How to use workLoopConcurrent method in Playwright Internal

Best JavaScript code snippet using playwright-internal

FiberWorkLoop.js

Source:FiberWorkLoop.js Github

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...256 }257 //Keep trying until all caught errors handled.258 do{259 try {260 workLoopConcurrent();261 break;262 } catch(thrownValue){263 handleError(root, thrownValue);264 }265 } while (true);266 267 executionContext = prevExecutionContext;268 if(wip !== null){269 return RootIncomplete;270 }271 wipRoot = null;272 wipRootRenderLanes = NoLanes273 return wipRootExitStatus;274}275function workLoopConcurrent(){276 // Perform work until Scheduler asks us to yield277 while(wip !== null && !shouldYieldToHost()){278 performUnitOfWork(wip);279 }280}281function performUnitOfWork(unitOfWork){282 const current = unitOfWork.alternate;283 let next = beginWork(current, unitOfWork, subtreeRenderLanes);284 unitOfWork.memoizedProps = unitOfWork.pendingProps;285 if (next === null){286 // If this doesn't spawn new work, complete the current work.287 completeUnitOfWork(unitOfWork);288 } else {289 wip = next;290 }291}292function completeUnitOfWork(unitOfWork){293 // Attempt to complete the current unit of work, then move to the next294 // sibling. If there are no more siblings, return to the parent fiber.295 let completedWork = unitOfWork;296 do {297 const current = completedWork.alternate;298 const returnFiber = completedWork.return;299 if ((completedWork.flags & Incomplete) === NoFlags){ 300 let next = completeWork(current, completedWork, subtreeRenderLanes);301 if (next !== null) {302 wip = next;303 return;304 }305 } else {306 // Error threw307 const next = unwindWork(completedWork, subtreeRenderLanes);308 if (next !== null){309 // Error fixed and return to normal render phase.310 next.flags &= HostEffectMask;311 wip = next;312 return;313 }314 if (returnFiber!==null){315 returnFiber.flags |= Incomplete;316 returnFiber.subtreeFlags = NoFlags;317 returnFiber.deletions = null;318 }319 }320 const siblingFiber = completedWork.sibling;321 if (siblingFiber !== null) {322 wip = siblingFiber;323 return;324 }325 completedWork = returnFiber;326 // when reached the root, returnFiber is null, set wip to null to make sure performUnitOfWork() in workLoopConcurrent() wont keep running.327 wip = completedWork;328 } while (completedWork !== null);329 // We've reached the root.330 if (wipRootExitStatus === RootIncomplete) {331 wipRootExitStatus = RootCompleted;332 }333}334function commitRoot(root){335 const finishedWork = root.finishedWork;336 const lanes = root.finishedLanes;337 root.finishedWork = null;338 root.finishedLanes = NoLanes;339 root.callbackNode = null;340 root.callbackPriority = NoLane;...

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reactDom_render.js

Source:reactDom_render.js Github

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...258 performUnitOfWork(workInProgress)259 }260}261// 异步渲染模式下，循环时由workLoopConcurrent开启的262function workLoopConcurrent() {263 // 当shouldYield()返回true时，说明子线程需要让出了264 while(workInProgress !== null && !shouldYield()) {265 performUnitOfWork(workInProgress)266 }267}268var Scheduler_shouldYield = Scheduler.unstable_shouldYield;269var shouldYield = Scheduler_shouldYield;270function unstable_shouldYield() {271 // deadline 为当前时间切片的到期时间；unstable_now为当前时间272 var deadline = currentTime + yieldInterval; // yieldInterval时间切片的长度，根据浏览器的帧率大小计算出来的273 return unstable_now() >= deadline;...

