How to use watchEffect method in Playwright Internal

Best JavaScript code snippet using playwright-internal

script.js

Source:script.js Github

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1const vueApp = Vue.createApp({2 data() {3 return {4 subPages: [5 {6 name: 'ComponentsInDepth',7 text: '深入組件',8 list: [9 { href: '/​example/​component', text: '組件' },10 { href: '/​example/​slot', text: '插槽' },11 { href: '/​example/​async-component', text: '異步組件 (基本)' },12 { href: '/​example/​async-component/​await', text: '異步組件 (等待)' },13 { href: '/​example/​component-communication', text: '組件間通信' }14 ]15 },16 {17 name: 'Advanced_VueAndWebComponents',18 text: '高階指南 - Vue 與 Web 組件',19 list: [20 { href: '/​example/​custom-element', text: '在 Vue 中使用自訂元素（不跳過組件解析）' },21 { href: '/​example/​custom-element-with-options', text: '在 Vue 中使用自訂元素（跳過組件解析）' },22 { href: '/​example/​custom-element-with-options-and-properties', text: '在 Vue 中使用自訂元素（傳遞 DOM 屬性）' },23 { href: '/​example/​custom-element-built-with-vue', text: '使用 Vue 建構自訂元素' }24 ]25 },26 {27 name: 'Advanced_Reactivity',28 text: '高階指南 - 響應性 - 響應性基礎',29 list: [30 { href: '/​example/​reactivity/​ref', text: '獨立的響應式值 - ref' },31 { href: '/​example/​reactivity/​access-in-ref', text: '存取響應式物件' },32 { href: '/​example/​reactivity/​destructuring-reactive-state', text: '響應式狀態解構' },33 { href: '/​example/​reactivity/​prevent-mutating-reactive-objects', text: '防止更改響應式物件' }34 ]35 },36 {37 name: 'Advanced_ComputedAndWatch',38 text: '高階指南 - 響應性 - 響應式計算和監聽',39 list: [40 { href: '/​example/​computed', text: '計算值' },41 { href: '/​example/​watchEffect', text: 'watchEffect' },42 { href: '/​example/​watchEffect/​effect-flush-timing', text: 'watchEffect - effect 的刷新時機' },43 { href: '/​example/​watch/​single', text: 'watch - 監聽單個資料來源' },44 { href: '/​example/​watch/​multiple', text: 'watch - 監聽多個資料來源' }45 ]46 }47 ]48 };49 }50});51vueApp.component('sub-page-group', {52 props: [ 'group' ],53 template:54 '<h3>{{ group.text }}</​h3>' +55 '<ul>' +56 '<sub-page-list v-for="subPage in group.list"' +57 ' v-bind:href="subPage.href"' +58 ' v-bind:text="subPage.text"' +59 '></​sub-page-list>' +60 '</​ul>'61});62vueApp.component('sub-page-list', {63 props: [ 'href', 'text' ],64 template: '<li><a v-bind:href="href" target="_blank">{{ text }}</​a>'65});...

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dev2.js

Source:dev2.js Github

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...36 effect();37 });38 }39}40function watchEffect(effect) {41 /​/​ 先把传进来的函数放入到 activeEffect 这个变量中42 activeEffect = effect;43 /​/​ 然后执行 watchEffect 里面的函数44 effect();45 /​/​ 最后把 activeEffect 置为空值46 activeEffect = null;47}48const targetToHashMap = new WeakMap();49function getDep(target, key) {50 let depMap = targetToHashMap.get(target);51 if (!depMap) {52 depMap = new Map();53 targetToHashMap.set(target, depMap);54 }55 let dep = depMap.get(key);56 if (!dep) {57 dep = new Dep(target[key]);58 depMap.set(key, dep);59 }60 return dep;61}62function reactive(obj) {63 return new Proxy(obj, {64 get(target, key) {65 const value = getDep(target, key).value;66 if (value && typeof value === "object") {67 return reactive(value);68 } else {69 return value;70 }71 },72 set(target, key, value) {73 getDep(target, key).value = value;74 }75 });76}77const state = reactive({78 count: 079});80watchEffect(() => {81 console.log(state.count);82}); /​/​ 0...

