How to use flushSchedulerQueue method in Playwright Internal

Best JavaScript code snippet using playwright-internal

Watcher.js

Source: Watcher.js Github

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1/​/​ class Watcher {2/​/​ constructor(vm, exp, callback) {3/​/​ this.vm = vm;4/​/​ this.exp = exp;5/​/​ this.callback = callback;6/​/​ /​/​ 更改前的值7/​/​ this.value = this.get();8/​/​ }9/​/​ get() {10/​/​ /​/​ 将当前的 watcher 添加到 Dep 类的静态属性上11/​/​ Dep.target = this;12/​/​ /​/​ 获取值触发数据劫持13/​/​ console.log(this.exp,'Watcher-----')14/​/​ let value = CompileUtil.getVal(this.vm, this.exp);15/​/​ /​/​ 清空 Dep 上的 Watcher,防止重复添加16/​/​ Dep.target = null;17/​/​ return value;18/​/​ }19/​/​ update() {20/​/​ /​/​ 获取新值21/​/​ let newValue = CompileUtil.getVal(this.vm, this.exp);22/​/​ /​/​ 获取旧值23/​/​ let oldValue = this.value;24/​/​ /​/​ 如果新值和旧值不相等,就执行 callback 对 dom 进行更新25/​/​ if(newValue !== oldValue) {26/​/​ this.callback(newValue);27/​/​ }28/​/​ }29/​/​ }30/​/​ 用react或vue 实现一个分页组件31/​/​ 要求:32/​/​ 需要支持两种模式:总数已知(有尾页)和总数未知(只有上一页和下一页)33/​/​ 组件支持内部直接跳转到目标页34/​/​ 组件支持外部跳转到目标页35/​/​ 组件拥有修改每页数量的下拉框36/​/​ 组件样式可以支持自定义37/​/​ 点击每个按钮都需要有回调38/​/​ 尽可能地减少接入方的接入成本39let uid = 0;40class Watcher {41 constructor (vm, exp, callback) {42 this.id = ++uid;43 this.vm = vm;44 this.exp = exp;45 this.callback = callback;46 /​/​ 更改前的值47 this.value = this.get();48 }49 get() {50 /​/​ 将当前的 watcher 添加到 Dep 类的静态属性上51 Dep.target = this;52 /​/​ 获取值触发数据劫持53 console.log(this.exp,'Watcher-----')54 let value = CompileUtil.getVal(this.vm, this.exp);55 /​/​ 清空 Dep 上的 Watcher,防止重复添加56 Dep.target = null;57 return value;58 }59 update () {60 console.log('watch' + this.id + ' update');61 /​/​ 1. 判断 has {} 是否 包含这个 watch.id62 /​/​ 2. 把 watch push 进 queue 数组63 /​/​ 3. nextTick(flushSchedulerQueue) 进行 批量 更新64 /​/​ 4. nextTick(cb) -> callbacks.push(cb) -> setTimeout(flushCallbacks, 0)65 /​/​ 5. flushCallbacks() -> 深拷贝 callbacks[] 得到 copies -> copies[i]() (cb 开始执行) 66 /​/​ 6. flushSchedulerQueue 循环 queue 队列 -> 找到每个 watch -> 找到 watch.id -> 清空 has[id] = null -> 执行 watch.run()67 queueWatcher(this);68 }69 run () {70 console.log('watch' + this.id + '视图更新啦~');71 let newValue = CompileUtil.getVal(this.vm, this.exp);72 /​/​ 获取旧值73 let oldValue = this.value;74 /​/​ 如果新值和旧值不相等,就执行 callback 对 dom 进行更新75 if(newValue !== oldValue) {76 this.callback(newValue);77 }78 }79}80let callbacks = []; /​/​ 存放 批量 更新函数 flushSchedulerQueue81let pending = false;82function nextTick (cb) {83 callbacks.push(cb);84 console.log(queue,'queue111')85 if (!pending) {86 pending = true;87 console.log(queue,'queue22')88 setTimeout(flushCallbacks, 0);89 }90}91function flushCallbacks () {92 console.log(queue,'queue333')93 pending = false;94 /​/​ 复制 callbacks(存放 批量 更新函数 flushSchedulerQueue) 数组95 const copies = callbacks.slice(0);96 callbacks.length = 0;97 for (let i = 0; i < copies.length; i++) {98 console.log(i,'flushCallbacks 的 i')99 copies[i]();100 }101}102let has = {}; /​/​ 标识这个 watch 有没有被 queue push 进去103let queue = []; /​/​ 存放 watch 的数组104let waiting = false;105function queueWatcher(watcher) {106 const id = watcher.id;107 if (has[id] == null) {108 has[id] = true;109 queue.push(watcher);110 if (!waiting) {111 waiting = true;112 /​/​ nextTick是Vue实现的微任务机制(在不支持微任务的情况下,回退到宏任务),flushSchedulerQueue 则是用来执行queue中的观察者,并清空queue113 nextTick(flushSchedulerQueue); 114 }115 }116}117function flushSchedulerQueue () {118 let watcher, id;119 for (index = 0; index < queue.length; index++) {120 console.log(index,'flushSchedulerQueue 的 index')121 watcher = queue[index]122 id = watcher.id;123 has[id] = null;124 watcher.run();125 }126 waiting = false;127}128/​**129 * https:/​/​juejin.im/​post/​5c204ce36fb9a049d975363d130 * 131 * vue 解析...

