How to use listenToNativeEvent method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactDOMEventHandle.js

Source: ReactDOMEventHandle.js Github

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...84 }85 if (targetContainer.nodeType === COMMENT_NODE) {86 targetContainer = ((targetContainer.parentNode ) );87 }88 listenToNativeEvent(89 domEventName,90 isCapturePhaseListener,91 targetContainer,92 targetElement,93 );94 }95}96function registerReactDOMEvent(97 target ,98 domEventName ,99 isCapturePhaseListener ,100) {101 /​/​ Check if the target is a DOM element.102 if ((target ).nodeType === ELEMENT_NODE) {103 if (!enableEagerRootListeners) {104 const targetElement = ((target ) );105 /​/​ Check if the DOM element is managed by React.106 const targetFiber = getClosestInstanceFromNode(targetElement);107 if (targetFiber === null) {108 if (__DEV__) {109 console.error(110 'ReactDOM.createEventHandle: setListener called on an element ' +111 'target that is not managed by React. Ensure React rendered the DOM element.',112 );113 }114 return;115 }116 registerEventOnNearestTargetContainer(117 targetFiber,118 domEventName,119 isCapturePhaseListener,120 targetElement,121 );122 }123 } else if (enableScopeAPI && isReactScope(target)) {124 if (!enableEagerRootListeners) {125 const scopeTarget = ((target ) );126 const targetFiber = getFiberFromScopeInstance(scopeTarget);127 if (targetFiber === null) {128 /​/​ Scope is unmounted, do not proceed.129 return;130 }131 registerEventOnNearestTargetContainer(132 targetFiber,133 domEventName,134 isCapturePhaseListener,135 null,136 );137 }138 } else if (isValidEventTarget(target)) {139 const eventTarget = ((target ) );140 /​/​ These are valid event targets, but they are also141 /​/​ non-managed React nodes.142 listenToNativeEvent(143 domEventName,144 isCapturePhaseListener,145 eventTarget,146 null,147 IS_EVENT_HANDLE_NON_MANAGED_NODE,148 );149 } else {150 invariant(151 false,152 'ReactDOM.createEventHandle: setter called on an invalid ' +153 'target. Provide a valid EventTarget or an element managed by React.',154 );155 }156}...

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DOMPluginEvnentSystem.js

Source: DOMPluginEvnentSystem.js Github

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...16 allNativeEvents.forEach((domEventName) => {17 console.log(domEventName)18 if (!noDelegateEvents.has(domEventName)) {19 /​/​ 监听container的冒泡阶段domEventName(click)事件20 listenToNativeEvent(domEventName, false, container)21 }22 /​/​ 监听捕获事件23 listenToNativeEvent(domEventName, true, container)24 })25}26function listenToNativeEvent(27 domEventName,28 isCapturePhaseListener,29 rootContainerElement,30 eventSystemFlags = 0 /​/​ 事件系统标识31) {32 /​/​ 同一个容器上的同一个阶段的同一个事件只绑定一次33 let listenerSet = getEventListenerSet(rootContainerElement)34 let listenerSetKey = getListenerSetKey(domEventName, isCapturePhaseListener)35 if (!listenerSet.has(listenerSetKey)) { 36 /​/​ 如果没有绑定过,就添加上这个key37 if (isCapturePhaseListener) {38 eventSystemFlags |= IS_CAPTURE_PHASE /​/​ let a = 1; a+=239 }40 addTrappedEventListener(...

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ReactDOM.js

Source: ReactDOM.js Github

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...109 /​/​ We handle selectionchange separately because it110 /​/​ doesn't bubble and needs to be on the document.111 if(domEventName !== 'selectionchange') {112 if(!nonDelegatedEvents.has(domEventName)) {113 listenToNativeEvent(domEventName, false, rootContainerElement)114 }115 listenToNativeEvent(domEventName, true, rootContainerElement) 116 }117 })118 const ownerDocument = rootContainerElement.nodeType === DOCUMENT_NODE ? rootContainerElement : rootContainerElement.ownerDocument119 if (ownerDocument !== null) {120 /​/​ The selectionchange event also needs deduplication121 /​/​ but it is attached to the document.122 if (!ownerDocument[listeningMarker]) {123 ownerDocument[listeningMarker] = true 124 listenToNativeEvent('selectionchange', false, ownerDocument)125 }126 }127 }128}129const IS_CAPTURE_PHASE = 1 << 2;130function listenToNativeEvent(domEventName, isCapturePhaseListener, target) {131 let eventSystemFlags = 0 132 if (isCapturePhaseListener) {133 eventSystemFlags |= IS_CAPTURE_PHASE134 }135 /​/​ ...136 /​/​ addTrappedEventListener(137 /​/​ target,138 /​/​ domEventName,139 /​/​ eventSystemFlags,140 /​/​ isCapturePhaseListener141 /​/​ )142}143export {144 render...

