Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Register for FREE! Join TestMu Conference

How to use genHandler method in Playwright Internal

Best JavaScript code snippet using playwright-internal

OsWindowReact.js

Source:OsWindowReact.js

...10        'theme',11        'windowState',12        'windowTitle',13      ];14      const genHandler = function genHandler(eventName) {15        return function inlineEventHandler(e) {16          const { [eventName]: handlerFn } = this.props;17          return handlerFn(e);18        };19      };20      this.eventHandlers = {21        hoverChange: genHandler('onHoverChange').bind(this),22        interactiveChange: genHandler('onInteractiveChange').bind(this),23        osThemeChange: genHandler('onOsThemeChange').bind(this),24        themeChange: genHandler('onThemeChange').bind(this),25        windowStateChange: genHandler('onWindowStateChange').bind(this),26        windowTitleChange: genHandler('onWindowTitleChange').bind(this),27      };28    }29    componentDidMount() {30      this.registerEventListeners();31    }32    componentDidUpdate(prevProps) {33      this.supportedProps.forEach((prop) => {34        const { [prop]: prevProp } = prevProps;35        const { [prop]: curProp } = this.props;36        if (prevProp !== curProp) {37          osWindowInstance[prop] = curProp;38        }39      });40    }...

60027.user.js

Source:60027.user.js

...38			var anchor = document.createElement("a");39			anchor.appendChild(document.createTextNode("\u005B+]"));40			anchor.style.cursor = 'pointer';41			anchor.title = 'Click to expand signature';42			anchor.addEventListener('click', genHandler(thissign), false);43			thissign.parentNode.insertBefore(anchor, thissign.previousSibling);44		// vBulletin 4.x (signaturecontainer) or phpBB v3, xenForo (signature) or discuss on modx.com (dis-signature)45		} else {46			if (nodes.snapshotItem(i).className=="signaturecontainer" || nodes.snapshotItem(i).classList.contains("signature") || nodes.snapshotItem(i).className=="dis-signature") {47				thissign = nodes.snapshotItem(i);48				thissign.style.display = 'none';49				var anchor = document.createElement("a");50				anchor.appendChild(document.createTextNode("\u005B+]"));51				anchor.style.cursor = 'pointer';52				anchor.title = 'Click to expand signature';53				anchor.addEventListener('click', genHandler(thissign), false);54				thissign.parentNode.insertBefore(anchor, thissign);55			}56		}57	}58})();596061function genHandler(signode) {62	return (function(event) {63			if(signode.style.display == 'none') {64			  signode.style.display='block';65			  // signode.removeAttribute("style");66			  this.firstChild.nodeValue=("[-]");67			  this.title = 'Click to collapse signature';68			 }69			else {70			  signode.style.display = 'none';71			  this.firstChild.nodeValue=("\u005B+]");72			  this.title = 'Click to expand signature';73		}74	});75}

132465.user.js

Source:132465.user.js

...31			var anchor = document.createElement("a");32			anchor.appendChild(document.createTextNode("[+]"));33			anchor.style.cursor = 'pointer';34			anchor.title = 'Click to expand signature';35			anchor.addEventListener('click', genHandler(thissign), false);36			thissign.parentNode.insertBefore(anchor, thissign.previousSibling);37		// vBulletin 4.x (signaturecontainer) or phpBB v3 (signature)38		} else {39			if (nodes.snapshotItem(i).className == "signaturecontainer" || nodes.snapshotItem(i).className == "signature") {40				thissign = nodes.snapshotItem(i);41				thissign.style.display = 'none';42				var anchor = document.createElement("a");43				anchor.appendChild(document.createTextNode("[+]"));44				anchor.style.cursor = 'pointer';45				anchor.title = 'Click to expand signature';46				anchor.addEventListener('click', genHandler(thissign), false);47				thissign.parentNode.insertBefore(anchor, thissign);48			}49		}50	}51})();525354function genHandler(signode) {55	return (function(event) {56			if(signode.style.display == 'none') {57			  signode.style.display = 'block';58			  this.firstChild.innerHTML = "[-]";59			  this.title = 'Click to collapse signature';60			 }61			else {62			  signode.style.display = 'none';63			  this.firstChild.innerHTML = "[+]";64			  this.title = 'Click to expand signature';65		}66	});
...

events.js

Source:events.js

...19}20export function genHandlers (events: ASTElementHandlers): string {21  let res = 'on:{'22  for (const name in events) {23    res += `"${name}":${genHandler(events[name])},`24  }25  return res.slice(0, -1) + '}'26}27function genHandler (28  handler: ASTElementHandler | Array<ASTElementHandler>29): string {30  if (!handler) {31    return 'function(){}'32  } else if (Array.isArray(handler)) {33    return `[${handler.map(genHandler).join(',')}]`34  } else if (!handler.modifiers) {35    return simplePathRE.test(handler.value)36      ? handler.value37      : `function($event){${handler.value}}`...

