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How to use startCommitSnapshotEffectsTimer method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactDebugFiberPerf.js

Source:ReactDebugFiberPerf.js

...387    labelsInCurrentCommit.clear();388    endMark('(Committing Changes)', '(Committing Changes)', warning);389  }390}391export function startCommitSnapshotEffectsTimer(): void {392  if (enableUserTimingAPI) {393    if (!supportsUserTiming) {394      return;395    }396    effectCountInCurrentCommit = 0;397    beginMark('(Committing Snapshot Effects)');398  }399}400export function stopCommitSnapshotEffectsTimer(): void {401  if (enableUserTimingAPI) {402    if (!supportsUserTiming) {403      return;404    }405    const count = effectCountInCurrentCommit;...

commitRootImpl.js

Source:commitRootImpl.js

...65        // layout effects, and so on.66        // The first phase a "before mutation" phase. We use this phase to read the67        // state of the host tree right before we mutate it. This is where68        // getSnapshotBeforeUpdate is called.69        startCommitSnapshotEffectsTimer();70        prepareForCommit(root.containerInfo);71        nextEffect = firstEffect;72        do {73            {74                invokeGuardedCallback(null, commitBeforeMutationEffects, null);75                if (hasCaughtError()) {76                    (function () {77                        if (!(nextEffect !== null)) {78                            {79                                throw ReactError(Error("Should be working on an effect."));80                            }81                        }82                    })();83                    var error = clearCaughtError();84                    captureCommitPhaseError(nextEffect, error);85                    nextEffect = nextEffect.nextEffect;86                }87            }88        } while (nextEffect !== null);89        stopCommitSnapshotEffectsTimer();90        if (enableProfilerTimer) {91            // Mark the current commit time to be shared by all Profilers in this92            // batch. This enables them to be grouped later.93            recordCommitTime();94        } // The next phase is the mutation phase, where we mutate the host tree.95        startCommitHostEffectsTimer();96        nextEffect = firstEffect;97        do {98            {99                invokeGuardedCallback(null, commitMutationEffects, null, root, renderPriorityLevel);100                if (hasCaughtError()) {101                    (function () {102                        if (!(nextEffect !== null)) {103                            {104                                throw ReactError(Error("Should be working on an effect."));105                            }106                        }107                    })();108                    var _error = clearCaughtError();109                    captureCommitPhaseError(nextEffect, _error);110                    nextEffect = nextEffect.nextEffect;111                }112            }113        } while (nextEffect !== null);114        stopCommitHostEffectsTimer();115        resetAfterCommit(root.containerInfo); // The work-in-progress tree is now the current tree. This must come after116        // the mutation phase, so that the previous tree is still current during117        // componentWillUnmount, but before the layout phase, so that the finished118        // work is current during componentDidMount/Update.119        root.current = finishedWork; // The next phase is the layout phase, where we call effects that read120        // the host tree after it's been mutated. The idiomatic use case for this is121        // layout, but class component lifecycles also fire here for legacy reasons.122        startCommitLifeCyclesTimer();123        nextEffect = firstEffect;124        do {125            {126                invokeGuardedCallback(null, commitLayoutEffects, null, root, expirationTime);127                if (hasCaughtError()) {128                    (function () {129                        if (!(nextEffect !== null)) {130                            {131                                throw ReactError(Error("Should be working on an effect."));132                            }133                        }134                    })();135                    var _error2 = clearCaughtError();136                    captureCommitPhaseError(nextEffect, _error2);137                    nextEffect = nextEffect.nextEffect;138                }139            }140        } while (nextEffect !== null);141        stopCommitLifeCyclesTimer();142        nextEffect = null; // Tell Scheduler to yield at the end of the frame, so the browser has an143        // opportunity to paint.144        requestPaint();145        if (enableSchedulerTracing) {146            popInteractions(prevInteractions);147        }148        executionContext = prevExecutionContext;149    } else {150        // No effects.151        root.current = finishedWork; // Measure these anyway so the flamegraph explicitly shows that there were152        // no effects.153        // TODO: Maybe there's a better way to report this.154        startCommitSnapshotEffectsTimer();155        stopCommitSnapshotEffectsTimer();156        if (enableProfilerTimer) {157            recordCommitTime();158        }159        startCommitHostEffectsTimer();160        stopCommitHostEffectsTimer();161        startCommitLifeCyclesTimer();162        stopCommitLifeCyclesTimer();163    }164    stopCommitTimer();165    var rootDidHavePassiveEffects = rootDoesHavePassiveEffects;166    if (rootDoesHavePassiveEffects) {167        // This commit has passive effects. Stash a reference to them. But don't168        // schedule a callback until after flushing layout work....