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ReactDOMRoot.js

Source: ReactDOMRoot.js Github

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...28 return root29}30function listenToAllSupportedEvents(rootContainerElement) {31 allNativeEvents.forEach(domEventName => {32 listenToNativeEvent(33 domEventName,34 true,35 rootContainerElement,36 null37 )38 })39}40function listenToNativeEvent(41 domEventName,42 isCapture,43 rootTarget,44 target45) {46 target = target || rootTarget47 const listener = createListener(domEventName, rootTarget)48 target.addEventListener(domEventName, listener)49}50function createListener(51 domEventName,52 targetContainer53) {54 return dispatchEvent.bind(null, domEventName, null, targetContainer)...

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DOMPluginEventSystem.js

Source: DOMPluginEventSystem.js Github

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...7 rootContainerElement[listeningMarker] = true;8 allNativeEvents.forEach((domEventName) => {9 if (domEventName !== 'selectionchange') {10 if (!nonDelegatedEvents.has(domEventName)) {11 listenToNativeEvent(domEventName, false, rootContainerElement);12 }13 listenToNativeEvent(domEventName, true, rootContainerElement);14 }15 });16 /​/​ DOCUMENT_NODE : 917 const ownerDocument =18 rootContainerElement.nodeType === DOCUMENT_NODE ? rootContainerElement : rootContainerElement.ownerDocument;19 if (ownerDocument !== null) {20 if (!ownerDocument[listeningMarker]) {21 ownerDocument[listeningMarker] = true;22 listenToNativeEvent('selectionchange', true, ownerDocument);23 }24 }25 }26}...

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Using AI Code Generation

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1const playwright = require('playwright');2(async () => {3 const browser = await playwright.chromium.launch({ headless: false });4 const context = await browser.newContext();5 const page = await context.newPage();6 await page.listenToNativeEvent('console', msg => {7 console.log(msg);8 });9 await page.evaluate(() => {10 console.log('Hello world');11 });12 await browser.close();13})();14{ type: 'log',15 [ { type: 'string',16 description: 'Hello world' } ] }

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Using AI Code Generation

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1const playwright = require('playwright');2(async () => {3 const browser = await playwright.chromium.launch({headless: false});4 const page = await browser.newPage();5 await page.listenToNativeEvent('page', 'load');6 await page.waitForNavigation();7 await browser.close();8})();9const playwright = require('playwright');10(async () => {11 const browser = await playwright.chromium.launch({headless: false});12 const context = await browser.newContext();13 const page = await context.newPage();14 await page.listenToNativeEvent('page', 'load');15 await page.waitForNavigation();16 await context.close();17 await browser.close();18})();19const playwright = require('playwright');20(async () => {21 const browser = await playwright.chromium.launch({headless: false});22 const context = await browser.newContext();23 const page = await context.newPage();24 await page.listenToNativeEvent('page', 'load');25 await page.waitForNavigation();26 await context.close();27 await browser.close();28})();29const playwright = require('playwright');30(async () => {31 const browser = await playwright.chromium.launch({headless: false});32 const context = await browser.newContext();33 const page = await context.newPage();34 await page.listenToNativeEvent('page', 'load');35 await page.waitForNavigation();36 await context.close();37 await browser.close();38})();39const playwright = require('playwright');40(async () => {41 const browser = await playwright.chromium.launch({headless: false});42 const context = await browser.newContext();43 const page = await context.newPage();44 await page.listenToNativeEvent('page', 'load');45 await page.waitForNavigation();46 await context.close();47 await browser.close();48})();49const playwright = require('play