hidden.js

Source:hidden.js

...14    return new Promise(resolve => {15        if (document.hidden) {16            return done(VISIBILITY, 0);17        }18        addEventListener(window.document, VISIBILITY, genHandler(VISIBILITY));19        addEventListener(window, UNLOAD, genHandler(UNLOAD));20        function genHandler(type) {21            return ({22                timeStamp23            }) => done(type, timeStamp);24        }25        function done(type, timeStamp) {26            resolve({27                entryType: 'visibility',28                type,29                startTime: round(timeStamp)30            });31        }32    });...

co.js

Source:co.js

1import co from 'co'2function *genFunc(initValue) {3    let first = yield new Promise((resolve,reject) =>{4        setTimeout(resolve,1000,'first-'+initValue)5    })6    let second = yield new Promise((resolve,reject) =>{7        setTimeout(resolve,500,'second-'+initValue)8    })9    let third = yield new Promise((resolve,reject) =>{10        setTimeout(resolve,700,'third-'+initValue)11    })12}13co(genFunc(1)).then(value => {14    console.log(value)15})16//let genHandler = genFunc(1)17//genHandler.next().value è¿åä¸ä¸ªpromiseå¯¹è±¡18/*genHandler.next().value19    .then( value =>{20        console.log(value)21        genHandler.next().value22            .then(value =>{23                console.log(value)24                genHandler.next().value25                    .then(value => {26                        console.log(value)27                    })28            })...

5.连续运行的Generator.js

Source:5.连续运行的Generator.js

1function *genFunc(initValue) {2    let first = yield new Promise((resolve,reject) =>{3        debugger;4        setTimeout(resolve,1000,'first-'+initValue)5    })6    let second = yield new Promise((resolve,reject) =>{7        debugger;8        setTimeout(resolve,500,'second-'+initValue)9    })10    let third = yield new Promise((resolve,reject) =>{11        debugger;12        setTimeout(resolve,700,'third-'+initValue)13    })14}15let genHandler = genFunc(1)16//genHandler.next().value è¿åä¸ä¸ªpromiseå¯¹è±¡17genHandler.next().value18    .then( value =>{19        console.log(value)20        genHandler.next().value21            .then(value =>{22                console.log(value)23                genHandler.next().value24                    .then(value => {25                        console.log(value)26                    })27            })...

Using AI Code Generation

1const playwright = require("playwright");2(async () => {3  const browser = await playwright["chromium"].launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  const handle = await page.evaluateHandle(() => {7    const div = document.createElement("div");8    div.id = "foo";9    document.body.appendChild(div);10    return div;11  });12  const result = await handle.evaluate((node) => node.id);13  await browser.close();14})();15const playwright = require("playwright");16(async () => {17  const browser = await playwright["chromium"].launch();18  const context = await browser.newContext();19  const page = await context.newPage();20  const handle = await page.evaluateHandle(() => {21    const div = document.createElement("div");22    div.id = "foo";23    document.body.appendChild(div);24    return div;25  });26  const result = await handle.evaluate((node) => node.id);27  await browser.close();28})();29const playwright = require("playwright");30(async () => {31  const browser = await playwright["chromium"].launch();32  const context = await browser.newContext();33  const page = await context.newPage();34  const handle = await page.evaluateHandle(() => {35    const div = document.createElement("div");36    div.id = "foo";37    document.body.appendChild(div);38    return div;39  });40  const result = await handle.evaluate((node) => node.id);41  await browser.close();42})();43const playwright = require("playwright");44(async () => {45  const browser = await playwright["chromium"].launch();46  const context = await browser.newContext();47  const page = await context.newPage();48  const handle = await page.evaluateHandle(() => {49    const div = document.createElement("div");50    div.id = "foo";51    document.body.appendChild(div);52    return div;53  });54  const result = await handle.evaluate((node) => node.id);

Using AI Code Generation

1const playwright = require('playwright');2const { genHandler } = require('playwright/lib/server/frames');3(async () => {4  const browser = await playwright['chromium'].launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.evaluate(() => {8    const { genHandler } = window['playwright']['chromium'];9    const handler = genHandler('click', document.querySelector('input[type="submit"]'));10    handler();11  });12  await browser.close();13})();