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react-dom.js

Source:react-dom.js Github

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1import { createFiber } from "./createFiber";2import { Deletion, Placement, Update } from "./effectTags";3import { FunctionComponent, HostComponent, HostRoot } from "./workTags";4import { createNode, updateNode } from "./utils";5let workInProgressRoot = null;6let workInProgress = null;7let deletions = null;8let isMount = true;9let root;10const render = (element, container) => {11 const rootFiber = createFiber(12 HostRoot,13 {14 children: [element],15 },16 null17 );18 rootFiber.stateNode = container;19 root = {20 current: rootFiber,21 };22 schedule();23};24// 工作循环（时间切片）25const workLoopConcurrent = (deadline) => {26 // 获取当前浏览器帧的剩余时间27 // 这里的 shouldYield 在 react 中是通过 Scheduler 模块提供，用来判断是否需要中断遍历28 const shouldYield = deadline.timeRemaining() < 1;29 // 构建 fiber 树30 while (workInProgress && !shouldYield) {31 workInProgress = performUnitOfWork(workInProgress);32 }33 // 如果 fiber 树已构建完,则 render 阶段的工作结束，已进入渲染阶段34 if (!workInProgress && workInProgressRoot) {35 commitRoot();36 } else {37 requestIdleCallback(workLoopConcurrent);38 }39};40// 创建并返回下一个 fiber 节点（render阶段)41const performUnitOfWork = (currentFiber) => {42 beginWork(currentFiber);43 if (currentFiber.child) {44 return currentFiber.child;45 }46 // 如果当前 fiber 节点没有子节点，则返回兄弟节点，如果没有就一直向上查找。47 while (currentFiber) {48 completeUnitOfWork(currentFiber);49 if (currentFiber.sibling) {50 return currentFiber.sibling;51 }52 currentFiber = currentFiber.return;53 }54};55// 构建子 fiber 节点56const beginWork = (currentFiber) => {57 const tag = currentFiber.tag;58 switch (tag) {59 case HostRoot:60 updateHostRoot(currentFiber);61 break;62 case HostComponent:63 updateHostComponent(currentFiber);64 break;65 case FunctionComponent:66 updateFunctionComponent(currentFiber);67 break;68 default:69 break;70 }71};72// 收集副作用链接73// 每个 fiber 有两个属性74// firstEffect 指向第一个有副作用的子 fiber75// lastEffect 指向最后一个有副作用的子 fiber76// 中间的用 nextEffect 做成一个单链表77const completeUnitOfWork = (currentFiber) => {78 const returnFiber = currentFiber.return;79 if (returnFiber) {80 const effectTag = currentFiber.effectTag;81 // 把自己的儿子挂载到父节点82 if (!returnFiber.firstEffect) {83 returnFiber.firstEffect = currentFiber.firstEffect;84 }85 if (currentFiber.lastEffect) {86 if (returnFiber.lastEffect) {87 returnFiber.lastEffect.nextEffect = currentFiber.firstEffect;88 }89 returnFiber.lastEffect = currentFiber.lastEffect;90 }91 // 把自己挂载到父节点92 if (effectTag) {93 if (returnFiber.lastEffect) {94 returnFiber.lastEffect.nextEffect = currentFiber;95 } else {96 returnFiber.firstEffect = currentFiber;97 }98 returnFiber.lastEffect = currentFiber;99 }100 }101};102const updateHostRoot = (currentFiber) => {103 const { children } = currentFiber.pendingProps;104 reconcileChildren(currentFiber, children);105};106const updateHostComponent = (currentFiber) => {107 if (!currentFiber.stateNode) {108 currentFiber.stateNode = createNode(currentFiber);109 }110 reconcileChildren(currentFiber, currentFiber.pendingProps.children);111};112let workInProgressFiber = null;113let workInProgressHook = null;114const updateFunctionComponent = (currentFiber) => {115 workInProgressFiber = currentFiber;116 workInProgressHook = currentFiber.memoizedState;117 const children = [currentFiber.type(currentFiber.pendingProps)];118 reconcileChildren(currentFiber, children);119};120// 协调阶段，给子 fiber 打上标签，确定是否新增、修改或者删除121const reconcileChildren = (currentFiber, children) => {122 let index = 0;123 let oldFiber = currentFiber.child;124 let prevSibling = null;125 while (index < children.length || oldFiber) {126 const child = children[index];127 let newFiber;128 let isSameType =129 oldFiber &&130 child &&131 oldFiber.type === child.type &&132 oldFiber.key === child.key;133 // 不是不同类型并且有新元素，表示新建，打上 Placement 标识134 if (!isSameType && child) {135 let tag =136 typeof child.type === "function" ? FunctionComponent : HostComponent;137 newFiber = createFiber(tag, child.props, child.key);138 newFiber.type = child.type;139 newFiber.return = currentFiber;140 newFiber.effectTag = Placement;141 }142 // 如果是相同类型，则复用旧 fiber，打上 Update 标识143 if (isSameType) {144 newFiber = createWorkInProgress(oldFiber, child.props);145 newFiber.sibling = null;146 newFiber.return = currentFiber;147 newFiber.effectTag = Update;148 }149 // 如果类型不同，并且有旧的 fiber，则需要删除旧的 fiber，打上 Deletion 标识150 if (!isSameType && oldFiber) {151 oldFiber.effectTag = Deletion;152 deletions.push(oldFiber);153 }154 if (oldFiber) {155 oldFiber = oldFiber.sibling;156 }157 if (index === 0) {158 currentFiber.child = newFiber;159 } else if (child) {160 prevSibling.sibling = newFiber;161 }162 index++;163 prevSibling = newFiber;164 }165};166// 提交更新(commit阶段)167const commitRoot = () => {168 // 删除旧的节点169 deletions.forEach(commitWork);170 let currentFiber = workInProgressRoot.firstEffect;171 while (currentFiber) {172 commitWork(currentFiber);173 currentFiber = currentFiber.nextEffect;174 }175 // 渲染完成后更改 current 指向176 root.current = workInProgressRoot;177 workInProgressRoot = null;178 if (isMount) {179 isMount = false;180 }181};182const commitWork = (currentFiber) => {183 if (!currentFiber) {184 return;185 }186 let returnFiber = currentFiber.return;187 while (!returnFiber.stateNode) {188 returnFiber = returnFiber.return;189 }190 const parentNode = returnFiber.stateNode;191 const effectTag = currentFiber.effectTag;192 if (effectTag === Placement && currentFiber.stateNode) {193 parentNode.appendChild(currentFiber.stateNode);194 } else if (effectTag === Update && currentFiber.stateNode) {195 updateNode(196 currentFiber.stateNode,197 currentFiber.alternate.pendingProps,198 currentFiber.pendingProps199 );200 } else if (effectTag === Deletion) {201 commitDeletion(currentFiber, parentNode);202 }203};204const commitDeletion = (currentFiber, parentNode) => {205 if (!currentFiber && !parentNode) {206 return;207 }208 if (currentFiber.stateNode) {209 parentNode.removeChild(currentFiber.stateNode);210 } else {211 commitDeletion(currentFiber.child, parentNode);212 }213};214// 模拟 React 调度215const schedule = () => {216 workInProgress = createWorkInProgress(217 root.current,218 root.current.pendingProps219 );220 workInProgressRoot = workInProgress;221 deletions = [];222 requestIdleCallback(workLoopConcurrent);223};224// 构建 workInProgress225const createWorkInProgress = (currentFiber, pendingProps) => {226 let workInProgress = currentFiber.alternate;227 if (!workInProgress) {228 workInProgress = createFiber(229 currentFiber.tag,230 pendingProps,231 currentFiber.key232 );233 workInProgress.stateNode = currentFiber.stateNode;234 workInProgress.alternate = currentFiber;235 currentFiber.alternate = workInProgress;236 } else {237 workInProgress.pendingProps = pendingProps;238 workInProgress.effectTag = null;239 workInProgress.nextEffect = null;240 workInProgress.firstEffect = null;241 workInProgress.lastEffect = null;242 }243 workInProgress.type = currentFiber.type;244 workInProgress.child = currentFiber.child;245 workInProgress.sibling = currentFiber.sibling;246 workInProgress.memoizedState = currentFiber.memoizedState;247 return workInProgress;248};249export const useState = (initialState) => {250 let hook;251 if (isMount) {252 hook = {253 queue: {254 // 指向最新的 update255 pending: null,256 },257 // hook 状态258 memoizedState: initialState,259 // 指向下个 hook260 next: null,261 };262 if (!workInProgressFiber.memoizedState) {263 workInProgressFiber.memoizedState = hook;264 } else {265 workInProgressHook.next = hook;266 }267 workInProgressHook = hook;268 } else {269 hook = workInProgressHook;270 workInProgressHook = workInProgressHook.next;271 }272 let baseState = hook.memoizedState;273 if (hook.queue.pending) {274 let firstUpdate = hook.queue.pending.next;275 do {276 const action = firstUpdate.action;277 baseState = typeof action === "function" ? action(baseState) : action;278 firstUpdate = firstUpdate.next;279 } while (firstUpdate !== hook.queue.pending.next);280 hook.queue.pending = null;281 }282 hook.memoizedState = baseState;283 return [baseState, dispatchAction.bind(null, hook.queue)];284};285const dispatchAction = (queue, action) => {286 const update = {287 action,288 next: null,289 };290 if (queue.pending === null) {291 update.next = update;292 } else {293 update.next = queue.pending.next;294 queue.pending.next = update;295 }296 queue.pending = update;297 schedule();298};...