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Using AI Code Generation

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1const { listenToNativeEvent } = require('playwright/​lib/​server/​chromium/​crBrowser');2const { chromium } = require('playwright');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 const eventPromise = listenToNativeEvent(page, 'DevTools');8 const event = await eventPromise;9 console.log(event);10})();11const { listenToNativeEvent } = require('playwright/​lib/​server/​chromium/​crBrowser');12const { chromium } = require('playwright');13(async () => {14 const browser = await chromium.launch();15 const context = await browser.newContext();16 const eventPromise = listenToNativeEvent(context, 'DevTools');17 await context.newPage();18 const event = await eventPromise;19 console.log(event);20})();21const { listenToNativeEvent } = require('playwright/​lib/​server/​chromium/​crBrowser');22const { chromium } = require('playwright');23(async () => {24 const browser = await chromium.launch();25 const eventPromise = listenToNativeEvent(browser, 'DevTools');26 const context = await browser.newContext();27 await context.newPage();28 const event = await eventPromise;29 console.log(event);

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Using AI Code Generation

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1const playwright = require('playwright');2const { listenToNativeEvent } = require('playwright/​lib/​server/​playwright');3(async () => {4 const browser = await playwright['chromium'].launch();5 const page = await browser.newPage();6 listenToNativeEvent('console', (event) => {7 console.log(event.message);8 });9 await page.evaluate(() => {10 console.log('hello world');11 });12 await browser.close();13})();

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Using AI Code Generation

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1const playwright = require('playwright');2const { Page } = require('playwright/​lib/​server/​page');3const { chromium } = require('playwright');4(async () => {5 const browser = await chromium.launch();6 const context = await browser.newContext();7 const page = await context.newPage();8 await page.listenToNativeEvent('pageerror', () => console.log('pageerror'));9 await page.evaluate(() => console.log(1) + 1);10 await browser.close();11})();12const { Page } = require('playwright/​lib/​server/​page');13const { PageChannel } = require('playwright/​lib/​server/​page');14const { PageDispatcher } = require('playwright/​lib/​server/​pageDispatcher');15Page.prototype.listenToNativeEvent = function (eventName, callback) {16 this._pageChannel.listenToNativeEvent(eventName, callback);17};18PageChannel.prototype.listenToNativeEvent = function (eventName, callback) {19 this._connection.listenToNativeEvent(this._page, eventName, callback);20};21PageDispatcher.prototype.listenToNativeEvent = function (eventName, callback) {22 this._connection.listenToNativeEvent(this._page, eventName, callback);23};24export class BrowserChannel extends Channel {25 listenToNativeEvent(eventName, callback) {26 this._connection.listenToNativeEvent(this._browser, eventName, callback);27 }28}29export class BrowserContextChannel extends Channel {30 listenToNativeEvent(eventName, callback) {31 this._connection.listenToNativeEvent(this._context, eventName, callback);32 }33}34export class PageChannel extends Channel {35 listenToNativeEvent(eventName, callback) {36 this._connection.listenToNativeEvent(this._page, eventName, callback);37 }38}39export class WKPage extends Page {40 listenToNativeEvent(eventName, callback) {41 this._pageChannel.listenToNativeEvent(eventName, callback);42 }43}44export class WKPageChannel extends PageChannel {45 listenToNativeEvent(eventName, callback) {46 this._connection.listenToNativeEvent(this._page, eventName, callback);47 }48}49export class WKConnection extends Connection {50 listenToNativeEvent(page

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Using AI Code Generation

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1const playwright = require('playwright');2(async () => {3 const browser = await playwright.webkit.launch();4 const context = await browser.newContext();5 const page = await context.newPage();6 await page.listenToNativeEvent('consoleMessageAdded', (event) => {7 console.log(event);8 });9 await page.evaluate(() => console.log('hello world'));10 await browser.close();11})();12{ type: 'consoleMessageAdded',13 { type: 'log',14 columnNumber: 1 } } }15const playwright = require('playwright');16(async () => {17 const browser = await playwright.webkit.launch();18 const context = await browser.newContext();19 const page = await context.newPage();20 await page.listenToNativeEvent('pageerror', (event) => {21 console.log(event);22 });23 await page.evaluate(() => console.log('hello world'));

