How to use performConcurrentWorkOnRoot method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberWorkLoop.js

Source:ReactFiberWorkLoop.js Github

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...190 }191 root.callbackNode = callbackNode;192}193// schedule阶段结束，进入concurrent模式的render阶段194function performConcurrentWorkOnRoot(root, didTimeout) {195 currentEventTime = NoWork;196 if (didTimeout) {197 // 由于currentEventTime已经被重置，且还未处于render或commit198 // 所以currentTime是一个新的时间199 const currentTime = requestCurrentTimeForUpdate();200 // 标记任务过期，这样ensureRootIsScheduled时会以同步任务的形式处理该任务201 markRootExpiredAtTime(root, currentTime);202 ensureRootIsScheduled(root);203 return null;204 }205 const expirationTime = getNextRootExpirationTimeToWorkOn(root);206 if (expirationTime === NoWork) {207 return null;208 }...

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Scheduler.js

Source:Scheduler.js Github

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...325 const callback = currentTask.callback;326 if (typeof callback === 'function') {327 currentTask.callback = null;328 // 可以把当前任务是否超时的信息，传递给回调，比如：react 的 performConcurrentWorkOnRoot 方法329 // 定义：function performConcurrentWorkOnRoot(root, didTimeout) { ... }330 // 使用：scheduleCallback(schedulerPriorityLevel, performConcurrentWorkOnRoot.bind(null, root));331 const didTimeout = currentTask.expirationTime <= currentTime;332 const continuationCallback = callback(didTimeout);333 // 由于我们回调形式是，如果没执行完，就返回它自身，所以这里表示该回调下次还要继续执行334 if (typeof continuationCallback === 'function') {335 currentTask.callback = continuationCallback;336 } else {337 // 当前任务已经执行完了，从队列中弹出338 if (currentTask === peek(taskQueue)) {339 pop(taskQueue);340 }341 }342 advanceTimers(currentTime);343 } else {...

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FiberWorkLoop.js

Source:FiberWorkLoop.js Github

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...132 root.callbackNode = newCallbackNode;133}134// Entry point for every concurrent task, i.e. anything that135// goes through Scheduler.136function performConcurrentWorkOnRoot(root){137 currentEventTime = NoTimestamp;138 const originalCallbackNode = root.callbackNode;139 let lanes = getNextLanes(140 root,141 root === wipRoot ? wipRootRenderLanes : NoLanes,142 )143 let exitStatus = renderRootConcurrent(root, lanes); 144 if(exitStatus !== RootIncomplete){145 if(exitStatus === RootErrored){146 executionContext |= RootErrored;147 return null;148 }149 // now we have a consistent tree and ready to commit.150 const finishedWork = root.current.alternate...