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schedular.js

Source: schedular.js Github

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...9import { nextTick } from "../​utils"10let queue = []11let has = {} /​/​ 做列表维护 存放了哪些watcher12let pedding = false13function flushSchedulerQueue() {14 queue.forEach(item => {15 item.run()16 })17 queue = []18 has = {}19 pedding = false20}21/​/​ 同一个watcher22/​/​ 多次dep修改只会执行更新一次23export function queueWacther(watcher) { /​/​ 当前执行栈中代码执行完毕后,会先清空微任务,再清空宏任务,我希望更早的渲染24 const id = watcher.id25 /​/​ console.log(watcher, 'watcher')26 if(!has[id]) {27 queue.push(watcher)...

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scheduler.js

Source: scheduler.js Github

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1import { nextTick } from "../​utils"2let queue = []3let has = {} /​/​ 做 watcher 维护4let pedding = false5function flushSchedulerQueue() {6 for (let i = 0; i < queue.length; i++) {7 queue[i].run()8 }9 queue = []10 has = {}11 pedding = false12}13export function queueWatcher(watcher) {14 const {15 id16 } = watcher17 if (!has[id]) {18 has[id] = true19 queue.push(watcher)...

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schduler.js

Source: schduler.js Github

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...9 queue.push(watcher)10 has[id] = true11 /​/​ 开启异步,会等待所有同步后再执行12 /​/​ setTimeout(() => {13 /​/​ flushSchedulerQueue()14 /​/​ }, 0)15 if (!pending) {16 nextTick(flushSchedulerQueue)17 pending = true18 }19 }20}21export function flushSchedulerQueue () {22 queue.forEach(watcher =>{23 watcher.run()24 if (!watcher.user) {25 watcher.cb()26 }27 });...

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Using AI Code Generation

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1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch({ headless: false });4 const page = await browser.newPage();5 await page.click('text=Get started');6 await page.click('text=Docs');7 await page.click('text=API');8 await page.click('text=Browser

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Using AI Code Generation

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1const { flushSchedulerQueue } = require('playwright/​lib/​server/​browserContext');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 await flushSchedulerQueue();8 await browser.close();9})();10I have tried to use flushSchedulerQueue() after browser.close() and page.close() and context.close

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Using AI Code Generation

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1const playwright = require('playwright');2(async () => {3const browser = await playwright.chromium.launch({headless:false});4const context = await browser.newContext();5const page = await context.newPage();6await page.type('input[name="q"]', 'Hello World');7await page.keyboard.press('Enter');8await page.waitForNavigation();9await browser.close();10})();11const playwright = require('playwright');12(async () => {13const browser = await playwright.chromium.launch({headless:true});14const context = await browser.newContext();15const page = await context.newPage();16await page.type('input[name="q"]', 'Hello World');17await page.keyboard.press('Enter');18await page.waitForNavigation();19await browser.close();20})();

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Using AI Code Generation

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1const { flushSchedulerQueue } = require('playwright/​lib/​utils/​progress');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 await flushSchedulerQueue();8 await page.screenshot({ path: 'google.png' });9 await browser.close();10})();11const { chromium } = require('playwright');12(async () => {13 const browser = await chromium.launch();14 const context = await browser.newContext();15 const page = await context.newPage();16 await page.waitForLoadState('load');17 await page.screenshot({ path: 'google.png' });18 await browser.close();19})();

