Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Register for FREE! 
How to use performConcurrentWorkOnRoot method in Playwright Internal
Best JavaScript code snippet using playwright-internal
ReactFiberWorkLoop.js
Source:ReactFiberWorkLoop.js 
...190 }191 root.callbackNode = callbackNode;192}193// scheduleé¶æ®µç»æï¼è¿å
¥concurrent模å¼çrenderé¶æ®µ194function performConcurrentWorkOnRoot(root, didTimeout) {195 currentEventTime = NoWork;196 if (didTimeout) {197 // ç±äºcurrentEventTimeå·²ç»è¢«éç½®ï¼ä¸è¿æªå¤äºrenderæcommit198 // æ以currentTimeæ¯ä¸ä¸ªæ°çæ¶é´199 const currentTime = requestCurrentTimeForUpdate();200 // æ è®°ä»»å¡è¿æï¼è¿æ ·ensureRootIsScheduledæ¶ä¼ä»¥åæ¥ä»»å¡çå½¢å¼å¤ç该任å¡201 markRootExpiredAtTime(root, currentTime);202 ensureRootIsScheduled(root);203 return null;204 }205 const expirationTime = getNextRootExpirationTimeToWorkOn(root);206 if (expirationTime === NoWork) {207 return null;208 }...
Scheduler.js
Source:Scheduler.js
...325 const callback = currentTask.callback;326 if (typeof callback === 'function') {327 currentTask.callback = null;328 // å¯ä»¥æå½åä»»å¡æ¯å¦è¶
æ¶çä¿¡æ¯ï¼ä¼ éç»åè°ï¼æ¯å¦ï¼react ç performConcurrentWorkOnRoot æ¹æ³329 // å®ä¹ï¼function performConcurrentWorkOnRoot(root, didTimeout) { ... }330 // 使ç¨ï¼scheduleCallback(schedulerPriorityLevel, performConcurrentWorkOnRoot.bind(null, root));331 const didTimeout = currentTask.expirationTime <= currentTime;332 const continuationCallback = callback(didTimeout);333 // ç±äºæ们åè°å½¢å¼æ¯ï¼å¦æ没æ§è¡å®ï¼å°±è¿åå®èªèº«ï¼æ以è¿é表示该åè°ä¸æ¬¡è¿è¦ç»§ç»æ§è¡334 if (typeof continuationCallback === 'function') {335 currentTask.callback = continuationCallback;336 } else {337 // å½åä»»å¡å·²ç»æ§è¡å®äºï¼ä»éåä¸å¼¹åº338 if (currentTask === peek(taskQueue)) {339 pop(taskQueue);340 }341 }342 advanceTimers(currentTime);343 } else {...
FiberWorkLoop.js
Source:FiberWorkLoop.js
...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...
ReactAnalysis.js
Source:ReactAnalysis.js
1/**2 * react-dom/src/client/ReactDOM3 * 1. å
é¨è°ç¨legacyRenderSubtreeIntoContainer4 */5function render(6 element: React$Element<any>,7 container: Container,8 callback: ?Function9) {10 return legacyRenderSubtreeIntoContainer(11 null,12 element,13 container,14 false,15 callback16 )17}18/**19 * react-dom/src/client/ReactDOMLegacy.js20 * 2. mountåupdateï¼21 * updateContainer(children, fiberRoot, parentComponent, callback)22 * æ¹åcallbackï¼ä¼ å
¥fiberRoot23 */24function legacyRenderSubtreeIntoContainer(25 parentComponent: ?React$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 // åå§åFiberRoot36 root = container._reactRootContainer = legacyCreateRootFromDOMContainer(37 container,38 forceHydrate39 )40 // æ¹åcallback41 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. ææ¶ä¸ç解49 flushSync(() => {50 updateContainer(children, fiberRoot, parentComponent, callback)51 })52 } else {53 // fiberRoot = root; å mount54 //æ´æ°55 updateContainer(children, fiberRoot, parentComponent, callback)56 }57}58/**59 * react-reconciler/src/ReactFiberReconciler.New60 * 3. å
³é®å½æ°61 * scheduleUpdateOnFiber å¼å¯renderçå
¥å£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() // æ¶é´æ³71 const lane = requestUpdateLane(current) // ä¼å
级72 // åºè¯¥ä¸Providerä¸ä¸æç¸å
³ + {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ç«update对象80 const update = createUpdate(eventTime, lane)81 update.payload = { element }82 update.callback = callback83 //currentå½åfiber fiber.share ä¸ç两ç§ç¯å½¢updateé¾è¡¨ interleaved ã pending84 enqueueUpdate(current, update, lane)85 //è°åº¦æ´æ°å§ï¼å¼å¯renderå
