How to use basicStateReducer method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberHooks.js

Source:ReactFiberHooks.js Github

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...10const HookDispatcherOnUpdate = {//更新时的方法11 useReducer: updateReducer,12 useState:updateState13}14function basicStateReducer(state,action){15 return typeof action === 'function'?action(state):action;16}17function updateState(initialState){18 return updateReducer(basicStateReducer,initialState);19}20function mountState(initialState){21 let hook = mountWorkInProgressHook();//获取当前的hook22 hook.memoizedState = initialState;//023 const queue = (hook.queue = {pending:null,24 lastRenderedReducer:basicStateReducer,25 lastRenderedState:initialState26 });27 const dispatch = dispatchAction.bind(null,currentlyRenderingFiber,queue);28 return [hook.memoizedState,dispatch];...

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useState和useReducer.js

Source:useState和useReducer.js Github

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1function App() {2 const [state, dispatch] = useReducer(reducer, {a: 1});3 const [num, updateNum] = useState(0);4 return (5 <div>6 <button onClick={() => dispatch({type: 'a'})}>{state.a}</button>7 <button onClick={() => updateNum(num => num + 1)}>{num}</button>8 </div>9 )10}11// 两个阶段：声明阶段，调用阶段12// 声明阶段13/**14 * FC进入到render阶段的beginWork时，会调用renderWithHooks方法15 * 该方法内部会执行FC对应的函数，即fiber.type16 */17// resolveDispatcher函数主要是用来判断mount状态来返回不同的处理函数（dispatcher）的18function useState(initalState){19 var dispatcher = resolveDispatcher();20 /**21 * 参见hook.js中的useState实现22 * 主要工作是生成hook，将hook绑定到fiber.memoizedState链上，返回状态及dispatchAction函数23 */24 return dispatcher.useState(initalState);25}26function useReducer(reducer, initialArg, init){27 var dispatcher = resolveDispatcher();28 return dispatcher.useReducer(reducer, initialArg, init)29}30// mount时31// dispatcher.useState中会调用到mountState32function mountState<S>(33 initialState: (() => S) | S,34): [S, Dispatch<BasicStateAction<S>>] {35 // 创建并返回当前的hook36 const hook = mountWorkInProgressHook();37 // ...赋值初始state38 // 创建queue39 const queue = (hook.queue = {40 pending: null,41 // 保存dispatchAction.bind()的值42 dispatch: null,43 lastRenderedReducer: basicStateReducer,44 lastRenderedState: (initialState: any),45 });46 // ...创建dispatch47 return [hook.memorizedState, dispatch];48}49function mountReducer<S, I, A>(50 reducer: (S, A) => S,51 initialArg: I,52 init?: I => S,53): [S, Dispatch<A>] {54 // 创建并返回当前的hook55 const hook = mountWorkInProgressHook();56 // ...赋值初始state57 // 创建queue58 const queue = (hook.queue = {59 pending: null,60 dispatch: null,61 // 上次render时使用的reducer62 lastRenderedReducer: reducer,63 // 上次render时的state64 lastRenderedState: (initialState: any),65 });66 // ...创建dispatch67 return [hook.memoizedState, dispatch]68}69// 对应redux中的reducer —— 一个计算state的纯函数70function basicStateReducer<S>(state: S, action: BasicStateAction<S>) : S {71 return typeof action === 'function' ? action(state) : action72}73// update时，useReducer和useState调用同一个函数74function updateReducer<S, I, A>(75 reducer: (S, A) => S,76 initalArg: I,77 init?: I => S,78): [S, Dispatch<A>] {79 // 获取当前hook80 const hook = updateWorkInProgressHook();81 const queue = hook.queue;82 queue.lastRenderedReducer = reducer;83 // ...同update与updateQueue类似的更新逻辑, 即取出hook.queue.pending中的所有action执行一遍84 const dispatch: Dispatch<A> = (queue.dispatch: any);85 return [hook.memoizedState, dispatch];86}87// 调用阶段88// 即上个阶段生成的dispatch，前两个参数在生成的时候就已经预先传入了89function dispatchAction(fiber, queue, action) {90 // ...创建update91 var update = {92 eventTime: eventTime,93 lane: lane,94 suspenseConfig: suspenseConfig,95 action: action,96 eagerReducer: null,97 eagerState: null,98 next: null99 }100 // ...将update加入queue.pending101 var alternate = fiber.alternate;102 // currentlyRenderingFiber$1即workInProgress, workInProgress存在代表当前处于render阶段103 if(fiber === currentlyRenderingFiber$1 || alternate !== null && alternate === currentlyRenderingFiber$1) {104 // render阶段触发的更新105 didScheduleRenderPhaseUpdateDuringThisPass = didScheduleRenderPhaseUpdate = true;106 } else {107 if(fiber.lanes === NoLanes && (alternate === null || alternate.lanes === Nolanes)) {108 // ...fiber的updateQueue为空，优化路径 //TODO109 }110 scheduleUpdateOnFiber(fiber, lane, eventTime);111 }...