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Using AI Code Generation

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1const { flushSchedulerQueue } = require('playwright/​lib/​server/​scheduler');2await flushSchedulerQueue();3const { flushSchedulerQueue } = require('playwright/​lib/​server/​scheduler');4await flushSchedulerQueue();5const { flushSchedulerQueue } = require('playwright/​lib/​server/​scheduler');6await flushSchedulerQueue();7const { flushSchedulerQueue } = require('playwright/​lib/​server/​scheduler');8await flushSchedulerQueue();9const { flushSchedulerQueue } = require('playwright/​lib/​server/​scheduler');10await flushSchedulerQueue();11const { flushSchedulerQueue } = require('playwright/​lib/​server/​scheduler');12await flushSchedulerQueue();13const { flushSchedulerQueue } = require('playwright/​lib/​server/​scheduler');14await flushSchedulerQueue();15const { flushSchedulerQueue } = require('playwright/​lib/​server/​scheduler');16await flushSchedulerQueue();17const { flushSchedulerQueue } = require('playwright/​lib/​server/​scheduler');18await flushSchedulerQueue();19const { flushSchedulerQueue } = require('playwright/​lib/​server/​scheduler');20await flushSchedulerQueue();21const { flushSchedulerQueue } = require('playwright/​lib/​server/​scheduler');22await flushSchedulerQueue();23const { flushSchedulerQueue } = require('playwright/​lib/​server/​scheduler');24await flushSchedulerQueue();25const { flushSchedulerQueue } = require('playwright/​lib/​server/​scheduler');26await flushSchedulerQueue();27const { flushSchedulerQueue } = require('playwright/​lib/​server/​scheduler');28await flushSchedulerQueue();29const { flushSchedulerQueue } =

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Using AI Code Generation

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1const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');2flushSchedulerQueue();3const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');4flushSchedulerQueue();5const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');6flushSchedulerQueue();7const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');8flushSchedulerQueue();9const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');10flushSchedulerQueue();11const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');12flushSchedulerQueue();13const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');14flushSchedulerQueue();15const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');16flushSchedulerQueue();17const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');18flushSchedulerQueue();19const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');20flushSchedulerQueue();21const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');22flushSchedulerQueue();23const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');24flushSchedulerQueue();

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Using AI Code Generation

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1const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement');2flushSchedulerQueue();3module.exports = { flushSchedulerQueue };4const { flushSchedulerQueue } = require('./​test');5flushSchedulerQueue();6module.exports = { flushSchedulerQueue };7const { flushSchedulerQueue } = require('./​test');8flushSchedulerQueue();9module.exports = { flushSchedulerQueue };10const { flushSchedulerQueue } = require('./​test');11flushSchedulerQueue();12module.exports = { flushSchedulerQueue };13const { flushSchedulerQueue } = require('./​test');14flushSchedulerQueue();

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Using AI Code Generation

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1const { flushSchedulerQueue } = require('playwright/​lib/​server/​frames');2(async () => {3 await flushSchedulerQueue();4})();5const { flushSchedulerQueue } = require('playwright/​lib/​server/​frames');6(async () => {7 await flushSchedulerQueue();8})();9const { flushSchedulerQueue } = require('playwright/​lib/​server/​frames');10(async () => {11 await flushSchedulerQueue();12})();13const { flushSchedulerQueue } = require('playwright/​lib/​server/​frames');14(async () => {15 await flushSchedulerQueue();16})();17const { flushSchedulerQueue } = require('playwright/​lib/​server/​frames');18(async () => {19 await flushSchedulerQueue();20})();21const { flushSchedulerQueue } = require('playwright/​lib/​server/​frames');22(async () => {23 await flushSchedulerQueue();24})();25const { flushSchedulerQueue } = require('playwright/​lib/​server/​frames');26(async () => {27 await flushSchedulerQueue();28})();29const { flushSchedulerQueue } = require('playwright/​lib/​server/​frames');30(async () => {31 await flushSchedulerQueue();32})();33const { flushSchedulerQueue } = require('playwright/​lib/​server/​frames');34(async () => {35 await flushSchedulerQueue();36})();37const { flushSchedulerQueue } = require('playwright/​lib/​server/​frames');38(async () => {39 await flushSchedulerQueue();40})();41const { flushSchedulerQueue } = require('playwright/​lib/​server/​frames');42(async () => {43 await flushSchedulerQueue();44})();

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Using AI Code Generation

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1const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');2flushSchedulerQueue();3const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');4flushSchedulerQueue();5const { flushSchedulerQueue } = require('playwright/​lib/​server/​supplements/​recorder/​recorderSupplement.js');6flushSchedulerQueue();

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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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