Using AI Code Generation

1const { genHandler } = require('playwright/lib/server/chromium/crNetworkManager');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  await page.route('**/*', route => {7    const handler = genHandler(route.request());8    route.continue();9  });10  await browser.close();11})();12#### request.url()13#### request.resourceType()14#### request.method()15#### request.postData()16#### request.headers()17#### request.continue([overrides])18#### request.respond([response])19#### request.abort([errorCode])

Using AI Code Generation

1const { genHandler } = require('playwright/lib/client/transport');2const { Page } = require('playwright/lib/server/page');3const { BrowserContext } = require('playwright/lib/server/browserContext');4const { Browser } = require('playwright/lib/server/browser');5const { Playwright } = require('playwright/lib/server/playwright');6const { genHandler } = require('playwright/lib/client/transport');7const { Page } = require('playwright/lib/server/page');8const { BrowserContext } = require('playwright/lib/server/browserContext');9const { Browser } = require('playwright/lib/server/browser');10const { Playwright } = require('playwright/lib/server/playwright');11const { genHandler } = require('playwright/lib/client/transport');12const { Page } = require('playwright/lib/server/page');13const { BrowserContext } = require('playwright/lib/server/browserContext');14const { Browser } = require('playwright/lib/server/browser');15const { Playwright } = require('playwright/lib/server/playwright');16const { genHandler } = require('playwright/lib/client/transport');17const { Page } = require('playwright/lib/server/page');18const { BrowserContext } = require('playwright/lib/server/browserContext');19const { Browser } = require('playwright/lib/server/browser');20const { Playwright } = require('playwright/lib/server/playwright');21const { genHandler } = require('playwright/lib/client/transport');22const { Page } = require('playwright/lib/server/page');23const { BrowserContext } = require('playwright/lib/server/browserContext');24const { Browser } = require('playwright/lib/server/browser');25const { Playwright } = require('playwright/lib/server/playwright');26const { genHandler } = require('playwright/lib/client/transport');27const { Page } = require('playwright/lib/server/page');28const { BrowserContext } = require('playwright/lib/server/browserContext');29const { Browser } = require('playwright/lib/server/browser');30const { Playwright } = require('playwright/lib/server/playwright');

Using AI Code Generation

1const { genHandler } = require('playwright/lib/client/transport');2const { Page } = require('playwright/lib/server/page');3const { BrowserContext } = require('playwright/lib/server/browserContext');4const { Browser } = require('playwright/lib/server/browser');5const { Playwright } = require('playwright/lib/server/playwright');6const { genHandler } = require('playwright/lib/client/transport');7const { Page } = require('playwright/lib/server/page');8const { BrowserContext } = require('playwright/lib/server/browserContext');9const { Browser } = require('playwright/lib/server/browser');10const { Playwright } = require('playwright/lib/server/playwright');11const { genHandler } = require('playwright/lib/client/transport');12const { Page } = require('playwright/lib/server/page');13const { BrowserContext } = require('playwright/lib/server/browserContext');14const { Browser } = require('playwright/lib/server/browser');15const { Playwright } = require('playwright/lib/server/playwright');16const { genHandler } = require('playwright/lib/client/transport');17const { Page } = require('playwright/lib/server/page');18const { BrowserContext } = require('playwright/lib/server/browserContext');19const { Browser } = require('playwright/lib/server/browser');20const { Playwright } = require('playwright/lib/server/playwright');21const { genHandler } = require('playwright/lib/client/transport');22const { Page } = require('playwright/lib/server/page');23const { BrowserContext } = require('playwright/lib/server/browserContext');24const { Browser } = require('playwriplaywright

Using AI Code Generation

1const { genHandler } = require('playwright-core/lib/server/channels');2const { chromium } = require('ght/lib/se-core');3const fs = require('fs');4(async () => {5  const browser = await chromium.launch({ headless: false });6  const context = await browser.newContext();7  const page = await context.newPage();8  const fileChooser = await page.waitForFileChooser();9  const handler = genHandler('FileChooser', fileChooser);10  await handler.setFiles({ files: [fs.readFileSync('test.txt')] });11  await page.click('input[type="file"]');12  await page.screenshot({ path: 'example.png' });13  await browser.close();14})();15I hope this helps.rver/browser');16const { Playwright } = require('playwright/lib/server/playwright');17const { genHandler } = require('playwright/lib/client/transport');18const { Page } = require('playwright/lib/server/page');19const { BrowserContext } = require('playwright/lib/server/browserContext');20const { Browser } = require('playwright/lib/server/browser');21const { Playwright } = require('playwright/lib/server/playwright');