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Using AI Code Generation

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1const { listenToNativeEvent } = require('playwright');2listenToNativeEvent('window', 'keydown', (event) => {3 console.log(event);4});5const { listenToNativeEvents } = require('playwright');6listenToNativeEvents('window', 'keydown', (event) => {7 console.log(event);8});9const { listenToNativeEvents } = require('playwright');10listenToNativeEvents('window', 'keydown', (event) => {11 console.log(event);12});13const { listenToNativeEvents } = require('playwright');14listenToNativeEvents('window', 'keydown', (event) => {15 console.log(event);16});17const { listenToNativeEvents } = require('playwright');18listenToNativeEvents('window', 'keydown', (event) => {19 console.log(event);20});21const { listenToNativeEvents } = require('playwright');22listenToNativeEvents('window', 'keydown', (event) => {23 console.log(event);24});25const { listenToNativeEvents } = require('playwright');26listenToNativeEvents('window', 'keydown', (event) => {27 console.log(event);28});29const { listenToNativeEvents } = require('playwright');30listenToNativeEvents('window', 'keydown', (event) => {31 console.log(event);32});33const { listenToNativeEvents } = require('playwright');34listenToNativeEvents('window', 'keydown', (event) => {35 console.log(event);36});37const { listenToNativeEvents } = require('playwright');38listenToNativeEvents('window', 'keydown', (event) => {39 console.log(event);40});41const { listenToNativeEvents }

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Using AI Code Generation

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1import { listenToNativeEvent } from 'playwright/​internal';2listenToNativeEvent('dialog', (event) => {3 console.log(event);4});5listenToNativeEvent('request', (event) => {6 console.log(event);7});8listenToNativeEvent('response', (event) => {9 console.log(event);10});11listenToNativeEvent('console', (event) => {12 console.log(event);13});14listenToNativeEvent('download', (event) => {15 console.log(event);16});17listenToNativeEvent('pageerror', (event) => {18 console.log(event);19});20listenToNativeEvent('error', (event) => {21 console.log(event);22});23listenToNativeEvent('close', (event) => {24 console.log(event);25});26listenToNativeEvent('crash', (event) => {27 console.log(event);28});29listenToNativeEvent('load', (event) => {30 console.log(event);31});32listenToNativeEvent('popup', (event) => {33 console.log(event);34});35listenToNativeEvent('requestfailed', (event) => {36 console.log(event);37});38listenToNativeEvent('requestfinished', (event) => {39 console.log(event);40});41listenToNativeEvent('request', (event) => {42 console.log(event);43});44listenToNativeEvent('response', (event) => {45 console.log(event);46});

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Using AI Code Generation

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1const { listenToNativeEvent } = require('@playwright/​test/​lib/​nativeEvents');2listenToNativeEvent('myEventName', (event) => {3 console.log('Event Received:', event);4});5const { triggerNativeEvent } = require('@playwright/​test/​lib/​nativeEvents');6triggerNativeEvent('myEventName', { detail: 'Event triggered' });7const { listenToNativeEvents } = require('@playwright/​test/​lib/​nativeEvents');8listenToNativeEvents(['myEventName1', 'myEventName2'], (event) => {9 console.log('Event Received:', event);10});11const { triggerNativeEvent } = require('@playwright/​test/​lib/​nativeEvents');12triggerNativeEvent('myEventName1', { detail: 'Event triggered' });13triggerNativeEvent('myEventName2', { detail: 'Event triggered' });14const { listenToNativeEvent } = require('@playwright/​test/​lib/​nativeEvents');15listenToNativeEvent('myEventName', (event) => {16 console.log('Event Received:', event);17});18const { listenToNativeEvents } = require('@playwright/​test/​lib/​nativeEvents');19listenToNativeEvents(['myEventName1

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StackOverFlow community discussions

Questions
Discussion

Jest + Playwright - Test callbacks of event-based DOM library

firefox browser does not start in playwright

Is it possible to get the selector from a locator object in playwright?

How to run a list of test suites in a single file concurrently in jest?

Running Playwright in Azure Function

firefox browser does not start in playwright

This question is quite close to a "need more focus" question. But let's try to give it some focus:

Does Playwright has access to the cPicker object on the page? Does it has access to the window object?

Yes, you can access both cPicker and the window object inside an evaluate call.

Should I trigger the events from the HTML file itself, and in the callbacks, print in the DOM the result, in some dummy-element, and then infer from that dummy element text that the callbacks fired?

Exactly, or you can assign values to a javascript variable:

const cPicker = new ColorPicker({
  onClickOutside(e){
  },
  onInput(color){
    window['color'] = color;
  },
  onChange(color){
    window['result'] = color;
  }
})

And then

it('Should call all callbacks with correct arguments', async() => {
    await page.goto(`http://localhost:5000/tests/visual/basic.html`, {waitUntil:'load'})

    // Wait until the next frame
    await page.evaluate(() => new Promise(requestAnimationFrame))

    // Act
   
    // Assert
    const result = await page.evaluate(() => window['color']);
    // Check the value
})
https://stackoverflow.com/questions/65477895/jest-playwright-test-callbacks-of-event-based-dom-library

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