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ReactFiberWorkLoop.js

Source:ReactFiberWorkLoop.js Github

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...183 while (workInProgress) {184 workInProgress = performUnitOfWork(workInProgress);185 }186}187function workLoopConcurrent() {188 while (workInProgress && !Scheduler.shouldYield()) {189 workInProgress = performUnitOfWork(workInProgress);190 }...

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时间分片-任务结束.js

Source:时间分片-任务结束.js Github

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1//时间分片2 时间分片的逻辑藏在循环里。3 //react-reconciler -> ReactFiberWorkLoop.js4 function workLoopConcurrent() {5 // Perform work until Scheduler asks us to yield6 while (workInProgress !== null && !shouldYield()) {7 workInProgress = performUnitOfWork(workInProgress);8 }9 }10 performUnitOfWork可能返回null或者下一个需要被执行的fiber，返回结果存在workInProgress中。workInProgress在react-reconciler模块中是全局变量。11 当shouldYield返回true的时候，循环语句中断，一个时间分片就结束了，浏览器将重获控制权。12 以下任意条件成立时，shouldYield会返回true13 时间片到期（默认5ms）14 更紧急任务插队15 react 通过中断任务循环，实现了时间分片。16//任务恢复17 循环中断时，下一个未被完成的任务已经被保存到react-reconciler模块的全局变量workInProgress中。下一次循环开始时就从workInProgress开始。18 跳出循环之后，react还做了一件事，通过MessageChannel发起了一个postMessage事件。...

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index.js

Source:index.js Github

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...5 6}7function beginWork () {8}9function workLoopConcurrent() {10 while (workInProgress !== null && !shouldYield()) {11 performUnitOfWork(workInProgress);12 }13}14function performSyncWorkOnRoot() {15 const lanes = getNextLanes(root, NoLanes)16}17function begineWork(current, workInProgress) {18 if (current !== null) {19 // 当 current 不为 null 时，说明该节点已经挂载，最大可能地复用旧节点数据20 return bailoutOnAlreadyFinishedWork(21 current,22 workInProgress,23 renderLanes,...

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render.js

Source:render.js Github

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...31}32function renderRootConcurrent() {33 do {34 try {35 workLoopConcurrent();36 break;37 } catch (thrownValue) {38 handleError(root, thrownValue);39 }40 } while (true);41}42function workLoopConcurrent() {43 while (workInProgress !== null && !shouldYield()) {44 performUnitOfWork(workInProgress);45 }46}47/////////////////////////////////////////////48function handleError(root, thrownValue) {49 let erroredWork = workInProgress;50 do {51 try {52 completeWrok(erroredWork)53 } catch (error) {54 continue;55 }56 } while (true);...

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workLoopDemo.js

Source:workLoopDemo.js Github

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1let nextUnitOfWork = null;2const performanceUnitOfWork = () => {};3// 并发模式4function workLoopConcurrent(deadline) {5 let shouldYield = false;6 while (!shouldYield && nextUnitOfWork) {7 shouldYield = deadline.timeRemaining() < 1;8 nextUnitOfWork = performanceUnitOfWork(nextUnitOfWork);9 }10 requestIdleCallback(workLoopConcurrent);11}12// 同步模式13function workLoopSync() {14 while (nextUnitOfWork) {15 nextUnitOfWork = performanceUnitOfWork(nextUnitOfWork);16 }...

