How to use getPooledEvent method in Playwright Internal

Best JavaScript code snippet using playwright-internal

event.js

Source:event.js Github

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1import { updateQueue } from './component';2// React 合成事件(异步调用事件,会有问题,需要用 e.persist())3/**4 * 源码使用的事件池的概念5 * const EVENT_POOL_SIZE = 10;6 * getPooledEvent 得到7 * releasePooledEvent 释放掉8 *9 * @param {*} dom10 * @param {*} eventType11 * @param {*} listener12 */13/**14 * 在React 中, 并不是把事件绑定在要绑定的DOM元素上 而是绑定到document 上,类似于事件委托15 * 为什么做合成事件?16 * 1. 可以屏蔽浏览器的差异,不同的浏览器绑定和触发事件的方法不一样17 * 2. 合成事件,可以实现事件对象的复用, 减少垃圾回收, 提高性能18 * 3. 因为默认要实现批量更新, 两个 setState 合并成一次更新,它也是在合成事件中实现的19 * @param {*} dom 要绑定事件的DOM节点20 * @param {*} eventType 事件的类型 比如onClick21 * @param {*} listener 事件处理函数22 */23export function addEvent(dom, eventType, listener) {24 eventType = eventType.toLowerCase();25 // 在绑定的dom节点上挂在一个对象, 准备存放监听函数26 let eventStore = dom.eventStore || (dom.eventStore = {});27 // eventStore.onclick = ()=>{ alert("click")}28 eventStore[eventType] = listener;29 // document.addEventListener('click')30 // 两个阶段: 先事件捕获, 在事件冒泡(false默认是冒泡)31 // 把事件都绑定到document上32 document.addEventListener(eventType.slice(2), dispatchEvent, false);33}34/**35 * 真正事件的触发的回调统一是这个 dispatchEvent36 * 所有的事件处理函数都会进入这个dispatchEvent37 * @param {*} event 就是原来的事件对象, 但是传递给我们的监听函数的并不是它38 */39// 也可以是事件池[], 默认长度为1040// 创建一个合成事件对象的缓存41let syntheticEvent = null;42function dispatchEvent(event) {43 // 从 原有的 event 事件对象中解构出 type(事件的类型) 和 target(作用的元素)44 let { type, target } = event;45 let eventType = 'on' + type; // onclick46 // 给syntheticEvent对象赋值47 syntheticEvent = getSyntheticEvent(event);48 // 在事件监听函数执行前,先进入批量更新模式49 updateQueue.isPending = true;50 // 容易引起内存泄漏51 while (target) {52 // 解构出监听函数对象53 let { eventStore } = target;54 // 从这个对象中 拿到监听函数55 let listener = eventStore && eventStore[eventType];56 // 如果点击的这个元素上有这个监听函数,就执行57 if (listener) {58 // 执行监听函数59 listener.call(target, syntheticEvent);60 }61 // 否则的话,就去父节点上找,所以又进入 while 循环62 target = target.parentNode;63 }64 // 等所有的监听函数执行完了,就清空所有的属性, 供下次复用此syntheticEvent对象(销毁)65 for (let key in syntheticEvent) {66 if (key !== 'persist') syntheticEvent[key] = null;67 }68 // 当事件处理函数执行完成之后,把批量更新改为false69 updateQueue.isPending = false;70 // 执行批量更新,就是把缓存的那个updater 全部执行了71 updateQueue.batchUpdater();72}73// 持久化合成事件源74function persist() {75 syntheticEvent = { persist };76}77// 获取合成事件对象78function getSyntheticEvent(nativeEvent) {79 // 懒加载一个 syntheticEvent 对象(为什么合成事件, 因为它会实现一个缓存)80 // 如果没有的话,也就是就第一次创建, 后边会复用81 if (!syntheticEvent) {82 // 就创建一个新的syntheticEvent对象83 // syntheticEvent = new SyntheticEvent();84 syntheticEvent = { persist };85 }86 syntheticEvent.nativeEvent = nativeEvent;87 syntheticEvent.currentTarget = nativeEvent.target;88 // 循环原生事件对象(把原生事件对象上的属性和方法都拷贝到合成事件对象上)89 for (let key in syntheticEvent) {90 // 如果这个原生 事件对象的某个属性的类型是函数91 if (typeof nativeEvent[key] == 'function') {92 // 绑定this 指针93 syntheticEvent[key] = nativeEvent[key].bind(nativeEvent);94 } else {95 syntheticEvent[key] = nativeEvent[key];96 }97 }98 return syntheticEvent;...

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SyntheticEvent.js

Source:SyntheticEvent.js Github

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...124 EventConstructor.eventPool = [];125 EventConstructor.getPooled = getPooledEvent;126 EventConstructor.release = releasePooledEvent;127}128function getPooledEvent(dispatchConfig, targetInst, nativeEvent, nativeInst) {129 const EventConstructor = this;130 if (EventConstructor.eventPool.length) {131 const instance = EventConstructor.eventPool.pop();132 EventConstructor.call(133 instance,134 dispatchConfig,135 targetInst,136 nativeEvent,137 nativeInst,138 );139 return instance;140 }141 return new EventConstructor(142 dispatchConfig,...