finishSyncRender.js

Source:finishSyncRender.js

...43        const prevExecutionContext = executionContext;44        executionContext |= CommitContext;45        const prevInteractions = pushInteractions(root);46        ReactCurrentOwner.current = null;47        startCommitSnapshotEffectsTimer();48        prepareForCommit(root.containerInfo);49        nextEffect = firstEffect;50        do {51            try {52                commitBeforeMutationEffects();53            } catch (error) {54                invariant(nextEffect !== null, 'Should be working on an effect.');55                captureCommitPhaseError(nextEffect, error);56                nextEffect = nextEffect.nextEffect;57            }58        } while (nextEffect !== null);59        stopCommitSnapshotEffectsTimer();60        if (enableProfilerTimer) {61            recordCommitTime();62        }63        startCommitHostEffectsTimer();64        nextEffect = firstEffect;65        do {66            if (__DEV__) {67                invokeGuardedCallback(68                    null,69                    commitMutationEffects,70                    null,71                    root,72                    renderPriorityLevel,73                );74                if (hasCaughtError()) {75                    invariant(nextEffect !== null, 'Should be working on an effect.');76                    const error = clearCaughtError();77                    captureCommitPhaseError(nextEffect, error);78                    nextEffect = nextEffect.nextEffect;79                }80            } else {81                try {82                    commitMutationEffects(root, renderPriorityLevel);83                } catch (error) {84                    invariant(nextEffect !== null, 'Should be working on an effect.');85                    captureCommitPhaseError(nextEffect, error);86                    nextEffect = nextEffect.nextEffect;87                }88            }89        } while (nextEffect !== null);90        stopCommitHostEffectsTimer();91        resetAfterCommit(root.containerInfo);92        // The work-in-progress tree is now the current tree. This must come after93        // the mutation phase, so that the previous tree is still current during94        // componentWillUnmount, but before the layout phase, so that the finished95        // work is current during componentDidMount/Update.96        root.current = finishedWork;97        // The next phase is the layout phase, where we call effects that read98        // the host tree after it's been mutated. The idiomatic use case for this is99        // layout, but class component lifecycles also fire here for legacy reasons.100        startCommitLifeCyclesTimer();101        nextEffect = firstEffect;102        do {103            if (__DEV__) {104                invokeGuardedCallback(105                    null,106                    commitLayoutEffects,107                    null,108                    root,109                    expirationTime,110                );111                if (hasCaughtError()) {112                    invariant(nextEffect !== null, 'Should be working on an effect.');113                    const error = clearCaughtError();114                    captureCommitPhaseError(nextEffect, error);115                    nextEffect = nextEffect.nextEffect;116                }117            } else {118                try {119                    commitLayoutEffects(root, expirationTime);120                } catch (error) {121                    invariant(nextEffect !== null, 'Should be working on an effect.');122                    captureCommitPhaseError(nextEffect, error);123                    nextEffect = nextEffect.nextEffect;124                }125            }126        } while (nextEffect !== null);127        stopCommitLifeCyclesTimer();128        nextEffect = null;129        // Tell Scheduler to yield at the end of the frame, so the browser has an130        // opportunity to paint.131        requestPaint();132        if (enableSchedulerTracing) {133            popInteractions(((prevInteractions: any): Set < Interaction > ));134        }135        executionContext = prevExecutionContext;136    } else {137        // No effects.138        root.current = finishedWork;139        // Measure these anyway so the flamegraph explicitly shows that there were140        // no effects.141        // TODO: Maybe there's a better way to report this.142        startCommitSnapshotEffectsTimer();143        stopCommitSnapshotEffectsTimer();144        if (enableProfilerTimer) {145            recordCommitTime();146        }147        startCommitHostEffectsTimer();148        stopCommitHostEffectsTimer();149        startCommitLifeCyclesTimer();150        stopCommitLifeCyclesTimer();...