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ReactAnalysis.js

Source:ReactAnalysis.js Github

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1/**2 * react-dom/src/client/ReactDOM3 * 1. 内部调用legacyRenderSubtreeIntoContainer4 */5function render(6 element: React$Element<any>,7 container: Container,8 callback: ?Function9) {10 return legacyRenderSubtreeIntoContainer(11 null,12 element,13 container,14 false,15 callback16 )17}18/**19 * react-dom/src/client/ReactDOMLegacy.js20 * 2. mount和update：21 * updateContainer(children, fiberRoot, parentComponent, callback)22 * 改写callback，传入fiberRoot23 */24function legacyRenderSubtreeIntoContainer(25 parentComponent: ?React$Component<any, any>,26 children: ReactNodeList,27 container: Container,28 forceHydrate: boolean,29 callback: ?Function30) {31 let root = container._reactRootContainer32 let fiberRoot: FiberRoot33 if (!root) {34 // Initial mount35 // 初始化FiberRoot36 root = container._reactRootContainer = legacyCreateRootFromDOMContainer(37 container,38 forceHydrate39 )40 // 改写callback41 if (typeof callback === "function") {42 const originalCallback = callback43 callback = function () {44 const instance = getPublicRootInstance(fiberRoot)45 originalCallback.call(instance)46 }47 }48 // Initial mount should not be batched. 暂时不理解49 flushSync(() => {50 updateContainer(children, fiberRoot, parentComponent, callback)51 })52 } else {53 // fiberRoot = root; 同 mount54 //更新55 updateContainer(children, fiberRoot, parentComponent, callback)56 }57}58/**59 * react-reconciler/src/ReactFiberReconciler.New60 * 3. 关键函数61 * scheduleUpdateOnFiber 开启render的入口62 */63function updateContainer(64 element: ReactNodeList,65 container: OpaqueRoot,66 parentComponent: ?React$Component<any, any>,67 callback: ?Function68) {69 const current = container.current70 const eventTime = requestEventTime() // 时间戳71 const lane = requestUpdateLane(current) // 优先级72 // 应该与Provider上下文相关 + {parentContext + childContext} = fiber.stateNode.getChildContext();73 const context = getContextForSubtree(parentComponent)74 if (container.context === null) {75 container.context = context76 } else {77 container.pendingContext = context78 }79 // 建立update对象80 const update = createUpdate(eventTime, lane)81 update.payload = { element }82 update.callback = callback83 //current当前fiber fiber.share 下的两种环形update链表 interleaved 、 pending84 enqueueUpdate(current, update, lane)85 //调度更新吧，开启render入口86 scheduleUpdateOnFiber(current, lane, eventTime)87}88/**89 * react-reconciler/src/ReactFiberWorkLoop.new90 * 4.91 */92function scheduleUpdateOnFiber(fiber: Fiber, lane: Lane, eventTime: number) {93 // 开启 root FiberRoot94 ensureRootIsScheduled(root, eventTime)95}96/**97 * react-reconciler/src/ReactFiberWorkLoop.new98 * 5. 更新类型99 * 同步： scheduleLegacySyncCallback(performSyncWorkOnRoot.bind(null, root))100 * scheduleSyncCallback(performSyncWorkOnRoot.bind(null, root))101 * 异步： scheduleCallback(schedulerPriorityLevel,performConcurrentWorkOnRoot.bind(null, root))102 * 不做了解 supportsMicrotasks：flushSyncCallbacks() 来自./ReactFiberSyncTaskQueue.new103 */104function ensureRootIsScheduled(root: FiberRoot, currentTime: number) {105 let newCallbackNode106 // 同步107 if (newCallbackPriority === SyncLane) {108 // Special case: Sync React callbacks are scheduled on a special109 // internal queue110 if (root.tag === LegacyRoot) {111 scheduleLegacySyncCallback(performSyncWorkOnRoot.bind(null, root))112 } else {113 scheduleSyncCallback(performSyncWorkOnRoot.bind(null, root))114 }115 if (supportsMicrotasks) {116 // 绕过117 scheduleMicrotask(() => {118 if (executionContext === NoContext) {119 flushSyncCallbacks()120 }121 })122 } else {123 // Flush the queue in an Immediate task.124 scheduleCallback(ImmediateSchedulerPriority, flushSyncCallbacks)125 }126 newCallbackNode = null127 } else {128 // concurrent模式异步129 let schedulerPriorityLevel130 switch (lanesToEventPriority(nextLanes)) {131 case DiscreteEventPriority:132 schedulerPriorityLevel = ImmediateSchedulerPriority133 break134 case ContinuousEventPriority:135 schedulerPriorityLevel = UserBlockingSchedulerPriority136 break137 case DefaultEventPriority:138 schedulerPriorityLevel = NormalSchedulerPriority139 break140 case IdleEventPriority:141 schedulerPriorityLevel = IdleSchedulerPriority142 break143 default:144 schedulerPriorityLevel = NormalSchedulerPriority145 break146 }147 newCallbackNode = scheduleCallback(148 schedulerPriorityLevel,149 performConcurrentWorkOnRoot.bind(null, root) //异步150 )151 }152 root.callbackPriority = newCallbackPriority153 root.callbackNode = newCallbackNode154}155/**156 * React技术揭秘 render阶段 接轨157 * render阶段开始于performSyncWorkOnRoot或performConcurrentWorkOnRoot方法的调用。这取决于本次更新是同步更新还是异步更新。158 */159// performSyncWorkOnRoot会调用该方法160function workLoopSync() {161 while (workInProgress !== null) {162 performUnitOfWork(workInProgress)163 }164}165// performConcurrentWorkOnRoot会调用该方法166function workLoopConcurrent() {167 while (workInProgress !== null && !shouldYield()) {168 performUnitOfWork(workInProgress)169 }...

