector - A
|
||
* {@link https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors | Selector}
|
||
* to query the page for
|
||
* @param values - 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
|
||
*
|
||
* @remarks
|
||
* Shortcut for {@link Frame.select | page.mainFrame().select()}
|
||
*/
|
||
select(selector: string, ...values: string[]): Promise<string[]> {
|
||
return this.mainFrame().select(selector, ...values);
|
||
}
|
||
|
||
/**
|
||
* This method fetches an element with `selector`, scrolls it into view if
|
||
* needed, and then uses {@link Page.touchscreen} to tap in the center of the element.
|
||
* If there's no element matching `selector`, the method throws an error.
|
||
* @param selector - A
|
||
* {@link https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors | Selector}
|
||
* to search for element to tap. If there are multiple elements satisfying the
|
||
* selector, the first will be tapped.
|
||
* @returns
|
||
* @remarks
|
||
* Shortcut for {@link Frame.tap | page.mainFrame().tap(selector)}.
|
||
*/
|
||
tap(selector: string): Promise<void> {
|
||
return this.mainFrame().tap(selector);
|
||
}
|
||
|
||
/**
|
||
* Sends a `keydown`, `keypress/input`, and `keyup` event for each character
|
||
* in the text.
|
||
*
|
||
* To press a special key, like `Control` or `ArrowDown`, use {@link Keyboard.press}.
|
||
* @example
|
||
* ```
|
||
* await page.type('#mytextarea', 'Hello');
|
||
* // Types instantly
|
||
* await page.type('#mytextarea', 'World', { delay: 100 });
|
||
* // Types slower, like a user
|
||
* ```
|
||
* @param selector - A
|
||
* {@link https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors | selector}
|
||
* of an element to type into. If there are multiple elements satisfying the
|
||
* selector, the first will be used.
|
||
* @param text - A text to type into a focused element.
|
||
* @param options - have property `delay` which is the Time to wait between
|
||
* key presses in milliseconds. Defaults to `0`.
|
||
* @returns
|
||
* @remarks
|
||
* Shortcut for {@link page.mainFrame().type(selector, text[, options])}
|
||
*/
|
||
type(
|
||
selector: string,
|
||
text: string,
|
||
options?: { delay: number }
|
||
): Promise<void> {
|
||
return this.mainFrame().type(selector, text, options);
|
||
}
|
||
|
||
/**
|
||
* @remarks
|
||
*
|
||
* This method behaves differently depending on the first parameter. If it's a
|
||
* `string`, it will be treated as a `selector` or `xpath` (if the string
|
||
* starts with `//`). This method then is a shortcut for
|
||
* {@link Page.waitForSelector} or {@link Page.waitForXPath}.
|
||
*
|
||
* If the first argument is a function this method is a shortcut for
|
||
* {@link Page.waitForFunction}.
|
||
*
|
||
* If the first argument is a `number`, it's treated as a timeout in
|
||
* milliseconds and the method returns a promise which resolves after the
|
||
* timeout.
|
||
*
|
||
* @param selectorOrFunctionOrTimeout - a selector, predicate or timeout to
|
||
* wait for.
|
||
* @param options - optional waiting parameters.
|
||
* @param args - arguments to pass to `pageFunction`.
|
||
*
|
||
* @deprecated Don't use this method directly. Instead use the more explicit
|
||
* methods available: {@link Page.waitForSelector},
|
||
* {@link Page.waitForXPath}, {@link Page.waitForFunction} or
|
||
* {@link Page.waitForTimeout}.
|
||
*/
|
||
waitFor(
|
||
selectorOrFunctionOrTimeout: string | number | Function,
|
||
options: {
|
||
visible?: boolean;
|
||
hidden?: boolean;
|
||
timeout?: number;
|
||
polling?: string | number;
|
||
} = {},
|
||
...args: SerializableOrJSHandle[]
|
||
): Promise<JSHandle> {
|
||
return this.mainFrame().waitFor(
|
||
selectorOrFunctionOrTimeout,
|
||
options,
|
||
...args
|
||
);
|
||
}
|
||
|
||
/**
|
||
* Causes your script to wait for the given number of milliseconds.
