How to use commitBeforeMutationEffects method in Playwright Internal

Best JavaScript code snippet using playwright-internal

renderer.js

Source: renderer.js Github

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...89 flushSyncCallbackQueue();90 return null;91 /​/​ before mutation 阶段92 /​/​ 重点在下面这个函数93 function commitBeforeMutationEffects(finishedWork){94 while (nextEffect !== null) {95 const current = nextEffect.alternate;96 if(!shouldFireAfterActiveInstanceBlur && focusedInstanceHandle !== null){97 /​/​ focus blur相关98 }99 const effectTag = nextEffect.effectTag100 /​/​ 调用getSnapshotBeforeUpdate101 if((effectTag & Snapshot) !== NoEffect) {102 commitBeforeMutationEffectsOnFiber(current, nextEffect);103 }104 /​/​ 调用useEffect105 if((effectTag & Passive) !== NoEffect) {106 if(!rootDoseHavePassiveEffects) {107 rootDoseHavePassiveEffects = true;...

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FiberWorkLoop.js

Source: FiberWorkLoop.js Github

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...363 NoFlags;364 if (subtreeHasEffects || rootHasEffect){365 const prevExecutionContext= executionContext;366 executionContext |= CommitContext;367 commitBeforeMutationEffects(finishedWork);368 commitMutationEffects(root, finishedWork);369 commitLayoutEffects(finishedWork, root, lanes);370 371 executionContext = prevExecutionContext;372 } 373 root.current = finishedWork;374 375 const rootDidHavePassiveEffects = rootDoesHavePassiveEffects;376 if (rootDoesHavePassiveEffects){377 rootDoesHavePassiveEffects = false;378 rootWithPendingPassiveEffects = root;379 pendingPassiveEffectsLanes = lanes;380 }381 ensureRootIsScheduled(root, performance.now())...

