How to use finishSyncRender method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberWorkLoop.js

Source: ReactFiberWorkLoop.js Github

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...968 /​/​ will commit it even if something suspended.969 stopFinishedWorkLoopTimer();970 root.finishedWork = (root.current.alternate: any);971 root.finishedExpirationTime = expirationTime;972 finishSyncRender(root);973 }974 /​/​ Before exiting, make sure there's a callback scheduled for the next975 /​/​ pending level.976 ensureRootIsScheduled(root);977 }978 return null;979}980function finishSyncRender(root) {981 /​/​ Set this to null to indicate there's no in-progress render.982 workInProgressRoot = null;983 debugger;984 commitRoot(root);985}986export function flushRoot(root: FiberRoot, expirationTime: ExpirationTime) {987 markRootExpiredAtTime(root, expirationTime);988 ensureRootIsScheduled(root);989 if ((executionContext & (RenderContext | CommitContext)) === NoContext) {990 flushSyncCallbackQueue();991 }992}993export function flushDiscreteUpdates() {994 /​/​ TODO: Should be able to flush inside batchedUpdates, but not inside `act`....

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react-dom.js

Source: react-dom.js Github

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...1393 console.log(document.getElementById('root')._reactRootContainer)1394 /​/​commitfiber1395 root.finishedWork = root.current.alternate;1396 root.finishedExpirationTime = expirationTime;1397 finishSyncRender(root);1398 return null;1399}1400function finishSyncRender(root) {1401 /​/​ Set this to null to indicate there's no in-progress render.1402 /​/​ workInProgressRoot = null;1403 commitRoot(root);1404}1405function commitRoot(root) {1406 commitRootImpl(root, renderPriorityLevel = null);1407 return null;1408 /​/​https:/​/​mp.weixin.qq.com/​s?__biz=MzU1MDg1NTQ5NQ==&mid=2247484630&idx=1&sn=89a58e3eee0a37a53d2be14215a2276c&chksm=fb9b72feccecfbe8ec62eb2bd2beb85bbf97559d705ddd53d00e0d08d1a5c2391cca722fea3a&scene=21#wechat_redirect1409 /​/​渲染优先级1410 /​/​ImmediatePriority,优先级为 99,最高优先级,立即执行1411 /​/​bind函数,请看:https:/​/​developer.mozilla.org/​zh-CN/​docs/​Web/​JavaScript/​Reference/​Global_Objects/​Function/​bind1412 /​/​获取调度优先级,并临时替换当前的优先级,去执行传进来的 callback1413 var renderPriorityLevel = getCurrentPriorityLevel();1414 /​/​获取调度优先级,并临时替换当前的优先级,去执行传进来的 callback...

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MinReact.js

Source: MinReact.js Github

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...2236 nextEffect = null;2237 return null;2238}2239topLevelFunctionsRegister.push('finishSyncRender');2240function finishSyncRender(root) {2241 logFuncUsage(['finishSyncRender'], { root: root });2242 workInProgressRoot = null;2243 commitRoot(root);2244}2245topLevelFunctionsRegister.push('performSyncWorkOnRoot');2246function performSyncWorkOnRoot(root) {2247 logFuncUsage(['performSyncWorkOnRoot'], root);2248 if (root !== workInProgressRoot) {2249 prepareFreshStack(root);2250 }2251 if (workInProgress !== null) {2252 logFuncUsage(['reconsilation start']);2253 workLoopSync();2254 root.finishedWork = root.current.alternate;2255 logFuncUsage(['reconsilation finished'], performUnitOfWorkCounter);2256 performUnitOfWorkCounter = 0;2257 finishSyncRender(root);2258 }2259 return null;2260}2261topLevelFunctionsRegister.push('ensureRootIsScheduled');2262function ensureRootIsScheduled(root) {2263 logFuncUsage(['ensureRootIsScheduled'], { root: root });2264 scheduleSyncCallback(performSyncWorkOnRoot.bind(null, root));2265}2266topLevelFunctionsRegister.push('flushSyncCallbackQueue');2267function flushSyncCallbackQueue() {2268 logFuncUsage(['flushSyncCallbackQueue']);2269 immediateQueueCallbackNode = null;2270 var i = 0;2271 var _isSync = true;...