Using AI Code Generation

1const { genHandler } = require('@playwright/test/lib/server/chromium/crConnection');2const { Page } = require('@playwright/test/lib/server/chromium/crPage');3const { Frame } = require('@playwright/test/lib/server/chromium/crFrame');4const { ElementHandle } = require('@playwright/test/lib/server/chromium/crElementHandle');5const { JSHandle } = require('@playwright/test/lib/server/chromium/crJSHandle');6const { genHandler } = require('@playwright/test/lib/server/chromium/crConnection');7const { Page } = require('@playwright/test/lib/server/chromium/crPage');8const { Frame } = require('@playwright/test/lib/server/chromium/crFrame');9const { ElementHandle } = require('@playwright/test/lib/server/chromium/crElementHandle');10const { JSHandle } = require('@playwright/test/lib/server/chromium/crJSHandle');11const { genHandler } = require('@playwright/test/lib/server/chromium/crConnection');12const { Page } = require('@playwright/test/lib/server/chromium/crPage');13const { Frame } = require('@playwright/test/lib/server/chromium/crFrame');14const { ElementHandle } = require('@playwright/test/lib/server/chromium/crElementHandle');15const { JSHandle } = require('@playwright/test/lib/server/chromium/crJSHandle');16const { genHandler } = require('@playwright/test/lib/server/chromium/crConnection');17const { Page } = require('@playwright/test/lib/server/chromium/crPage');18const { Frame } = require('@playwright/test/lib/server/chromium/crFrame');19const { ElementHandle } = require('@playwright/test/lib/server/chromium/crElementHandle');20const { JSHandle } = require('@playwright/test/lib/server/chromium/crJSHandle');21const { genHandler } = require('@playwright/test/lib/server/chromium/crConnection');22const { Page } = require('@playwright/test/lib/server/chromium/crPage');23const { Frame } = require('@playwright/test/lib/server/chromium/crFrame');24const { ElementHandle } = require('@playwright

Using AI Code Generation

1const { genHandler } = require('playwright-core/lib/server/channels');2const { chromium } = require('playwright-core');3const fs = require('fs');4(async () => {5  const browser = await chromium.launch({ headless: false });6  const context = await browser.newContext();7  const page = await context.newPage();8  const fileChooser = await page.waitForFileChooser();9  const handler = genHandler('FileChooser', fileChooser);10  await handler.setFiles({ files: [fs.readFileSync('test.txt')] });11  await page.click('input[type="file"]');12  await page.screenshot({ path: 'example.png' });13  await browser.close();14})();

Using AI Code Generation

1const { genHandler } = require('@playwright/test/lib/server/trace/recorder');2const { chromium } = require('@playwright/test');3const { Page } = require('@playwright/test/lib/server/page');4const { BrowserContext } = require('@playwright/test/lib/server/browserContext');5const { Browser } = require('@playwright/test/lib/server/browser');6const { BrowserServer } = require('@playwright/test/lib/server/browserServer');7const browser = await chromium.launch();8const page = await browser.newPage();9const handler = genHandler(page);10const handler = genHandler(browser);11const handler = genHandler(browserServer);12The handler is a function that can be used with the `context.on()` method to listen to events. The handler can be used in the following way:13const { genHandler } = require('@playwright/test/lib/server/trace/recorder');14const { chromium } = require('@playwright/test');15const { Page } = require('@playwright/test/lib/server/page');16const { BrowserContext } = require('@playwright/test/lib/server/browserContext');17const { Browser } = require('@playwright/test/lib/server/browser');18const { BrowserServer } = require('@playwright/test/lib/server/browserServer');19const browser = await chromium.launch();20const page = await browser.newPage();21const handler = genHandler(page);22const handler = genHandler(browser);23const handler = genHandler(browserServer);24context.on('event-name', handler);25## How to use the handler with the `page.on()` method26The handler can be used with the `page.on()` method to listen to events. The handler can be used in the following way:27const { genHandler } = require('@playwright/test

Using AI Code Generation

1const { genHandler } = require('playwright/lib/server/chromium/crNetworkManager');2const handler = genHandler();3const { requestWillBeSent, responseReceived, loadingFinished } = handler;4const { genHandler } = require('playwright/lib/server/chromium/crNetworkManager');5const handler = genHandler();6const { requestWillBeSent, responseReceived, loadingFinished } = handler;

Using AI Code Generation

1const { genHandler } = require('@playwright/test');2const { page } = usePlaywright();3const myHandler = genHandler(page);4genHandler<T extends Page | Frame | Worker | BrowserContext>(target: T): T5const { genHandler } = require('@playwright/test');6const { page } = usePlaywright();7const myHandler = genHandler(page);8const { genHandler } = require('@playwright/test');9const { page } = usePlaywright();10const myHandler = genHandler(page);11const { genHandler } = require('@playwright/test');12const { page } = usePlaywright();13const myHandler = genHandler(page);

Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
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.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
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.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.