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reactive.js

Source:reactive.js Github

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...13 })14 }15}16let activeEffect = null;17function watchEffect(effect) {18 activeEffect = effect;19 effect();20 activeEffect = null;21}22/​/​ Map({key: value}): key是一个字符串23/​/​ WeakMap({key(对象): value}): key是一个对象, 弱引用24const targetMap = new WeakMap();25function getDep(target, key) {26 /​/​ 1.根据对象(target)取出对应的Map对象27 let depsMap = targetMap.get(target);28 if (!depsMap) {29 depsMap = new Map();30 targetMap.set(target, depsMap);31 }32 /​/​ 2.取出具体的dep对象33 let dep = depsMap.get(key);34 if (!dep) {35 dep = new Dep();36 depsMap.set(key, dep);37 }38 return dep;39}40/​/​ vue3对raw进行数据劫持41function reactive(raw) {42 return new Proxy(raw, {43 get(target, key) {44 const dep = getDep(target, key);45 dep.depend();46 return target[key];47 },48 set(target, key, newValue) {49 const dep = getDep(target, key);50 target[key] = newValue;51 dep.notify();52 }53 })54}55/​/​ const proxy = reactive({name: "123"})56/​/​ proxy.name = "321";57/​/​ /​/​ 测试代码58/​/​ const info = reactive({counter: 100, name: "why"});59/​/​ const foo = reactive({height: 1.88});60/​/​ /​/​ watchEffect161/​/​ watchEffect(function () {62/​/​ console.log("effect1:", info.counter * 2, info.name);63/​/​ })64/​/​ /​/​ watchEffect265/​/​ watchEffect(function () {66/​/​ console.log("effect2:", info.counter * info.counter);67/​/​ })68/​/​ /​/​ watchEffect369/​/​ watchEffect(function () {70/​/​ console.log("effect3:", info.counter + 10, info.name);71/​/​ })72/​/​ watchEffect(function () {73/​/​ console.log("effect4:", foo.height);74/​/​ })75/​/​ info.counter++;76/​/​ info.name = "why";...

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reactive_vue3实现.js

Source:reactive_vue3实现.js Github

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...13 })14 }15}16let activeEffect = null;17function watchEffect(effect) {18 activeEffect = effect;19 effect();20 activeEffect = null;21}22/​/​ Map({key: value}): key是一个字符串23/​/​ WeakMap({key(对象): value}): key是一个对象, 弱引用24const targetMap = new WeakMap();25function getDep(target, key) {26 /​/​ 1.根据对象(target)取出对应的Map对象27 let depsMap = targetMap.get(target);28 if (!depsMap) {29 depsMap = new Map();30 targetMap.set(target, depsMap);31 }32 /​/​ 2.取出具体的dep对象33 let dep = depsMap.get(key);34 if (!dep) {35 dep = new Dep();36 depsMap.set(key, dep);37 }38 return dep;39}40/​/​ vue3对raw进行数据劫持41function reactive(raw) {42 return new Proxy(raw, {43 get(target, key) {44 const dep = getDep(target, key);45 dep.depend();46 return target[key];47 },48 set(target, key, newValue) {49 const dep = getDep(target, key);50 target[key] = newValue;51 console.log('target', target)52 dep.notify();53 }54 })55}56/​/​ const proxy = reactive({name: "123"})57/​/​ proxy.name = "321";58/​/​ 测试代码59const info = reactive({counter: 100, name: "why"});60const foo = reactive({height: 1.88});61/​/​ watchEffect162watchEffect(function () {63 console.log("effect1:", info.counter * 2, info.name);64})65/​/​ watchEffect266watchEffect(function () {67 console.log("effect2:", info.counter * info.counter);68})69/​/​ watchEffect370watchEffect(function () {71 console.log("effect3:", info.counter + 10, info.name);72})73watchEffect(function () {74 console.log("effect4:", foo.height);75})76info.counter++;77info.name = "whyttt";...