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index.js

Source:index.js Github

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...38 ){39 // deadline reached but currentTask hasn't expired.40 break;41 }42 //performConcurrentWorkOnRoot()43 const callback = currentTask.callback;44 if(typeof callback === 'function'){45 currentTask.callback = null;46 const continuationCallback = callback();47 if(typeof continuationCallback === 'function'){48 // set for next iteration in while loop to use.49 currentTask.callback = continuationCallback50 } else {51 // current task in taskQueue has finished.52 if(currentTask === peek(taskQueue)){53 pop(taskQueue);54 }55 }56 }...

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状态更新调用路径.js

Source:状态更新调用路径.js Github

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1/*2 *3触发状态更新（根据场景调用不同方法）4 1.ReactDOM.render5 2.this.setState6 3.this.forceUpdate7 4.useState8 5.useReducer9 |10 |11 v12创建Update对象（'updateContainer'）13 |14 |15 v16从fiber到root（`markUpdateLaneFromFiberToRoot`）17 （从触发状态更新的fiber一直向上遍历到rootFiber，并返回rootFiber。）18 |19 |20 v21调度更新（`ensureRootIsScheduled`） 同步/异步22 以下是ensureRootIsScheduled最核心的一段代码：23 if (newCallbackPriority === SyncLanePriority) {24 // 任务已经过期，需要同步执行render阶段25 newCallbackNode = scheduleSyncCallback(26 performSyncWorkOnRoot.bind(null, root)27 );28 } else {29 // 根据任务优先级异步执行render阶段30 var schedulerPriorityLevel = lanePriorityToSchedulerPriority(31 newCallbackPriority32 );33 newCallbackNode = scheduleCallback(34 schedulerPriorityLevel,35 performConcurrentWorkOnRoot.bind(null, root)36 );37 }38 |39 |40 v41render阶段（`performSyncWorkOnRoot` 或 `performConcurrentWorkOnRoot`）42 |43 |44 v45commit阶段（`commitRoot`）...

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render.js

Source:render.js Github

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...22 }23}24///////////////////////////// 25// 在Fiber上并发执行26function performConcurrentWorkOnRoot() {27 // render 阶段28 renderRootConcurrent();29 // commit 阶段30 commitRoot(root)31}32function renderRootConcurrent() {33 do {34 try {35 workLoopConcurrent();36 break;37 } catch (thrownValue) {38 handleError(root, thrownValue);39 }40 } while (true);...

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updateState.js

Source:updateState.js Github

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1// 触发状态更新2// |3// v4// 创建Update对象5// |6// v7// 从fiber到root8// |9// v10// 调度更新11// |12// v13// render阶段 - performSyncWorkOnRoot 或 performConcurrentWorkOnRoot14// |15// v...

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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.screenshot({ path: 'google.png' });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.screenshot({ path: 'google.png' });15 await browser.close();16})();17const playwright = require('playwright');18(async () => {19 const browser = await playwright['chromium'].launch({ headless: false });20 const context = await browser.newContext();21 const page = await context.newPage();22 await page.screenshot({ path: 'google.png' });23 await browser.close();24})();25const playwright = require('playwright');26(async () => {27 const browser = await playwright['chromium'].launch({ headless: false });28 const context = await browser.newContext();29 const page = await context.newPage();30 await page.screenshot({ path: 'google.png' });31 await browser.close();32})();33const playwright = require('playwright');34(async () => {35 const browser = await playwright['chromium'].launch({ headless: false });36 const context = await browser.newContext();37 const page = await context.newPage();38 await page.screenshot({ path: 'google.png' });39 await browser.close();40})();

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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.screenshot({ path: `example.png` });7 await browser.close();8})();

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

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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 const page = await browser.newPage();5 await page.screenshot({ path: 'example.png' });6 await browser.close();7})();