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useState&usereducer.js

Source:useState&usereducer.js Github

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1//########1.声明阶段2/***********mount时************/ 3//useState的执行方法4function mountState<S>(5 initialState: (()=>S) | S,6) : [S, Dispatch<BasicStateAction<S>>]{7 //创建并返回当前的hook8 const hook = mountWorkInProgressHook()9 //...复制初始化state10 //创建queue11 const queue = (hook.queue = {12 pending: null,13 dispatch: null,14 //这里的basicStateReducer为useReducer的一个方法,下文可见15 lastRenderedReducer: basicStateReducer,16 lastRenderedState: (initialState: any),17 })18 //...创建dispatch19 return [hook.memoizedState, dispatch]20}21function mountreducer<S, I, A>(22 reducer:(S, A) => S,23 initialArg: I,24 init?: I=>S,25):[S,Dispatch<A>]{26 //创建并返回当前的hook27 const hook = mountWorkInProgressHook()28 //...复制初始state29 //创建queue30 const queu = (hook.queue = {31 //保存update对象32 pending: null,33 //保存dispatchAction.bind()的值34 dispatch: null,35 //上一次render时使用的reducer36 lastRenderedReducer: reducer,37 //上一次render时的state38 lastRenderedState: (initialState: any)39 })40 //...创建dispatch41 return [hook.memoizedState, dispatch];42}43function basicStateReducer<S>(state:S, action:BasicStateAction<S>):S{44 //这里对应这 useState的函数式更新和普通的赋值更新45 return typeof action === 'function' ? action(state) : action46}47/***********update时************/ 48//更新时,两者调用的是同一个函数updateReducer49function updateReducer<S, I, A>(50 reducer:(S, A) => S,51 initialAtg:I,52 init?: I => S,53):[S, Dispatch<A>]{54 //获取当前的hooks55 const hook = updateWorkInProgressHook()56 const queue = hook.queue57 queue.lastRenderedReducer = reducer58 //..同update与updateQueue类似的更新逻辑59 const dispatch: Dispatch<A> = (queue.dispatch: any);60 return [hook.memoizedState, dispatch]61}62//########2.调用阶段63function dispatchAction(fiber, queue, action){64 //...创建update65 const update = {66 eventTime: eventTime,67 lane:lane,68 suspenseConfig:suspenseConfig,69 action:action,70 eagerReducer:null,71 eagerState:null,72 next:null,73 }74 //...将update加入到queue.pending75 let alternate = fiber.alternate76 if(77 //currentlyRenderingFiber即workInProgress 78 //workInProgress存在代表当前处于render阶段。79 fiber === currentlyRenderingFiber$1 ||80 alternate !== null &&81 alternate === currentlyRenderingFiber$182 ){83 //render阶段触发的更新 做一个标记84 didScheduleRenderPhaseUpdateDuringThisPass = 85 disScheduleRenderPhaseUpdate = true86 } else {87 //判断优先级88 if(89 fiber.lanes === NoLanes &&90 (alternate === null || alternate.lanes === NoLanes)91 ){92 ///...fiber的updateQueue为空,优化路径93 }94 scheduleUpdateOnFiber(fiber, lane, eventTime);95 }96}97//总的流程概括就是,创建update,将其加入到queu.pending中,并开启调度98//传入给useReducer的reducer函数其实是可变的99import { StrictMode, useReducer } from "react";100import ReactDOM from "react-dom";101const currentReducerRef = {102 current: null103};104const addReducer = (state) => state + 1;105const subReducer = (state) => state - 1;106let i = 0;107setInterval(() => {108 currentReducerRef.current = i++ % 2 ? addReducer : subReducer;109}, 1000);110function App() {111 const [state, dispatch] = useReducer(currentReducerRef.current, 0);112 return <button onClick={dispatch}>数字是：{state}</button>;113}114const rootElement = document.getElementById("root");115ReactDOM.render(116 <StrictMode>117 <App />118 </StrictMode>,119 rootElement...