¥å£86 scheduleUpdateOnFiber(current, lane, eventTime)87}88/**89 * react-reconciler/src/ReactFiberWorkLoop.new90 * 4.91 */92function scheduleUpdateOnFiber(fiber: Fiber, lane: Lane, eventTime: number) {93 // å¼å¯ root FiberRoot94 ensureRootIsScheduled(root, eventTime)95}96/**97 * react-reconciler/src/ReactFiberWorkLoop.new98 * 5. æ´æ°ç±»å99 * åæ¥ï¼ scheduleLegacySyncCallback(performSyncWorkOnRoot.bind(null, root))100 * scheduleSyncCallback(performSyncWorkOnRoot.bind(null, root))101 * å¼æ¥ï¼ scheduleCallback(schedulerPriorityLevel,performConcurrentWorkOnRoot.bind(null, root))102 * ä¸åäºè§£ supportsMicrotasksï¼flushSyncCallbacks() æ¥èª./ReactFiberSyncTaskQueue.new103 */104function ensureRootIsScheduled(root: FiberRoot, currentTime: number) {105 let newCallbackNode106 // åæ¥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 // ç»è¿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å¼å¼æ¥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) //å¼æ¥150 )151 }152 root.callbackPriority = newCallbackPriority153 root.callbackNode = newCallbackNode154}155/**156 * Reactææ¯æç§ renderé¶æ®µ æ¥è½¨157 * renderé¶æ®µå¼å§äºperformSyncWorkOnRootæperformConcurrentWorkOnRootæ¹æ³çè°ç¨ãè¿åå³äºæ¬æ¬¡æ´æ°æ¯åæ¥æ´æ°è¿æ¯å¼æ¥æ´æ°ã158 */159// performSyncWorkOnRootä¼è°ç¨è¯¥æ¹æ³160function workLoopSync() {161 while (workInProgress !== null) {162 performUnitOfWork(workInProgress)163 }164}165// performConcurrentWorkOnRootä¼è°ç¨è¯¥æ¹æ³166function workLoopConcurrent() {167 while (workInProgress !== null && !shouldYield()) {168 performUnitOfWork(workInProgress)169 }...
index.js
Source:index.js
...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 }...
状态更新调用路径.js
Source:状态更新调用路径.js
1/*2 *3触åç¶ææ´æ°ï¼æ ¹æ®åºæ¯è°ç¨ä¸åæ¹æ³ï¼4 1.ReactDOM.render5 2.this.setState6 3.this.forceUpdate7 4.useState8 5.useReducer9 |10 |11 v12å建Update对象ï¼'updateContainer'ï¼13 |14 |15 v16ä»fiberå°rootï¼`markUpdateLaneFromFiberToRoot`ï¼17 ï¼ä»è§¦åç¶ææ´æ°çfiberä¸ç´åä¸éåå°rootFiberï¼å¹¶è¿årootFiberãï¼18 |19 |20 v21è°åº¦æ´æ°ï¼`ensureRootIsScheduled`ï¼ åæ¥/å¼æ¥22 以ä¸æ¯ensureRootIsScheduledææ ¸å¿çä¸æ®µä»£ç ï¼23 if (newCallbackPriority === SyncLanePriority) {24 // ä»»å¡å·²ç»è¿æï¼éè¦åæ¥æ§è¡renderé¶æ®µ25 newCallbackNode = scheduleSyncCallback(26 performSyncWorkOnRoot.bind(null, root)27 );28 } else {29 // æ ¹æ®ä»»å¡ä¼å
级å¼æ¥æ§è¡renderé¶æ®µ30 var schedulerPriorityLevel = lanePriorityToSchedulerPriority(31 newCallbackPriority32 );33 newCallbackNode = scheduleCallback(34 schedulerPriorityLevel,35 performConcurrentWorkOnRoot.bind(null, root)36 );37 }38 |39 |40 v41renderé¶æ®µï¼`performSyncWorkOnRoot` æ `performConcurrentWorkOnRoot`ï¼42 |43 |44 v45commité¶æ®µï¼`commitRoot`ï¼...
render.js
Source:render.js
...22 }23}24///////////////////////////// 25// å¨Fiberä¸å¹¶åæ§è¡26function performConcurrentWorkOnRoot() {27 // render é¶æ®µ28 renderRootConcurrent();29 // commit é¶æ®µ30 commitRoot(root)31}32function renderRootConcurrent() {33 do {34 try {35 workLoopConcurrent();36 break;37 } catch (thrownValue) {38 handleError(root, thrownValue);39 }40 } while (true);...
updateState.js
Source:updateState.js
1// 触åç¶ææ´æ°2// |3// v4// å建Update对象5// |6// v7// ä»fiberå°root8// |9// v10// è°åº¦æ´æ°11// |12// v13// renderé¶æ®µ - performSyncWorkOnRoot æ performConcurrentWorkOnRoot14// |15// v...
Using AI Code Generation
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})();
Using AI Code Generation
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})();
Using AI Code Generation
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})();
Using AI Code Generation
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})();
Using AI Code Generation
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();
Using AI Code Generation
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});
Using AI Code Generation
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');
Using AI Code Generation
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})();
Using AI Code Generation
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)
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:
- 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.
- 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.
- 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.
- 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.
- Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.
Run Playwright Internal automation tests on LambdaTest cloud grid
Perform automation testing on 3000+ real desktop and mobile devices online.
Try LambdaTest Now !!
Get 100 minutes of automation test minutes FREE!!
Was this article helpful?