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env.js

Source: env.js Github

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1const fs = require('fs');2const path = require('path');3const paths = require('./​paths');4/​/​ Make sure that including paths.js after env.js will read .env variables.5delete require.cache[require.resolve('./​paths')];6const NODE_ENV = process.env.NODE_ENV;7if (!NODE_ENV) {8 throw new Error(9 'The NODE_ENV environment variable is required but was not specified.'10 );11}12/​/​ https:/​/​github.com/​bkeepers/​dotenv#what-other-env-files-can-i-use13const dotenvFiles = [14 `${paths.dotenv}.${NODE_ENV}.local`,15 `${paths.dotenv}.${NODE_ENV}`,16 /​/​ Don't include `.env.local` for `test` environment17 /​/​ since normally you expect tests to produce the same18 /​/​ results for everyone19 NODE_ENV !== 'test' && `${paths.dotenv}.local`,20 paths.dotenv,21].filter(Boolean);22/​/​ Load environment variables from .env* files. Suppress warnings using silent23/​/​ if this file is missing. dotenv will never modify any environment variables24/​/​ that have already been set. Variable expansion is supported in .env files.25/​/​ https:/​/​github.com/​motdotla/​dotenv26/​/​ https:/​/​github.com/​motdotla/​dotenv-expand27dotenvFiles.forEach(dotenvFile => {28 if (fs.existsSync(dotenvFile)) {29 require('dotenv-expand')(30 require('dotenv').config({31 path: dotenvFile,32 })33 );34 }35});36/​/​ We support resolving modules according to `NODE_PATH`.37/​/​ This lets you use absolute paths in imports inside large monorepos:38/​/​ https:/​/​github.com/​facebook/​create-react-app/​issues/​253.39/​/​ It works similar to `NODE_PATH` in Node itself:40/​/​ https:/​/​nodejs.org/​api/​modules.html#modules_loading_from_the_global_folders41/​/​ Note that unlike in Node, only *relative* paths from `NODE_PATH` are honored.42/​/​ Otherwise, we risk importing Node.js core modules into an app instead of webpack shims.43/​/​ https:/​/​github.com/​facebook/​create-react-app/​issues/​1023#issuecomment-26534442144/​/​ We also resolve them to make sure all tools using them work consistently.45const appDirectory = fs.realpathSync(process.cwd());46process.env.NODE_PATH = (process.env.NODE_PATH || '')47 .split(path.delimiter)48 .filter(folder => folder && !path.isAbsolute(folder))49 .map(folder => path.resolve(appDirectory, folder))50 .join(path.delimiter);51/​/​ Grab NODE_ENV and REACT_APP_* environment variables and prepare them to be52/​/​ injected into the application via DefinePlugin in webpack configuration.53const REACT_APP = /​^REACT_APP_/​i;54function getClientEnvironment(publicUrl) {55 const raw = Object.keys(process.env)56 .filter(key => REACT_APP.test(key))57 .reduce(58 (env, key) => {59 env[key] = process.env[key];60 return env;61 },62 {63 /​/​ Useful for determining whether we’re running in production mode.64 /​/​ Most importantly, it switches React into the correct mode.65 NODE_ENV: process.env.NODE_ENV || 'development',66 /​/​ Useful for resolving the correct path to static assets in `public`.67 /​/​ For example, <img src={process.env.PUBLIC_URL + '/​img/​logo.png'} /​>.68 /​/​ This should only be used as an escape hatch. Normally you would put69 /​/​ images into the `src` and `import` them in code to get their paths.70 PUBLIC_URL: publicUrl,71 /​/​ We support configuring the sockjs pathname during development.72 /​/​ These settings let a developer run multiple simultaneous projects.73 /​/​ They are used as the connection `hostname`, `pathname` and `port`74 /​/​ in webpackHotDevClient. They are used as the `sockHost`, `sockPath`75 /​/​ and `sockPort` options in webpack-dev-server.76 WDS_SOCKET_HOST: process.env.WDS_SOCKET_HOST,77 WDS_SOCKET_PATH: process.env.WDS_SOCKET_PATH,78 WDS_SOCKET_PORT: process.env.WDS_SOCKET_PORT,79 }80 );81 /​/​ Stringify all values so we can feed into webpack DefinePlugin82 const stringified = {83 'process.env': Object.keys(raw).reduce((env, key) => {84 env[key] = JSON.stringify(raw[key]);85 return env;86 }, {}),87 "__DEV__": false,88 "__PROFILE__": true,89 "__EXPERIMENTAL__": true,90 "__UMD__": true,91 __NEW_RECONCILER__: true,92 '__LOG_NAMES__': JSON.stringify([93 /​/​ 'createRoot',94 /​/​ 'ReactDOMRoot',95 /​/​ 'createRootImpl',96 /​/​ 'createContainer',97 /​/​ 'createFiberRoot',98 /​/​ 'createHostRootFiber',99 /​/​ 'createFiber',100 /​/​ 'FiberNode',101 /​/​ 'initializeUpdateQueue',102 /​/​ 'markContainerAsRoot',103 /​/​ 'listenToAllSupportedEvents',104 /​/​ 'jsx',105 'render',106 /​/​ 'updateContainer',107 /​/​ 'enqueueUpdate',108 /​/​ 'scheduleUpdateOnFiber',109 /​/​ 'ensureRootIsScheduled',110 /​/​ 'unstable_scheduleCallback',111 /​/​ 'requestHostCallback',112 /​/​ 'performWorkUntilDeadline',113 /​/​ 'flushWork',114 /​/​ 'workLoop',115 /​/​ 'performConcurrentWorkOnRoot',116 /​/​ 'flushPassiveEffects',117 /​/​ 'renderRootConcurrent',118 /​/​ 'prepareFreshStack',119 /​/​ 'createWorkInProgress',120 /​/​ 'createFiber',121 /​/​ 'FiberNode',122 /​/​ 'performUnitOfWork',123 /​/​ 'beginWork',124 /​/​ 'setInitialDOMProperties',125 /​/​ 'setInitialProperties',126 /​/​ 'diffProperties',127 /​/​ 'dispatchEvent',128 /​/​ 'mountIndeterminateComponent',129 /​/​ 'renderWithHooks',130 'useState',131 /​/​ 'mountState',132 /​/​ 'mountWorkInProgressHook',133 /​/​ 'updateHostRoot',134 /​/​ 'cloneUpdateQueue',135 /​/​ 'processUpdateQueue',136 /​/​ 'getStateFromUpdate',137 /​/​ 'reconcileChildren',138 /​/​ 'reconcileChildFibers',139 /​/​ 'reconcileChildrenArray',140 /​/​ 'createChild',141 /​/​ 'mountChildFibers',142 /​/​ 'createFiberFromElement',143 /​/​ 'createFiberFromTypeAndProps',144 /​/​ 'completeUnitOfWork',145 /​/​ 'completeWork',146 /​/​ 'commitRootImpl',147 /​/​ 'commitBeforeMutationEffects',148 /​/​ 'commitBeforeMutationEffectsImpl',149 /​/​ 'commitBeforeMutationLifeCycles',150 /​/​ 'clearContainer',151 /​/​ 'commitMutationEffectsImpl',152 /​/​ 'commitPlacement',153 /​/​ 'getHostParentFiber',154 /​/​ 'getHostSibling',155 /​/​ 'insertOrAppendPlacementNodeIntoContainer',156 /​/​ 'insertOrAppendPlacementNode',157 /​/​ 'trapClickOnNonInteractiveElement',158 /​/​ 'resetAfterCommit',159 /​/​ 'restoreSelection',160 /​/​ 'recursivelyCommitLayoutEffects',161 /​/​ 'ensureRootIsScheduled',162 /​/​ 'createInstance',163 /​/​ 'createElement',164 /​/​ 'updateFiberProps',165 /​/​ 'bubbleProperties',166 /​/​ 'dispatchDiscreteEvent',167 /​/​ 'createEventListenerWrapperWithPriority',168 'updateWorkInProgressHook'169 ]),170 };171 return { raw, stringified };172}...