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hook.js

Source:hook.js Github

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...78 baseState: 100, 79 baseQueue: null, 80 queue: {81 dispatch: ƒ (),82 lastRenderedReducer: ƒ basicStateReducer(state, action),83 lastRenderedState: 100,84 pending: null,85 }86 },87 queue: {88 dispatch: ƒ (),89 lastRenderedReducer: ƒ basicStateReducer(state, action),90 lastRenderedState: 0,91 pending: null,92 }...

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ReactPartialRendererHooks.js

Source:ReactPartialRendererHooks.js Github

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1/**2 * Copyright (c) Facebook, Inc. and its affiliates.3 *4 * This source code is licensed under the MIT license found in the5 * LICENSE file in the root directory of this source tree.6 *7 * @flow8 */9import type {Dispatcher as DispatcherType} from 'react-reconciler/src/ReactInternalTypes';10import type PartialRenderer from './ReactPartialRenderer';11type BasicStateAction<S> = (S => S) | S;12type Dispatch<A> = A => void;13let currentlyRenderingComponent: Object | null = null;14let firstWorkInProgressHook: Hook | null = null;15let workInProgressHook: Hook | null = null;16// Whether the work-in-progress hook is a re-rendered hook17let isReRende: boolean = false;18// Whether an update was scheduled during the currently executing render pass.19let didScheduleRenderPhaseUpdate: boolean = false;20// Lazily created map of render-phase updates21let renderPhaseUpdates: Map<UpdateQueue<any>, Update<any>> | null = null;22// Conter to prevent infinite loops.23let numberOfReRenders: number = 0;24const RE_RENDER_LIMIT = 25;25let isInHookUserCodeInDev = false;26// In DEV, this is the name of the curretly executing primitive hook27let currentHookNameInDev: ?string;28export function prepareToUseHooks(componentIdentity: Object): void {29 currentlyRenderingComponent = componentIdentity;30 if (__DEV__) {31 isInHookUserCodeInDev = false;32 }33 // The following should have already been reset34 // didScheduleRenderPhaseUpdate = false;35 // firstWorkInProgressHook = null;36 // numberOfReRenders = 0;37 // renderPhaseUpdates = null;38 // workInProgressHook = null;39}40export function finishHooks(41 Component: any,42 props: any,43 children: any,44 refOrContext: any,45): any {46 // This must be called after every function component to prevent hooks from47 // being used in classes.48 while (didScheduleRenderPhaseUpdate) {49 // Updates were scheduled during the render phase. They are stored in50 // the `renderPhaseUpdates` map. Call the component again, reusing the51 // work-in-progress hooks and applying the additional updates on top. Keep52 // restarting until no more updates are scheduled.53 didScheduleRenderPhaseUpdate = false;54 numberOfReRenders += 1;55 // Start over from the beginning of the list56 workInProgressHook = null;57 children = Component(props, refOrContext);58 }59 resetHooksState();60 return children;61}62// Reset the internal hooks state if an error occurs while rendering a component63export function resetHooksState(): void {64 if (__DEV__) {65 isInHookUserCodeInDev = false;66 }67 currentlyRenderingComponent = null;68 didScheduleRenderPhaseUpdate = false;69 firstWorkInProgressHook = null;70}71function basicStateReducer<S>(state: S, action: BasicStateAction<S>): S {72 // $FlowFixMe: Flow doesn't like mixed types73 return typeof action === 'function' ? action(state) : action;74}75export function useState<S>(76 initialState: (() => S) | S,77): [S, Dispatch<BasicStateAction<S>>] {78 if (__DEV__) {79 currentHookNameInDev = 'useState'80 }81 return useReducer(82 basicStateReducer,83 )84}85export let currentPartialRenderer: PartialRenderer = (null: any);86export function setCurrentPartialRenderer(renderer: PartialRenderer) {87 currentPartialRenderer = renderer;...

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ssr-dispatcher.js

Source:ssr-dispatcher.js Github

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...38 }39 }40 return workInProgressHook;41}42function basicStateReducer(state, action) {43 return typeof action === "function" ? action(state) : action;44}45function useReducer(reducer, initialState, initialAction) {46 resolveCurrentlyRenderingFiber();47 workInProgressHook = createWorkInProgressHook();48 if (isReRender) {49 throw new Error("TODO");50 } else {51 if (reducer === basicStateReducer) {52 // Special case for `useState`.53 if (typeof initialState === "function") {54 initialState = initialState();55 }56 } else if (initialAction !== undefined && initialAction !== null) {...