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03_reactive_vue2实现.js

Source:03_reactive_vue2实现.js Github

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...13 })14 }15}16let activeEffect = null;17function watchEffect(effect) {18 activeEffect = effect;19 effect();20 activeEffect = null;21}22/​/​ Map({key: value}): key是一个字符串23/​/​ WeakMap({key(对象): value}): key是一个对象, 弱引用24const targetMap = new WeakMap();25function getDep(target, key) {26 /​/​ 1.根据对象(target)取出对应的Map对象27 let depsMap = targetMap.get(target);28 if (!depsMap) {29 depsMap = new Map();30 targetMap.set(target, depsMap);31 }32 /​/​ 2.取出具体的dep对象33 let dep = depsMap.get(key);34 if (!dep) {35 dep = new Dep();36 depsMap.set(key, dep);37 }38 return dep;39}40/​/​ vue2对raw进行数据劫持41function reactive(raw) {42 Object.keys(raw).forEach(key => {43 const dep = getDep(raw, key);44 let value = raw[key];45 Object.defineProperty(raw, key, {46 get() {47 dep.depend();48 return value;49 },50 set(newValue) {51 if (value !== newValue) {52 value = newValue;53 dep.notify();54 }55 }56 })57 })58 return raw;59}60/​/​ 测试代码61const info = reactive({counter: 100, name: "why"});62const foo = reactive({height: 1.88});63/​/​ watchEffect164watchEffect(function () {65 console.log("effect1:", info.counter * 2, info.name);66})67/​/​ watchEffect268watchEffect(function () {69 console.log("effect2:", info.counter * info.counter);70})71/​/​ watchEffect372watchEffect(function () {73 console.log("effect3:", info.counter + 10, info.name);74})75watchEffect(function () {76 console.log("effect4:", foo.height);77})78/​/​ info.counter++;79info.name = "why";...

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main5.js

Source:main5.js Github

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2/​/​每次准备取出第一个宏任务执行前, 都要将所有的微任务一个一个取出来执行，也就是优先级比宏任务高，且与微任务所处的代码位置无关3const state = reactive({4 count:05})6watchEffect(() => {7 console.log("wtchEffect", state.count)8})9watch(10 () => state.count,11 (count, oldCount) => {12 console.log("watch", count, oldCount)13 }14)15console.log("start")16setTimeout(() => {17 console.log("time out")18 state.count++19 state.count++20})...

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watchEffect.js

Source:watchEffect.js Github

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2 const { ref, computed, watch, watchEffect, } = Vue;3 const suite = new Benchmark.Suite();4 bench(() => {5 return suite.add("create watchEffect", () => {6 const we = watchEffect(() => {7 });8 });9 });10 bench(() => {11 let c = 0;12 const v = ref(100);13 const w = watchEffect(v, (v) => {14 const v2 = v.value;15 });16 let i = 0;17 return suite.add("update ref to trigger watchEffect (scheduled but not executed)", () => {18 v.value = i++;19 });20 })21 bench(() => {22 let c = 0;23 const v = ref(100);24 const w = watchEffect(v, (v) => {25 const v2 = v.value;26 });27 let i = 0;28 return suite.add("update ref to trigger watchEffect (executed)", function(deferred) {29 v.value = i++;30 Vue.nextTick(() => deferred.resolve());31 }, { defer: true });32 })33 return suite;...

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useCamera.js

Source:useCamera.js Github

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...5 lookAt: { x:0, y:0, z:0 },6 position: { x:10, y:10, z:10 }7})8const camera = new THREE.PerspectiveCamera()9watchEffect(() => {10 camera.fov = state.fov11})12watchEffect(() => {13 camera.position.x = state.position.x14 camera.position.y = state.position.y15 camera.position.z = state.position.z16})17watchEffect(() => {18 camera.lookAt(state.lookAt.x, state.lookAt.y, state.lookAt.z)19})20export default {21 camera,22 ...toRefs(state)...

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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 context = await browser.newContext();5 const page = await context.newPage();6 await page.click('input[name="q"]');7 await page.fill('input[name="q"]', 'playwright');8 await page.press('input[name="q"]', 'Enter');9 await page.close();10 await context.close();11 await browser.close();12})();

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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.fill("input[type=text]", "Playwright");6 await page.keyboard.press("Enter");7 await page.waitForNavigation();8 await page.screenshot({ path: "google-playwright.png" });9 await browser.close();10})();11const { chromium } = require("playwright");12(async () => {13 const browser = await chromium.launch({ headless: false });14 const page = await browser.newPage();15 page.on("dialog", (dialog) => {16 console.log(dialog.message());17 dialog.accept();18 });19 await page.click("button[onclick='jsAlert()']");20 await browser.close();21})();

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Using AI Code Generation

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1const { test } = require('@playwright/​test');2test('example test', async ({ page }) => {3 await page.click('text=Get started');4 await page.click('text=Docs');5 await page.click('text=API');6 await page.click('text=Selectors');7 await page.click('te