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ReactFiberWorkLoop.js

Source: ReactFiberWorkLoop.js Github

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...125 if (firstEffect) {126 nextEffect = firstEffect;127 do {128 try {129 nextEffect = commitBeforeMutationEffects(nextEffect);130 } catch (e) {131 nextEffect = nextEffect.nextEffect;132 }133 } while (nextEffect)134 nextEffect = firstEffect;135 do {136 try {137 nextEffect = commitMutationEffects(root, nextEffect);138 } catch (e) {139 nextEffect = nextEffect.nextEffect;140 }141 } while (nextEffect)142 }143}...

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ReactFiberCommitWork.js

Source: ReactFiberCommitWork.js Github

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...3import {4 insertInContainerBefore,5 appendChildToContainer6} from 'reactDOM/​ReactHostConfig';7export function commitBeforeMutationEffects(nextEffect) {8 while (nextEffect) {9 return nextEffect = null;10 }11}12function getHostParentFiber(fiber) {13 let parent = fiber.return;14 while (parent) {15 if (isHostParent(parent)) {16 return parent;17 }18 parent = parent.return;19 }20}21function isHostParent(parent) {...

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commits.js

Source: commits.js Github

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1function commitBeforeMutationEffects() {2 while (nextEffect !== null) {3 const effectTag = nextEffect.effectTag;4 if ((effectTag & Snapshot) !== NoEffect) {5 setCurrentDebugFiberInDEV(nextEffect);6 recordEffect();7 const current = nextEffect.alternate;8 commitBeforeMutationEffectOnFiber(current, nextEffect);9 resetCurrentDebugFiberInDEV();10 }11 if ((effectTag & Passive) !== NoEffect) {12 if (!rootDoesHavePassiveEffects) {13 rootDoesHavePassiveEffects = true;14 scheduleCallback(NormalPriority, () => {15 flushPassiveEffects();...

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commitRoot.js

Source: commitRoot.js Github

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...17 let firstEffect = root.firstEffect18 if (firstEffect !== null) {19 console.log('has effect')20 nextEffect = firstEffect21 commitBeforeMutationEffects()22 nextEffect = firstEffect23 commitMutationEffects(root)24 nextEffect = firstEffect25 commitLayoutEffects(root)26 }27}28function commitBeforeMutationEffects() {29 console.log('function commit before mutation effects')30 while(nextEffect !== null) {31 nextEffect = nextEffect.nextEffect32 }33}34function commitMutationEffects(root) {35 console.log('function commit Mutation Effects')36 while(nextEffect !== null) {37 console.log(nextEffect.name)38 const flags = nextEffect.flags39 if (flags & ContentReset) {40 /​/​ 重置 text 内容41 }42 if (flags & Ref) {...