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Update.js

Source:Update.js Github

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1// ReactFiberHooks.js2// 所以调用useState(0)返回的就是HooksDispatcherOnUpdate.useState(0)，也就是updateReducer(basicStateReducer, 0)3const HooksDispatcherOnUpdate: Dispatcher = {4 /** 省略其它Hooks **/5 useState: updateState,6 }7 8 function updateState(initialState) {9 return updateReducer(basicStateReducer, initialState);10 }11 // * 可以看到updateReducer的过程与传的initalState已经无关了，所以初始值只在第一次被使用12 13 // ...14 function updateReducer(reducer, initialArg, init) {15 // * 获取初始化时的 hook16 const hook = updateWorkInProgressHook();17 const queue = hook.queue;18 19 // * 开始渲染更新20 if (numberOfReRenders > 0) {21 const dispatch = queue.dispatch;22 if (renderPhaseUpdates !== null) {23 // * 获取Hook对象上的 queue，内部存有本次更新的一系列数据24 const firstRenderPhaseUpdate = renderPhaseUpdates.get(queue);25 if (firstRenderPhaseUpdate !== undefined) {26 renderPhaseUpdates.delete(queue);27 let newState = hook.memoizedState;28 let update = firstRenderPhaseUpdate;29 // * 获取更新后的state30 do {31 const action = update.action;32 // 此时的reducer是basicStateReducer，直接返回action的值33 newState = reducer(newState, action);34 update = update.next;35 } while (update !== null);36 37 // 对 更新hook.memoized 38 hook.memoizedState = newState;39 // * 返回新的 state，及更新 hook 的 dispatch 方法40 return [newState, dispatch];41 }42 }43 }44 45 // 对于useState触发的update action来说（假设useState里面都传的变量），basicStateReducer就是直接返回action的值46 function basicStateReducer<S>(state: S, action: BasicStateAction<S>): S {47 return typeof action === 'function' ? action(state) : action;48 }...

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Mount.js

Source:Mount.js Github

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1// * 例子2const [state, setState] = useState(0);3// ReactFiberHooks.js4const HooksDispatcherOnMount: Dispatcher = {5 // ...6 useState: mountState,7 // ...8 };9// * >>>>>>> ReactCurrentDispatcher.current.useState(initialState)10 // * 调用useState(0)返回的就是 HooksDispatcherOnMount.useState(0)，即下面的 mountState(0) 方法11function mountState<S>(12 initialState: (() => S) | S,13 ): [S, Dispatch<BasicStateAction<S>>] {14 // 访问Hook链表的下一个节点，获取到新的Hook对象15 const hook = mountWorkInProgressHook();16 // 如果入参是function则会调用，但是不提供参数17 if (typeof initialState === 'function') {18 initialState = initialState();19 }20 // state的初始化21 hook.memoizedState = hook.baseState = initialState;22 // queue的初始化23 const queue = (hook.queue = {24 last: null,25 dispatch: null,26 eagerReducer: basicStateReducer, // useState使用基础reducer27 eagerState: (initialState: any),28 });29 // 返回触发器dispatch30 const dispatch: Dispatch<BasicStateAction<S>,> 31 = (queue.dispatch = (dispatchAction.bind(32 null,33 //绑定当前fiber结点和queue34 ((currentlyRenderingFiber: any): Fiber),35 queue,36 ));37 // 返回初始state和触发器38 return [hook.memoizedState, dispatch];39 }40 41 // 对于useState触发的update action来说（假设useState里面都传的变量），basicStateReducer就是直接返回action的值42 function basicStateReducer<S>(state: S, action: BasicStateAction<S>): S {43 return typeof action === 'function' ? action(state) : action;44 }...