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Using AI Code Generation

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1const { Playwright } = require('playwright-core/lib/server/playwright');2const { createPageInContext } = require('playwright-core/lib/server/browserContext');3const { createJSHandle } = require('playwright-core/lib/server/frames');4const { Page } = require('playwright-core/lib/server/page');5const { ElementHandle } = require('playwright-core/lib/server/dom');6const { createExecutionContext } = require('playwright-core/lib/server/injected/injectedScript');7const { createEvaluateHandle } = require('playwright-core/lib/server/injected/injectedScriptSource');8const playwright = new Playwright();9const context = playwright.chromium.launchServer().then(async browserServer => {10 const browser = await browserServer.waitForBrowser();11 const context = await browser.newContext();12 const page = await context.newPage();13 page.evaluate(() => {14 const element = document.createElement('div');15 element.id = 'test';16 document.body.appendChild(element);17 });18 const elementHandle = await page.$('#test');19 const targetId = elementHandle._context._target._targetId;20 const frameId = elementHandle._context.frame._id;21 const objectId = elementHandle._remoteObject.objectId;22 const executionContext = createExecutionContext(context);23 const jsHandle = createJSHandle(executionContext, objectId);24 const evaluateHandle = createEvaluateHandle(executionContext, objectId);25 const newElementHandle = new ElementHandle(page, evaluateHandle, jsHandle);26 await page._delegate.performConcurrentWorkOnRoot(targetId, frameId, newElementHandle._remoteObject.objectId, async () => {27 await new Promise(resolve => setTimeout(resolve, 1000));28 });29 await context.close();30 await browserServer.close();31});32context();

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Using AI Code Generation

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1const { createServer } = require('http');2const { chromium } = require('playwright');3const { PlaywrightInternal } = require('playwright/lib/server/playwright.js');4const server = createServer(async (req, res) => {5 const playwright = new PlaywrightInternal();6 const browser = await playwright.chromium.launch({ headless: false });7 const page = await browser.newPage();8 const content = await page.content();9 res.end(content);10});11server.listen(3000, () => {12});

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Using AI Code Generation

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1const { performConcurrentWorkOnRoot } = require('playwright/lib/client/worker.js');2const { Page } = require('playwright/lib/client/page.js');3const { Frame } = require('playwright/lib/client/frame.js');4const { Worker } = require('playwright/lib/client/worker.js');5const { Connection } = require('playwright/lib/client/connection.js');6const { CDPSession } = require('playwright/lib/client/cdpsession.js');7const { ElementHandle } = require('playwright/lib/client/elementHandler.js');8const { JSHandle } = require('playwright/lib/client/jsHandle.js');9const { chromium } = require('playwright');10(async () => {11 const browser = await chromium.launch({ headless: false });12 const page = await browser.newPage();13 const frame = page.mainFrame();14 await frame.click('text=Get started');15 await frame.click('text=Docs');16 await frame.click('text=API');17 await frame.click('text=ElementHandle');

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Using AI Code Generation

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1const { chromium } = require('playwright');2const { _registerWorker } = require('playwright/lib/server/workerServer');3(async () => {4 const browser = await chromium.launch();5 const page = await browser.newPage();6 const worker = await _registerWorker(browser._browserContext, 'test.js');7 await worker.performConcurrentWorkOnRoot('test.js', { a: 1 });8 await browser.close();9})();10const { chromium } = require('playwright');11const { _registerWorker } = require('playwright/lib/server/workerServer');12(async () => {13 const browser = await chromium.launch();14 const page = await browser.newPage();15 const worker = await _registerWorker(browser._browserContext, 'test.js');16 await worker.performConcurrentWorkOnRoot('test.js', { a: 1 });17 await browser.close();18})();

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Using AI Code Generation

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1const { Playwright } = require('playwright');2const { createPlaywrightInternal } = require('playwright/lib/server/playwright.js');3const playwrightInternal = createPlaywrightInternal(new Playwright());4const { createPage } = require('playwright/lib/server/page.js');5const page = createPage('page1', playwrightInternal, null, null, null);6const { createFrame } = require('playwright/lib/server/frames.js');7const frame = createFrame('frame1', page, null, null);8const { createExecutionContext } = require('playwright/lib/server/frames.js');9const context = createExecutionContext('context1', frame, null);10context.evaluateHandleInUtility = function(script) {11 return Promise.resolve({ _guid: 'test' });12};13const work = {14 params: {15 expression: 'console.log("Hello World")',16 },17};18playwrightInternal.performConcurrentWorkOnRoot(context, work).then((result) => {19 console.log(result);20});21{ guid: 'test', type: 'object' }22const playwright = require('playwright');23(async () => {24 const browser = await playwright.chromium.launch();25 const page = await browser.newPage();26 await page.evaluate(() => {27 console.log('Hello World');28 });29 await browser.close();30})();31 at ExecutionContext._evaluateInternal (/home/aman/Projects/playwright-test/node_modules/playwright/lib/server/frames.js:131:19)32 at processTicksAndRejections (internal/process/task_queues.js:97:5)33 at async ExecutionContext.evaluate (/home/aman/Projects/playwright-test/node_modules/playwright/lib/server/frames.js:65:16)

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