|
||
*
|
||
* @remarks
|
||
*
|
||
* It's generally recommended to not wait for a number of seconds, but instead
|
||
* use {@link Page.waitForSelector}, {@link Page.waitForXPath} or
|
||
* {@link Page.waitForFunction} to wait for exactly the conditions you want.
|
||
*
|
||
* @example
|
||
*
|
||
* Wait for 1 second:
|
||
*
|
||
* ```
|
||
* await page.waitForTimeout(1000);
|
||
* ```
|
||
*
|
||
* @param milliseconds - the number of milliseconds to wait.
|
||
*/
|
||
waitForTimeout(milliseconds: number): Promise<void> {
|
||
return this.mainFrame().waitForTimeout(milliseconds);
|
||
}
|
||
|
||
/**
|
||
* 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');
|
||
* (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();
|
||
* })();
|
||
* ```
|
||
* @param selector - A
|
||
* {@link https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Selectors | selector}
|
||
* of an element to wait for
|
||
* @param options - Optional waiting parameters
|
||
* @returns Promise which resolves when element specified by selector string
|
||
* is added to DOM. Resolves to `null` if waiting for hidden: `true` and
|
||
* selector is not found in DOM.
|
||
* @remarks
|
||
* 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`: ait 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 {@link Page.setDefaultTimeout} method.
|
||
*/
|
||
waitForSelector(
|
||
selector: string,
|
||
options: {
|
||
visible?: boolean;
|
||
hidden?: boolean;
|
||
timeout?: number;
|
||
} = {}
|
||
): Promise<ElementHandle | null> {
|
||
return this.mainFrame().waitForSelector(selector, 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
|
||
* ```js
|
||
* 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();
|
||
* })();
|
||
* ```
|
||
* @param xpath - A
|
||
* {@link https://developer.mozilla.org/en-US/docs/Web/XPath | xpath} of an
|
||
* element to wait for
|
||
* @param options - Optional waiting parameters
|
||
* @returns Promise which resolves when element specified by xpath string is
|
||
* added to DOM. Resolves to `null` if waiting for `hidden: true` and xpath is
|
||
* not found in DOM.
|
||
* @remarks
|
||
* The optional Argument `options` have properties:
|
||
*
|
||
* - `visible`: A boolean to 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`: A 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`: A number which is 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 {@link Page.setDefaultTimeout} method.
|
||
*/
|
||
waitForXPath(
|
||
xpath: string,
|
||
options: {
|
||
visible?: boolean;
|
||
hidden?: boolean;
|
||
timeout?: number;
|
||
} = {}
|
||
): Promise<ElementHandle | null> {
|
||
return this.mainFrame().waitForXPath(xpath, options);
|
||
}
|
||
|
||
/**
|
||
* The `waitForFunction` can be used to observe viewport size change:
|
||
*
|
||
* ```
|
||
* const puppeteer = require('puppeteer');
|
||
* (async () => {
|
||
* const browser = await puppeteer.launch();
|
||
* const page = await browser.newPage();
|
||
* const watchDog = page.waitForFunction('window.innerWidth < 100');
|
||
* await page.setViewport({ width: 50, height: 50 });
|
||
* await watchDog;
|
||
* await browser.close();
|
||
* })();
|
||
* ```
|
||
* To pass arguments from node.js to the predicate of `page.waitForFunction` function:
|
||
* ```
|
||
* const selector = '.foo';
|
||
* await page.waitForFunction(
|
||
* (selector) => !!document.querySelector(selector),
|
||
* {},
|
||
* selector
|
||
* );
|
||
* ```
|
||
* The predicate of `page.waitForFunction` can be asynchronous too:
|
||
* ```
|
||
* const username = 'github-username';
|
||
* await page.waitForFunction(
|
||
* async (username) => {
|
||
* const githubResponse = await fetch(
|
||
* `https://api.github.com/users/${username}`
|
||
* );
|
||
* const githubUser = await githubResponse.json();
|
||
* // show the avatar
|
||
* const img = document.createElement('img');
|
||
* img.src = githubUser.avatar_url;
|
||
* // wait 3 seconds
|
||
* await new Promise((resolve, reject) => setTimeout(resolve, 3000));
|
||
* img.remove();
|
||
* },
|
||
* {},
|
||
* username
|
||
* );
|
||
* ```
|
||
* @param pageFunction - Function to be evaluated in browser context
|
||
* @param options - Optional waiting parameters
|
||
* @param args - Arguments to pass to `pageFunction`
|
||
* @returns Promise which resolves when the `pageFunction` returns a truthy
|
||
* value. It resolves to a JSHandle of the truthy value.