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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.evaluate(() => {7 window.basicStateReducer = (state, action) => {8 if (action.type === 'Page.load') {9 state.url = action.url;10 }11 return state;12 };13 });14 await page.waitForTimeout(5000);15 await browser.close();16})();17const {chromium} = require('playwright');18(async() => {19 const browser = await chromium.launch({ headless: false });20 const context = await browser.newContext();21 const page = await context.newPage();22 await page.evaluate(() => {23 window.basicStateReducer = (state, action) => {24 if (action.type === 'Page.load') {25 state.url = action.url;26 }27 return state;28 };29 });30 await page.waitForTimeout(5000);31 await browser.close();32})();33const {chromium} = require('playwright');34(async() => {35 const browser = await chromium.launch({ headless: false });36 const context = await browser.newContext();37 const page = await context.newPage();38 await page.evaluate(() => {39 window.basicStateReducer = (state, action) => {40 if (action.type === 'Page.load') {41 state.url = action.url;42 }43 return state;44 };45 });46 await page.waitForTimeout(5000);47 await browser.close();48})();49const {chromium} = require('playwright');50(async() => {51 const browser = await chromium.launch({ headless: false });52 const context = await browser.newContext();

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Using AI Code Generation

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1const { chromium } = require('playwright');2const { basicStateReducer } = require('playwright-core/lib/state');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 await page.screenshot({ path: 'example.png' });8 await browser.close();9})();10const { chromium } = require('playwright-core');11const { basicStateReducer } = require('playwright-core/lib/state');12(async () => {13 const browser = await chromium.launch();14 const context = await browser.newContext();15 const page = await context.newPage();16 await page.screenshot({ path: 'example.png' });17 await browser.close();18})();19const { chromium } = require('playwright-core');20const { basicStateReducer } = require('playwright-core/lib/state');21(async () => {22 const browser = await chromium.launch();23 const context = await browser.newContext();24 const page = await context.newPage();25 await page.screenshot({ path: 'example.png' });26 await browser.close();27})();28const { chromium } = require('playwright-core');29const { basicStateReducer } = require('playwright-core/lib/state');30(async () => {31 const browser = await chromium.launch();32 const context = await browser.newContext();33 const page = await context.newPage();34 await page.screenshot({ path: 'example.png' });35 await browser.close();36})();37const { chromium } = require('playwright-core');38const { basicStateReducer } = require('playwright-core/lib/state');39(async () => {40 const browser = await chromium.launch();41 const context = await browser.newContext();42 const page = await context.newPage();

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Using AI Code Generation

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1const { basicStateReducer } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement');2const { basicStateReducer } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement');3const state = {4};5const action = {6};7basicStateReducer(state, action);8console.log(state);9{10 {11 }12}13const { codeGeneratorReducer } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement');14const state = {15};16const action = {17};18codeGeneratorReducer(state, action);19console.log(state);20{21 {22 code: 'await page.click(\'button\');'23 }24}25const { codeGeneratorReducer } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement');26const state = {27};28const action = {29};30codeGeneratorReducer(state, action);31console.log(state);32{33 {

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Using AI Code Generation

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1const { basicStateReducer } = require('playwright/lib/client/supplements/recorder/recorderSupplement');2const { Page } = require('playwright/lib/client/page');3const { Frame } = require('playwright/lib/client/frame');4const { basicStateReducer } = require('playwright/lib/client/supplements/recorder/recorderSupplement');5const { Page } = require('playwright/lib/client/page');6const { Frame } = require('playwright/lib/client/frame');7const { basicStateReducer } = require('playwright/lib/client/supplements/recorder/recorderSupplement');8const { Page } = require('playwright/lib/client/page');9const { Frame } = require('playwright/lib/client/frame');10const { basicStateReducer } = require('playwright/lib/client/supplements/recorder/recorderSupplement');11const { Page } = require('playwright/lib/client/page');12const { Frame } = require('playwright/lib/client/frame');13const { basicStateReducer } = require('playwright/lib/client/supplements/recorder/recorderSupplement');14const { Page } = require('playwright/lib/client/page');15const { Frame } = require('playwright/lib/client/frame');16const { basicStateReducer } = require('playwright/lib/client/supplements/recorder/recorderSupplement');17const { Page } = require('playwright/lib/client/page');18const { Frame } = require('playwright/lib/client/frame');19const { basicStateReducer } = require('playwright/lib/client/supplements/recorder/recorderSupplement');20const { Page } = require('playwright/lib/client/page');21const { Frame } = require('playwright/lib/client/frame');22const { basicStateReducer } = require('playwright/lib/client/supplements/recorder/recorderSupplement');23const { Page } = require('playwright/lib/client/page');24const { Frame } = require('playwright/lib/client/frame');25const {