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OwnReact.js

Source: OwnReact.js Github

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...346 while (currentFiber !== null) {347 currentFiber = performUnitOfWork(currentFiber);348 }349}350function finishSyncRender(root) {351 console.log(['finishSyncRender'], { root: root });352 commitWork(root.child);353 finishedRootFiber = currentRootFiber;354 currentRootFiber = null;355}356function performSyncWorkOnRoot(root) {357 console.log(['performSyncWorkOnRoot'], root);358 if (currentFiber !== null) {359 workLoopSync();360 finishSyncRender(root);361 }362 return null;363}364requestIdleCallback(function () {365 performSyncWorkOnRoot(currentRootFiber);366});367function createFiberSimple(_a) {368 var element = _a.element, tag = _a.tag, _b = _a.parentFiber, parentFiber = _b === void 0 ? null : _b, _c = _a.stateNode, stateNode = _c === void 0 ? null : _c, _d = _a.alternate, alternate = _d === void 0 ? null : _d, _e = _a.effectTag, effectTag = _e === void 0 ? null : _e, _f = _a.memoizedState, memoizedState = _f === void 0 ? null : _f, _g = _a.pendingProps, pendingProps = _g === void 0 ? {} : _g, _h = _a.child, child = _h === void 0 ? null : _h;369 console.log(['createFiberSimple'], { element: element, tag: tag, parentFiber: parentFiber, stateNode: stateNode });370 return {371 alternate: alternate,372 tag: tag,373 stateNode: stateNode,374 effectTag: effectTag,...