|
||
*
|
||
* The optional waiting parameter can be:
|
||
*
|
||
* - `Polling`: 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:<br/>
|
||
* - `raf`: to constantly execute `pageFunction` in `requestAnimationFrame`
|
||
* callback. This is the tightest polling mode which is suitable to
|
||
* observe styling changes.<br/>
|
||
* - `mutation`: to execute pageFunction on every DOM mutation.
|
||
*
|
||
* - `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
|
||
* {@link Page.setDefaultTimeout | page.setDefaultTimeout(timeout)} method.
|
||
*
|
||
*/
|
||
waitForFunction(
|
||
pageFunction: Function | string,
|
||
options: {
|
||
timeout?: number;
|
||
polling?: string | number;
|
||
} = {},
|
||
...args: SerializableOrJSHandle[]
|
||
): Promise<JSHandle> {
|
||
return this.mainFrame().waitForFunction(pageFunction, options, ...args);
|
||
}
|
||
}
|
||
|
||
const supportedMetrics = new Set<string>([
|
||
'Timestamp',
|
||
'Documents',
|
||
'Frames',
|
||
'JSEventListeners',
|
||
'Nodes',
|
||
'LayoutCount',
|
||
'RecalcStyleCount',
|
||
'LayoutDuration',
|
||
'RecalcStyleDuration',
|
||
'ScriptDuration',
|
||
'TaskDuration',
|
||
'JSHeapUsedSize',
|
||
'JSHeapTotalSize',
|
||
]);
|
||
|
||
const unitToPixels = {
|
||
px: 1,
|
||
in: 96,
|
||
cm: 37.8,
|
||
mm: 3.78,
|
||
};
|
||
|
||
function convertPrintParameterToInches(
|
||
parameter?: string | number
|
||
): number | undefined {
|
||
if (typeof parameter === 'undefined') return undefined;
|
||
let pixels;
|
||
if (helper.isNumber(parameter)) {
|
||
// Treat numbers as pixel values to be aligned with phantom's paperSize.
|
||
pixels = /** @type {number} */ parameter;
|
||
} else if (helper.isString(parameter)) {
|
||
const text = /** @type {string} */ parameter;
|
||
let unit = text.substring(text.length - 2).toLowerCase();
|
||
let valueText = '';
|
||
if (unitToPixels.hasOwnProperty(unit)) {
|
||
valueText = text.substring(0, text.length - 2);
|
||
} else {
|
||
// In case of unknown unit try to parse the whole parameter as number of pixels.
|
||
// This is consistent with phantom's paperSize behavior.
|
||
unit = 'px';
|
||
valueText = text;
|
||
}
|
||
const value = Number(valueText);
|
||
assert(!isNaN(value), 'Failed to parse parameter value: ' + text);
|
||
pixels = value * unitToPixels[unit];
|
||
} else {
|
||
throw new Error(
|
||
'page.pdf() Cannot handle parameter type: ' + typeof parameter
|
||
);
|
||
}
|
||
return pixels / 96;
|
||
}
|