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commitRootImpl.js

Source: commitRootImpl.js Github

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1function commitRootImpl(root) {2 let firstEffect = null;3 nextEffect = firstEffect;4 do {5 commitBeforeMutationEffects();6 } while (nextEffect !== null);7 /​/​ mutation phase8 nextEffect = firstEffect;9 do {10 commitMutationeffects(root);11 } while (nextEffect !== null);12 /​/​ layout phase13}14function commitBeforeMutationEffects() {15 while (nextEffect !== null) {16 const current = nextEffect.alternate17 const flags = nextEffect.flags;18 if ((flags & Snapshot) !== NoFlags) {19 commitBeforeMutationEffectOnFiber(current, nextEffect);20 }21 if ((flags & Passive) !== NoFlags) {22 if (!rootDoesHavePassiveEffects) {23 rootDoesHavePassiveEffects = true24 scheduleCallback(() => {25 flushPassiveEffects()26 })27 }28 }...

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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.commitBeforeMutationEffects();7 await page.screenshot({ path: 'example.png' });8 await browser.close();9})();

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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.commitBeforeMutationEffects();7 await browser.close();8})();9const { chromium } = require('playwright');10(async () => {11 const browser = await chromium.launch();12 const context = await browser.newContext();13 const page = await context.newPage();14 await page.commitAfterMutationEffects();15 await browser.close();16})();17const { chromium } = require('playwright');18(async () => {19 const browser = await chromium.launch();20 const context = await browser.newContext();21 const page = await context.newPage();22 await page.commitMutationEffects();23 await browser.close();24})();25const { chromium } = require('playwright');26(async () => {27 const browser = await chromium.launch();28 const context = await browser.newContext();29 const page = await context.newPage();30 await page.commitMutationEffects();31 await browser.close();32})();33const { chromium } = require('playwright');34(async () => {35 const browser = await chromium.launch();36 const context = await browser.newContext();37 const page = await context.newPage();38 await page.commitMutationEffects();39 await browser.close();40})();41const { chromium } = require('playwright');42(async () => {43 const browser = await chromium.launch();44 const context = await browser.newContext();45 const page = await context.newPage();46 await page.commitMutationEffects();47 await browser.close();48})();

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

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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.commitBeforeMutationEffects();6 await page.screenshot({ path: `screenshot.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.commitBeforeMutationEffects();6 await page.screenshot({ path: `google.png` });7 await browser.close();8})();9const { chromium } = require('playwright');10(async () => {11 const browser = await chromium.launch();12 const page = await browser.newPage();13 await page.commitAfterMutationEffects();14 await page.screenshot({ path: `google.png` });15 await browser.close();16})();17const { chromium } = require('playwright');18(async () => {19 const browser = await chromium.launch();20 const page = await browser.newPage();21 await page.commitMutationEffects();22 await page.screenshot({ path: `google.png` });23 await browser.close();24})();25const { chromium } = require('playwright');26(async () => {27 const browser = await chromium.launch();28 const page = await browser.newPage();29 await page.flush();30 await page.screenshot({ path: `google.png` });31 await browser.close();32})();33const { chromium } = require('playwright');34(async () => {35 const browser = await chromium.launch();36 const page = await browser.newPage();37 await page.flush();38 await page.screenshot({ path: `google.png` });39 await browser.close();40})();41const { chromium } = require('playwright');42(async () => {43 const browser = await chromium.launch();44 const page = await browser.newPage();45 await page.flush();46 await page.screenshot({ path: `google.png` });

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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();4 const page = await browser.newPage();5 await page.fill('input[name="q"]', 'Playwright');6 await page.commitBeforeMutationEffects();7 await page.click('input[name="btnK"]');8 await page.waitForLoadState('networkidle');9 await page.screenshot({ path: 'example.png' });10 await browser.close();11})();

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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.click('text="Get Started"');6 await page.click('text="Docs"');

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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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