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sidebar.js

Source: sidebar.js Github

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1const blog = [2 {3 title: "JS",4 collapsable: true,5 children: [6 "js/​手写系列",7 "js/​promise",8 "js/​运算符",9 "js/​预编译",10 "js/​clone",11 "js/​执行过程",12 "js/​箭头函数",13 "js/​闭包",14 "js/​元编程",15 "js/​原型",16 "js/​迭代器",17 "js/​EventLoop",18 "js/​0.1+0.2",19 ],20 },21 {22 title: "HTTP",23 collapsable: true,24 children: ["http/​HTTP协议1", "http/​HTTP缓存", "http/​DNS", "http/​TCP-IP"],25 },26 {27 title: "Node",28 collapsable: true,29 children: [30 "node/​自动加载全局路由",31 "node/​全局异常处理",32 "node/​使用Sequelize操作mySql",33 "node/​集成jwt",34 "node/​SSR",35 "node/​BFF架构初探",36 "node/​MPA架构初探",37 "node/​PM2",38 ],39 },40 {41 title: "前端工程化",42 collapsable: true,43 children: [44 "engineering/​打造属于自己的脚手架",45 "engineering/​脚手架的可视化操作",46 "engineering/​Jenkins安装",47 "engineering/​sonar简单使用",48 "engineering/​microbundle",49 ],50 },51 {52 title: "测试",53 collapsable: true,54 children: ["test/​jest", "test/​vue"],55 },56 {57 title: "性能优化",58 collapsable: true,59 children: [60 "optimization/​网速检测",61 "optimization/​资源阻塞",62 "optimization/​渲染流程",63 "optimization/​指标",64 "optimization/​Chrome性能分析",65 "optimization/​资源优化",66 "optimization/​传输加载优化",67 "optimization/​性能优化启示录",68 "optimization/​Node性能调优",69 "optimization/​MPA性能优化小试",70 ],71 },72 {73 title: "webpack",74 collapsable: true,75 children: [76 "webpack/​webpack基础",77 "webpack/​代码分割",78 "webpack/​webpack打包",79 "webpack/​源码解析一",80 "webpack/​源码解析二",81 "webpack/​源码解析三",82 "webpack/​源码解析四",83 "webpack/​源码解析五",84 "webpack/​源码解析六",85 "webpack/​源码分析总结",86 "webpack/​手写Webpack",87 "webpack/​webpack优化",88 "webpack/​webpack5",89 ],90 },91 {92 title: "TS",93 collapsable: true,94 children: [95 "ts/​基础",96 "ts/​进阶",97 "ts/​类与接口",98 "ts/​装饰器",99 "ts/​装饰器的使用",100 ],101 },102 {103 title: "Framework",104 collapsable: true,105 children: [106 "framework/​redux",107 "framework/​react-redux",108 "framework/​react-router",109 "framework/​hooks-redux",110 "framework/​koa",111 ],112 },113 {114 title: "前端安全",115 collapsable: true,116 children: ["safety/​encryption", "safety/​safe"],117 },118 {119 title: "Nginx",120 collapsable: true,121 },122 {123 title: "微前端",124 collapsable: true,125 },126 {127 title: "杂谈",128 collapsable: true,129 children: ["talk/​book", "talk/​2020"],130 },131];132/​/​ 算法133const arithmetic = [134 {135 title: "递归",136 collapsable: true,137 children: ["recursion/​递归"],138 },139 {140 title: "栈",141 collapsable: true,142 children: ["stack/​栈", "stack/​进制转换", "stack/​有效的括号"],143 },144 {145 title: "队列",146 collapsable: true,147 children: ["queue/​队列", "queue/​练习"],148 },149 {150 title: "链表",151 collapsable: true,152 children: ["linkedList/​链表", "linkedList/​套路", "linkedList/​手写LRU"],153 },154 {155 title: "树",156 collapsable: true,157 children: ["tree/​树", "tree/​解题套路"],158 },159 {160 title: "字典和散列表",161 collapsable: true,162 children: ["dictionary/​字典和散列表"],163 },164 {165 title: "集合",166 collapsable: true,167 children: ["set/​集合"],168 },169 {170 title: "排序",171 collapsable: true,172 children: ["sort/​排序和搜索"],173 },174];175const react = [176 {177 title: "基础",178 collapsable: true,179 children: [180 "API",181 "ReactElement",182 "JSX",183 "ReactChildren",184 "react-fiber",185 "requestAnimationFrame",186 "requestIdleCallback",187 ],188 },189 {190 title: "创建更新",191 collapsable: true,192 children: ["Render", "update", "Fiber", "expirationTime", "updateQueue"],193 },194 {195 title: "任务调度",196 collapsable: true,197 children: [198 "scheduleWork",199 "双缓存fiber树",200 "workLoopSync",201 "beginWork",202 "HostComponent",203 "ClassComponent",204 "completeUnitOfWork",205 "DOM创建",206 "finishSyncRender",207 ],208 },209 {210 title: "功能",211 collapsable: true,212 children: [213 "单节点Diff",214 "多节点Diff",215 "Context",216 "Ref",217 "memo",218 "setState",219 "合成事件",220 "SchedulerHostConfig.default",221 ],222 },223 {224 title: "Hooks",225 collapsable: true,226 children: ["useMemo", "useCallback", "useEffect", "useState"],227 },228];229module.exports = {230 "/​blog/​": blog,231 "/​arithmetic/​": arithmetic,232 "/​react/​": react,...

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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 context = await browser.newContext();5 const page = await context.newPage();6 await page.screenshot({ path: `example.png` });7 await page.close();8 await context.close();9 await browser.close();10})();11const { chromium } = require('playwright');12(async () => {13 const browser = await chromium.launch();14 const context = await browser.newContext();15 const page = await context.newPage();16 await context.finishSyncRender();17 await page.screenshot({ path: `example.png` });18 await page.close();19 await context.close();20 await browser.close();21})();

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Using AI Code Generation

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1const { chromium } = require('playwright');2const { finishSyncRender } = require('playwright/​lib/​server/​syncRender');3(async () => {4 const browser = await chromium.launch();5 const page = await browser.newPage();6 await page.setContent('<div>test</​div>');7 await finishSyncRender(page);8 await page.screenshot({ path: 'example.png' });9 await browser.close();10})();11{12 "scripts": {13 },14 "dependencies": {15 }16}