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7772.js

Source:7772.js Github

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1{2 EventConstructor.eventPool = [];3 EventConstructor.getPooled = getPooledEvent;4 EventConstructor.release = releasePooledEvent;...

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Using AI Code Generation

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1const { InternalEventEmitter } = require('playwright/lib/internal/events');2const { getTestState } = require('playwright/lib/test/state');3const { test } = require('playwright/lib/test/test');4const { expect } = require('playwright/lib/test/chai');5test('test', async ({ page }) => {6 const eventEmitter = await getTestState(page)._eventEmitter;7 const event = await eventEmitter.getPooledEvent('request', (request) => request.url().includes('google'));8});9#### eventEmitter.on(event, handler)10const { InternalEventEmitter } = require('playwright/lib/internal/events');11const { test } = require('playwright/lib/test/test');12const { expect } = require('playwright/lib/test/chai');13test('test', async ({ page }) => {14 const eventEmitter = await page._eventEmitter;15 eventEmitter.on('request', (request) => {16 });17});18#### eventEmitter.off(event, handler)19const { InternalEventEmitter } = require('playwright/lib/internal/events');20const { test } = require('playwright/lib/test/test');21const { expect } = require('playwright/lib/test/chai');22test('test', async ({ page }) => {23 const eventEmitter = await page._eventEmitter;24 const handler = (request) => {25 };26 eventEmitter.on('request', handler);27 eventEmitter.off('request', handler);28});29#### eventEmitter.once(event, handler)

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Using AI Code Generation

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1const { getPooledEvent } = require('playwright-core/lib/server/events');2const event = getPooledEvent('page', 'request', (page) => {3 page.on('request', (request) => {4 console.log(request.url());5 });6});7event.emit('page', page);8const { getPooledEvent } = require('playwright-core/lib/server/events');

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Using AI Code Generation

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1const playwright = require('playwright');2const { getEventObject } = require('playwright/lib/internal/protocol/serializers');3const { getPooledEvent } = require('playwright/lib/internal/protocol/serializers');4const { events } = require('playwright/lib/internal/protocol/serializers');5const event = getPooledEvent(events.BrowserContextEvent, 'targetcreated', {6 targetInfo: {7 }8});9console.log(event);10const eventObject = getEventObject(event);11console.log(eventObject);12BrowserContextEvent {13 _targetInfo: {14 }15}16{17 targetInfo: {18 },19}20- [Playwright Internal](

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Using AI Code Generation

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1const { getPooledEvent } = require('@playwright/test/lib/server/trace/recorder/events');2const event = getPooledEvent('page', 'load');3event.timestamp = 12345;4event.stack = 'at <anonymous>:1:1';5event.emit();6const { test, expect } = require('@playwright/test');7test('verify event', async ({ page }) => {8 const events = await page.context().tracing.getEvents();9 expect(events).toContainEqual({10 });11});12### `getPooledEvent(type: string, name: string)`

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Using AI Code Generation

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1const { getPooledEvent } = require('@playwright/test/lib/server/events');2const event = getPooledEvent();3event.init('test', true, true, { foo: 'bar' });4event.target.dispatchEvent(event);5 ✕ test (1ms)6 2 | const { getPooledEvent } = require('@playwright/test/lib/server/events');7 3 | const event = getPooledEvent();8 > 4 | event.init('test', true, true, { foo: 'bar' });9 5 | event.target.dispatchEvent(event);10 at Object.<anonymous> (test.js:4:8)

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Using AI Code Generation

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1const { getPooledEvent } = require('playwright/lib/server/events');2const event = getPooledEvent('myEvent');3event.init('myEvent', true, true, { myData: 'hello' });4document.dispatchEvent(event);5const { test } = require('@playwright/test');6test('my test', async ({ page }) => {7 await page.goto('/index.html');8 await page.waitForEvent('myEvent');9});

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Using AI Code Generation

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1const { getPooledEvent } = require('playwright/lib/server/events');2const event = await getPooledEvent(page, 'request');3console.log(event.url);4const { getPooledEvent } = require('playwright/lib/server/events');5const event = await getPooledEvent(page, 'request');6console.log(event.url);7### `getPooledEvent(page, event)`

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Using AI Code Generation

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1const { getPooledEvent } = require('playwright/lib/internal/inspectorInstrumentation');2const { emit } = require('events');3const { getEventListeners } = require('events');4const { getEventListeners } = require('events');5const { getEventListeners } = require('events');6const { getEventListeners } = require('events');7const { getEventListeners } = require('events');8const { getEventListeners } = require('events');9const { getEventListeners } = require('events');10const { getEventListeners } = require('events');11const { getEventListeners } = require('events');12const { getEventListeners } = require('events');13const { getEventListeners } = require('events');14const { getEventListeners } = require('events');15const { getEventListeners } = require('events');16const { getEventListeners } = require('events');17const { getEventListeners } = require('events');18const { getEventListeners } = require('events');19const { getEventListeners } = require('events');20const { getEventListeners } = require('events');21const { getEventListeners } = require('events');

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