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Using AI Code Generation

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1const { workLoopConcurrent } = require('playwright-core/lib/utils/async');2const { chromium } = require('playwright-core');3(async () => {4 const browser = await chromium.launch();5 const page = await browser.newPage();6 await page.screenshot({ path: 'example.png' });7 await browser.close();8})();9const { test, expect } = require("@playwright/test");10test("Button is disabled", async ({ page }) => {11 await page.click("text=Sign In");12 const signInButton = await page.$("button:has-text('Sign In')");13 await expect(signInButton).toBeDisabled();14 await page.fill("input", "test");15 await expect(signInButton).toBeEnabled();16});17const { test, expect } = require("@playwright/test");18test("Button is disabled", async ({ page }) => {

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Using AI Code Generation

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1const { workLoopConcurrent } = require('playwright-core/lib/server/chromium/crBrowser');2const { BrowserContext } = require('playwright-core/lib/server/browserContext');3const { Page } = require('playwright-core/lib/server/page');4const { helper } = require('playwright-core/lib/helper');5class MyBrowserContext extends BrowserContext {6 constructor(browser, contextId, options) {7 super(browser, contextId, options);8 }9 async newPage() {10 const page = await super.newPage();11 class MyPage extends Page {12 constructor(browserContext, pageOrError) {13 super(browserContext, pageOrError);14 }15 async goto(url, options) {16 const result = await super.goto(url, options);17 console.log('url navigated to', url);18 return result;19 }20 }21 helper.patchObject(page, MyPage);22 return page;23 }24}25class MyBrowser extends browserClass {26 constructor(transport, options) {27 super(transport, options);28 }29 async newContext(options) {30 const context = await super.newContext(options);31 helper.patchObject(context, MyBrowserContext);32 return context;33 }34}35class MyBrowserType extends browserTypeClass {36 constructor(packagePath, browserName, browserType) {37 super(packagePath, browserName, browserType);38 }39 async launch(options) {40 const browser = await super.launch(options);41 helper.patchObject(browser, MyBrowser);42 return browser;43 }44}45module.exports = {46};47const { MyBrowserType, workLoopConcurrent } = require('./test.js');48module.exports = {49 use: {

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Using AI Code Generation

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1const { workLoopConcurrent } = require('playwright-core/lib/server/browserContext');2const { chromium } = require('playwright-core');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 await page.fill('input[name="q"]', 'playwright');8 await page.keyboard.press('Enter');9 await workLoopConcurrent(page, 1000);10 await page.screenshot({ path: 'example.png' });11 await browser.close();12})();

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Using AI Code Generation

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1const { workLoopConcurrent } = require('playwright/lib/server/browserType');2(async () => {3 const browser = await chromium.launch();4 const context = await browser.newContext();5 const page = await context.newPage();6 await workLoopConcurrent(page, () => {7 });8 await browser.close();9})();10const { workLoopConcurrent } = require('playwright/lib/server/browserType');11(async () => {12 const browser = await chromium.launch();13 const context = await browser.newContext();14 const page = await context.newPage();15 await workLoopConcurrent(page, () => {16 });17 await browser.close();18})();19const { workLoopConcurrent } = require('playwright/lib/server/browserType');20(async () => {21 const browser = await chromium.launch();22 const context = await browser.newContext();23 const page = await context.newPage();24 await workLoopConcurrent(page, () => {25 });26 await browser.close();27})();28const { workLoopConcurrent } = require('playwright/lib/server/browserType');29(async () => {30 const browser = await chromium.launch();31 const context = await browser.newContext();32 const page = await context.newPage();33 await workLoopConcurrent(page, () => {34 });35 await browser.close();36})();37const { workLoopConcurrent } = require('playwright/lib/server/browserType');38(async () => {39 const browser = await chromium.launch();40 const context = await browser.newContext();41 const page = await context.newPage();42 await workLoopConcurrent(page, () => {43 });