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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 context = await browser.newContext();5 const page = await context.newPage();6 const internal = page._delegate._page;7 await internal.finishSyncRender();8 await page.screenshot({ path: 'example.png' });9 await browser.close();10})();

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Using AI Code Generation

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1const playwright = require('playwright');2const { finishSyncRender } = require('playwright/​lib/​sync/​syncBrowserContext');3const { chromium } = playwright;4(async () => {5 const browser = await chromium.launch();6 const context = await browser.newContext();7 const page = await context.newPage();8 await finishSyncRender(page);9 await finishSyncRender(page);10 await browser.close();11})();12const playwright = require('playwright-web');13const { finishSyncRender } = require('playwright-web/​lib/​sync/​syncBrowserContext');14const { chromium } = playwright;15(async () => {16 const browser = await chromium.launch();17 const context = await browser.newContext();18 const page = await context.newPage();19 await finishSyncRender(page);20 await finishSyncRender(page);21 await browser.close();22})();

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Using AI Code Generation

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1const { finishSyncRender } = require('playwright/​lib/​server/​syncRender');2const { chromium } = require('playwright');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 await finishSyncRender(page);8 await page.screenshot({ path: `example.png` });9 await browser.close();10})();

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Using AI Code Generation

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1import { Page } from 'playwright';2const page = new Page();3await page.finishSyncRender();4import { Frame } from 'playwright';5const frame = new Frame(page, 'iframe');6await frame.finishSyncRender();7import { chromium } from 'playwright';8(async () => {9 const browser = await chromium.launch();10 const context = await browser.newContext();11 const page = await context.newPage();12 await page.finishSyncRender();13 await browser.close();14})();

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Using AI Code Generation

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1const { finishSyncRender } = require('playwright/​lib/​sync/​syncRender');2const { finishSyncRender } = require('playwright/​lib/​sync/​syncRender');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 page.click('text=Get started');9 await page.waitForSelector('text=Example');10 const result = await finishSyncRender();11 console.log(result);12 await browser.close();13})();

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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.screenshot({ path: 'example.png' });7 await browser.close();8})();9const { chromium } = require('playwright');10(async () => {11 const browser = await chromium.launch({headless: false});12 const context = await browser.newContext();13 const page = await context.newPage();14 await page.screenshot({ path: 'example.png' });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.screenshot({ path: 'example.png' });23 await browser.close();24})();25const { chromium } = require('playwright');26(async () => {27 const browser = await chromium.launch({headless: false});28 const context = await browser.newContext();29 const page = await context.newPage();30 await page.screenshot({ path: 'example.png' });31 await browser.close();32})();

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StackOverFlow community discussions

Questions
Discussion

Jest + Playwright - Test callbacks of event-based DOM library

firefox browser does not start in playwright

Is it possible to get the selector from a locator object in playwright?

How to run a list of test suites in a single file concurrently in jest?

Running Playwright in Azure Function

firefox browser does not start in playwright

This question is quite close to a "need more focus" question. But let's try to give it some focus:

Does Playwright has access to the cPicker object on the page? Does it has access to the window object?

Yes, you can access both cPicker and the window object inside an evaluate call.

Should I trigger the events from the HTML file itself, and in the callbacks, print in the DOM the result, in some dummy-element, and then infer from that dummy element text that the callbacks fired?

Exactly, or you can assign values to a javascript variable:

const cPicker = new ColorPicker({
  onClickOutside(e){
  },
  onInput(color){
    window['color'] = color;
  },
  onChange(color){
    window['result'] = color;
  }
})

And then

it('Should call all callbacks with correct arguments', async() => {
    await page.goto(`http://localhost:5000/tests/visual/basic.html`, {waitUntil:'load'})

    // Wait until the next frame
    await page.evaluate(() => new Promise(requestAnimationFrame))

    // Act
   
    // Assert
    const result = await page.evaluate(() => window['color']);
    // Check the value
})
https://stackoverflow.com/questions/65477895/jest-playwright-test-callbacks-of-event-based-dom-library

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