Discover AI-native insights at Testμ Conference‘25

How to use _initializePreview method in Playwright Internal

Best JavaScript code snippet using playwright-internal

dom.js

Source:dom.js

...185  constructor(context, objectId) {186    super(context, 'node', undefined, objectId)187    this._page = void 0188    this._page = context.frame._page189    this._initializePreview().catch((e) => {})190  }191  async _initializePreview() {192    const utility = await this._context.injectedScript()193    this._setPreview(194      await utility.evaluate(195        (injected, e) => 'JSHandle@' + injected.previewNode(e),196        this197      )198    )199  }200  asElement() {201    return this202  }203  async evaluateInUtility(pageFunction, arg) {204    try {205      const utility = await this._context.frame._utilityContext()...

server.js

Source:server.js

...119  debug('Machine ' + this.uuid + ' connect');120  this._initializeCommand(this.services.command);121  this._initializeStatus(this.services.status);122  this._initializeError(this.services.error);123  this._initializePreview(this.services.preview);124  this.isConnected = true;125};126Machine.prototype.disconnect = function() {127  if (!this.isConnected) { return; }128  debug('Machine ' + this.uuid + ' disconnect');129  this.clients.command.close();130  this.clients.status.close();131  this.clients.error.close();132  this.clients.preview.close();133  this.clients.command = undefined;134  this.clients.status = undefined;135  this.clients.error = undefined;136  this.clients.preview = undefined;137  this.isConnected = false;...

index.js

Source:index.js

...91  debug('Machine ' + this.uuid + ' connect');92  this._initializeCommand(this.services.command);93  this._initializeStatus(this.services.status);94  this._initializeError(this.services.error);95  this._initializePreview(this.services.preview);96  this.isConnected = true;97};98Machine.prototype.disconnect = function() {99  if (!this.isConnected) { return; }100  debug('Machine ' + this.uuid + ' disconnect');101  this.clients.command.close();102  this.clients.status.close();103  this.clients.error.close();104  this.clients.preview.close();105  this.clients.command = undefined;106  this.clients.status = undefined;107  this.clients.error = undefined;108  this.clients.preview = undefined;109  this.isConnected = false;...

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium._initializePreview();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.screenshot({ path: `example.png` });7  await browser.close();8})();

Using AI Code Generation

1const {chromium} = require('playwright');2(async () => {3  const browser = await chromium.launch({headless: false});4  const context = await browser.newContext();5  const page = await context.newPage();6  await page._initializePreview();7})();

Using AI Code Generation

1const { Playwright } = require('playwright-core/lib/server/playwright.js');2const { BrowserServer } = require('playwright-core/lib/server/browserServer.js');3const playwright = new Playwright();4const browserServer = await playwright._launchServer('chromium', { headless: false, args: ['--remote-debugging-port=9222'] });5const browser = await playwright._connectToBrowser(browserServer);6const { Page } = require('playwright-core/lib/server/page.js');7const page = await browser._defaultContext._initializePageInNewContext();8await page.screenshot({ path: 'exa

Using AI Code Generation

1const { Playwright } = require('playwright');2const playwright = new Playwright();3const browser = await playwright._initializePreview();4const { Playwright } = require('playwright');5const playwright = new Playwright();6const browser = await playwright._initializePreview();7const { Playwright } = require('playwright');8const playwright = new Playwright();9const browser = await playwright._initializePreview();10const { Playwright } = require('playwright');11const playwright = new Playwright();12const browser = await playwright._initializePreview();13const { Playwright } = require('playwright');14const playwright = new Playwright();15const browser = await playwright._initializePreview();16const { Playwright } = require('playwright');17const playwright = new Playwright();18const browser = await playwright._initializePreview();19const { Playwright } = require('playwright');20const playwright = new Playwright();21const browser = await playwright._initializePreview();22const { Playwright } = require('playwright');23const playwright = new Playwright();24const browser = await playwright._initializePreview();25const { Playwright } = require('playwright');26const playwright = new Playwright();27const browser = await playwright._initializePreview();28const { Playwright } = require('playwright');29const playwright = new Playwright();30const browser = await playwright._initializePreview();31const { Playwright } = require('playwright');32const playwright = new Playwright();33const browser = await playwright._initializePreview();34const { Playwright } = require('playwright');35const playwright = new Playwright();36const browser = await playwright._initializePreview();37const { Playwright }

Using AI Code Generation

1const playwright = require('playwright');2const { InternalAPI } = require('playwright/internal');3const { BrowserContext } = require('playwright/browsertype');4const { BrowserType } = require('playwright/browsertype');5const browserType = playwright.chromium;6const browser = await browserType.launch();7const context = await browser.newContext();8const page = await context.newPage();9await InternalAPI._initializePreview(page);10const playwright = require('playwright');11const { InternalAPI } = require('playwright/internal');12const { BrowserContext } = require('playwright/browsertype');13const { BrowserType } = require('playwright/browsertype');14const browserType = playwright.chromium;15const browser = await browserType.launch();16const context = await browser.newContext();17const page = await context.newPage();18await InternalAPI._initializePreview(page);19const playwright = require('playwright');20const { InternalAPI } = require('playwright/internal');21const { BrowserContext } = require('playwright/browsertype');22const { BrowserType } = require('playwright/browsertype');23const browserType = playwright.chromium;24const browser = await browserType.launch();25const context = await browser.newContext();26const page = await context.newPage();27await InternalAPI._initializePreview(page);28const playwright = require('playwright');29const { InternalAPI } = require('playwright/internal');30const { BrowserContext } = require('playwright/browsertype');31const { BrowserType } = require('playwright/browsertype');32const browserType = playwright.chromium;33const browser = await browserType.launch();34const context = await browser.newContext();35const page = await context.newPage();36await InternalAPI._initializePreview(page);37const playwright = require('playwright');38const { InternalAPI } = require('playwright/internal');39const { BrowserContext } = require('playwright/browsertype');40const { BrowserType } = require('playwright/browsertype');

Using AI Code Generation

1const { Playwright } = require('@playwright/test');2const { chromium } = require('playwright');3(async () => {4  const playwright = new Playwright();5  const browser = await chromium.launch();6  const context = await browser.newContext();7  const page = await context.newPage();8  await playwright._initializePreview(page);9  await page.screenshot({ path: 'preview.png' });10  await browser.close();11})();12const { chromium } = require('playwright');13(async () => {14  const browser = await chromium.launch();15  const context = await browser.newContext();16  const page = await context.newPage();17  await page.screenshot({ path: 'preview.png' });18  await browser.close();19})();

Playwright tutorial

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What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
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Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
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