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Using AI Code Generation

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1const { test, expect } = require('@playwright/​test');2test('test', async ({ page }) => {3 await page.click('text=Docs');4 await page.click('text=API');5 await page.click('text=Page');6 await page.click('text=page.$eval');7 await page.click('text=Parameters');8 await page.click('text=page.$eval');9 await page.click('text=Parameters');10 await page.click('text=page.$eval');11 await page.click('text=Parameters');12 await page.click('text=page.$eval');13 await page.click('text=Parameters');14 await page.click('text=page.$eval');15 await page.click('text=Parameters');16 await page.click('text=page.$eval');17 await page.click('text=Parameters');18 await page.click('text=page.$eval');19 await page.click('text=Parameters');20 await page.click('text=page.$eval');21 await page.click('text=Parameters');22 await page.click('text=page.$eval');23 await page.click('text=Parameters');24 await page.click('text=page.$eval');25 await page.click('text=Parameters');26});

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Using AI Code Generation

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1const { test, expect } = require('@playwright/​test');2test('example test', async ({ page }) => {3 await page.click('text=Get started');4 await page.waitForLoadState('networkidle');5 await page.click('text=Docs');6 await page.waitForLoadState('networkidle');7 await page.click('text=API');8 await page.waitForLoadState('networkidle');9 await page.click('text=Page');10 await page.waitForLoadState('networkidle');11 await page.click('text=page.waitForLoadState');12 await page.waitForLoadState('networkidle');13 await page.click('text=Example');

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Using AI Code Generation

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1const { test, expect } = require('@playwright/​test');2const { watchEffect, waitForFunction } = require('@playwright/​test/​lib/​internal/​inspectorHelper');3test('Test 1', async ({ page }) => {4 await watchEffect(async () => {5 await page.click('text=Get Started');6 });7 await expect(page.locator('text=Language bindings')).toBeVisible();8});9const { test, expect } = require('@playwright/​test');10const { watchEffect, waitForFunction } = require('@playwright/​test/​lib/​internal/​inspectorHelper');11test('Test 1', async ({ page }) => {12 await watchEffect(async () => {13 await page.click('text=Get Started');14 });15 await expect(page.locator('text=Language bindings')).toBeVisible();16});17const { test, expect } = require('@playwright/​test');18const { watchEffect, waitForFunction } = require('@playwright/​test/​lib/​internal/​inspectorHelper');19test('Test 1', async ({ page }) => {20 await watchEffect(async () => {21 await page.click('text=Get Started');22 });23 await expect(page.locator('text=Language bindings')).toBeVisible();24});

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Using AI Code Generation

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1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch({4 headless: process.argv.includes('--headless'),5 slowMo: process.argv.includes('--slowMo') ? 100 : 0,6 devtools: process.argv.includes('--devtools'),7 });8 const context = await browser.newContext();9 const page = await context.newPage();10 page.on('request', (request) => {11 console.log('>>>', request.method(), request.url());12 });13 page.on('response', (response) => {14 console.log('<<<', response.status(), response.url());15 });16 page.on('console', (msg) => {17 console.log('>>>', msg.text());18 });19 await page.click('text=Get started');20 await page.click('text=Docs');21 await page.click('text=API');22 await page.click('text=Page');23 await page.click('text=page.on');24 await page.click('text=page.route');25 await page.click('text=page.evaluate');26 await page.click('text=page.fill');27 await page.click('text=page.waitForSelector');28 await page.click('text=page.waitForTimeout');29 await page.click('text=page.waitForRequest');30 await page.click('text=page.waitForResponse');31 await page.click('text=page.waitForFunction');32 await page.click('text=page.close');33 await page.click('text=page.setContent');34 await page.click('text=page.waitForLoadState');35 await page.click('text=page.waitForNavigation');36 await page.click('text=page.waitForEvent');37 await page.click('text=page.click');38 await page.click('text=page.dblclick');39 await page.click('text=page.tap');40 await page.click('text=page.hover');41 await page.click('text=page.selectOption');42 await page.click('text=page.setInputFiles');43 await page.click('text=page.type');44 await page.click('text=page.press');45 await page.click('text=page.$');46 await page.click('text=page.$$

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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:

  1. 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.
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  4. 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.
  5. Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
  6. 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.
  7. 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.
  8. 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.
  9. 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.
  10. 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.
  11. 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.
  12. Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.

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