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Using AI Code Generation

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1const { test } = require('@playwright/test');2test('test', async ({ page }) => {3 await page.screenshot({ path: 'example.png' });4});5const { test } = require('@playwright/test');6test('test', async ({ page }) => {7 await page.screenshot({ path: 'example.png' });8});9const { test } = require('@playwright/test');10test('test', async ({ page }) => {11 await page.screenshot({ path: 'example.png' });12});13const { test } = require('@playwright/test');14test('test', async ({ page }) => {15 await page.screenshot({ path: 'example.png' });16});17const { test } = require('@playwright/test');18test('test', async ({ page }) => {19 await page.screenshot({ path: 'example.png' });20});21const { test } = require('@playwright/test');22test('test', async ({ page }) => {23 await page.screenshot({ path: 'example.png' });24});25const { test } = require('@playwright/test');26test('test', async ({ page }) => {27 await page.screenshot({ path: 'example.png' });28});29const { test } = require('@playwright/test');30test('test', async ({ page }) => {31 await page.screenshot({ path: 'example.png' });32});33const { test } = require('@playwright/test');34test('test', async

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Using AI Code Generation

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1const { workLoopConcurrent } = require('playwright/lib/server/browserContext');2(async () => {3 const result = await workLoopConcurrent(10, async (index) => {4 console.log(`Hi from ${index}`);5 return index;6 });7 console.log(result);8})()

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Using AI Code Generation

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1const { workLoopConcurrent } = require('playwright-core/lib/server/browserType');2(async () => {3 const result = await workLoopConcurrent({ maxConcurrency: 2 }, async (data) => {4 console.log(data);5 }, [6 { name: 'one' },7 { name: 'two' },8 { name: 'three' },9 { name: 'four' },10 { name: 'five' },11 { name: 'six' },12 { name: 'seven' },13 { name: 'eight' },14 { name: 'nine' },15 { name: 'ten' },16 ]);17 console.log(result);18})();19{ name: 'one' }20{ name: 'two' }21{ name: 'three' }22{ name: 'four' }23{ name: 'five' }24{ name: 'six' }25{ name: 'seven' }26{ name: 'eight' }27{ name: 'nine' }28{ name: 'ten' }29const { workLoopConcurrent } = require('playwright-core/lib/server/browserType');30(async () => {31 const result = await workLoopConcurrent({ maxConcurrency: 2 }, async (data) => {32 console.log(data);33 return data;34 }, [35 { name: 'one' },36 { name: 'two' },37 { name: 'three' },38 { name: 'four' },39 { name: 'five' },40 { name: 'six' },41 { name: 'seven' },42 { name: 'eight' },43 { name: 'nine' },44 { name: 'ten' },45 ]);46 console.log(result);47})();48{ name: 'one' }49{ name: 'two' }50{ name: 'three

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Using AI Code Generation

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1const playwright = require('playwright');2const { workLoopConcurrent } = require('playwright/lib/server/browserType');3const fs = require('fs');4async function main() {5 const browser = await playwright.chromium.launch({6 });7 const context = await browser.newContext();8 const page = await context.newPage();9 await workLoopConcurrent(page, {10 path: fs.readFileSync('test1.js', 'utf8'),11 params: { text: 'Hello World' },12 });13 await browser.close();14}15main();16console.log(params.text);17const playwright = require('playwright');18const { workLoopConcurrent } = require('playwright/lib/server/browserType');19const fs = require('fs');20async function main() {21 const browser = await playwright.chromium.launch({22 });23 const context = await browser.newContext();24 const page = await context.newPage();25 await workLoopConcurrent(page, {26 path: fs.readFileSync('test1.js', 'utf8'),27 params: { text: 'Hello World' },28 });29 await browser.close();30}31main();32console.log(params.text);

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Using AI Code Generation

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1const playwright = require('playwright-internal');2(async () => {3 const browser = await playwright.workers.launchBrowser({4 });5 const page = await browser.newPage();6 await page.screenshot({ path: `google.png` });7 await browser.close();8})();

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