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Using AI Code Generation

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1const { basicStateReducer } = require('playwright/lib/server/stateSnapshot');2const { state } = require('playwright/lib/server/state');3const stateSnapshot = basicStateReducer(state, { type: 'snapshot' });4console.log(stateSnapshot);5const { basicStateReducer } = require('playwright/lib/server/stateSnapshot');6const { state } = require('playwright/lib/server/state');7const stateSnapshot = basicStateReducer(state, { type: 'snapshot' });8console.log(stateSnapshot);9const { basicStateReducer } = require('playwright/lib/server/stateSnapshot');10const { state } = require('playwright/lib/server/state');11const stateSnapshot = basicStateReducer(state, { type: 'snapshot' });12console.log(stateSnapshot);13const { basicStateReducer } = require('playwright/lib/server/stateSnapshot');14const { state } = require('playwright/lib/server/state');15const stateSnapshot = basicStateReducer(state, { type: 'snapshot' });16console.log(stateSnapshot);17const { basicStateReducer } = require('playwright/lib/server/stateSnapshot');18const { state } = require('playwright/lib/server/state');19const stateSnapshot = basicStateReducer(state, { type: 'snapshot' });20console.log(stateSnapshot);21const { basicStateReducer } = require('playwright/lib/server/stateSnapshot');22const { state } = require('playwright/lib/server/state');23const stateSnapshot = basicStateReducer(state, { type: 'snapshot' });24console.log(stateSnapshot);25const { basicStateReducer } = require('playwright/lib/server/stateSnapshot');26const { state } = require('playwright/lib/server/state');27const stateSnapshot = basicStateReducer(state, { type: 'snapshot' });28console.log(stateSnapshot);29const { basicStateReducer } = require('playwright/lib/server/stateSnapshot');30const { state } = require('playwright/lib/server/state');31const stateSnapshot = basicStateReducer(state, { type: 'snapshot' });32console.log(stateSnapshot);33const { basicStateReducer } = require('playwright/lib/server/stateSnapshot');34const { state } = require('playwright/lib/server/state');35const stateSnapshot = basicStateReducer(state, { type: 'snapshot' });36console.log(stateSnapshot);37const { basicStateReducer } = require('playwright/lib/server/stateSnapshot');38const { state

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Using AI Code Generation

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1const { basicStateReducer } = require('playwright/lib/server/frames');2const state = basicStateReducer({}, { method: 'SetDocumentContent', params: { document: 'Hello World' } });3console.log(state);4const { basicStateReducer } = require('playwright/lib/server/frames');5const state = basicStateReducer({}, { method: 'SetDocumentContent', params: { document: 'Hello World' } });6console.log(state);7const { basicStateReducer } = require('playwright/lib/server/frames');8const state = basicStateReducer({}, { method: 'SetDocumentContent', params: { document: 'Hello World' } });9console.log(state);10const { basicStateReducer } = require('playwright/lib/server/frames');11const state = basicStateReducer({}, { method: 'SetDocumentContent', params: { document: 'Hello World' } });12console.log(state);13const { basicStateReducer } = require('playwright/lib/server/frames');14const state = basicStateReducer({}, { method: 'SetDocumentContent', params: { document: 'Hello World' } });15console.log(state);16const { basicStateReducer } = require('playwright/lib/server/frames');17const state = basicStateReducer({}, { method: 'SetDocumentContent', params: { document: 'Hello World' } });18console.log(state);19const { basicStateReducer } = require('playwright/lib/server/frames');20const state = basicStateReducer({}, { method: 'SetDocumentContent', params: { document: 'Hello World' } });21console.log(state);22const { basicStateReducer } = require('playwright/lib/server/frames');23const state = basicStateReducer({}, { method: 'SetDocumentContent', params: { document: 'Hello World' } });24console.log(state);25const { basicStateReducer } = require('playwright/lib/server/frames');

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1const playwright = require('playwright');2const { basicStateReducer } = require('playwright/lib/server/browserContext');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 basicStateReducer(page, {9 viewportSize: {10 }11 });12 await page.screenshot({ path: 'example.png' });13 await browser.close();14})();15const playwright = require('playwright');16const { basicStateReducer } = require('playwright/lib/server/browserContext');17const { chromium } = require('playwright');18(async () => {19 const browser = await chromium.launch();20 const context = await browser.newContext();21 await basicStateReducer(context, {22 viewportSize: {23 }24 });25 const page1 = await context.newPage();26 const page2 = await context.newPage();27 await page1.screenshot({ path: 'example1.png' });28 await page2.screenshot({ path: 'example2.png' });29 await browser.close();30})();

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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.
  2. 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.
  3. 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.
  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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