Using AI Code Generation

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.startCommitSnapshotEffectsTimer();7  await page.click('text=Get started');8  await page.stopCommitSnapshotEffectsTimer();9  await browser.close();10})();11{12}13startCommitSnapshotEffectsTimer()14stopCommitSnapshotEffectsTimer()15const { chromium } = require('playwright');16(async () => {17  const browser = await chromium.launch();18  const context = await browser.newContext();19  const page = await context.newPage();20  await page.startCommitSnapshotEffectsTimer();21  await page.click('text=Get started');22  await page.stopCommitSnapshotEffectsTimer();23  await browser.close();24})();

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3  const browser = await playwright.chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.evaluate(() => {7    window.playwright.startCommitSnapshotEffectsTimer();8  })9  await browser.close();10})();11const playwright = require('playwright');12(async () => {13  const browser = await playwright.chromium.launch();14  const context = await browser.newContext();15  const page = await context.newPage();16  await page.evaluate(() => {17    window.playwright.startCommitSnapshotEffectsTimer();18    const timeTaken = window.playwright.stopCommitSnapshotEffectsTimer();19    console.log(`Time taken to commit snapshot effects: ${timeTaken}ms`);20  })21  await browser.close();22})();23const playwright = require('playwright');24(async () => {25  const browser = await playwright.chromium.launch();26  const context = await browser.newContext();27  const page = await context.newPage();28  await page.evaluate(() => {29    window.playwright.startCommitSnapshotEffectsTimer();30    const timeTaken = window.playwright.getCommitSnapshotEffectsTimer();31    console.log(`Time taken to commit snapshot effects: ${timeTaken}ms`);32  })33  await browser.close();34})();35const playwright = require('playwright');36(async () => {37  const browser = await playwright.chromium.launch();38  const context = await browser.newContext();39  const page = await context.newPage();40  await page.evaluate(() => {

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3  const browser = await playwright.chromium.launch();4  const page = await browser.newPage();5  await page.startCommitSnapshotEffectsTimer();6  await page.evaluate(() => {7    const div = document.createElement('div');8    div.style.width = '100px';9    div.style.height = '100px';10    div.style.backgroundColor = 'red';11    document.body.appendChild(div);12  });13  await page.stopCommitSnapshotEffectsTimer();14  await browser.close();15})();16const playwright = require('playwright');17(async () => {18  const browser = await playwright.chromium.launch();19  const page = await browser.newPage();20  await page.startCommitSnapshotEffectsTimer();21  await page.evaluate(() => {22    const div = document.createElement('div');23    div.style.width = '100px';24    div.style.height = '100px';25    div.style.backgroundColor = 'red';26    document.body.appendChild(div);27  });28  await page.stopCommitSnapshotEffectsTimer();29  await browser.close();30})();31Error: Protocol error (DOMSnapshot.captureSnapshot): DOM snapshot not taken: page has been navigated32page.waitForNavigation()33page.waitForSelector()34const domSnapshot = await page.evaluate(() => {35        const snapshot = page._delegate._domSnapshot;36        return snapshot.captureSnapshot({

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3  const browser = await playwright.chromium.launch({4  });5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.startCommitSnapshotEffectsTimer();8  await page.stopCommitSnapshotEffectsTimer();9  await browser.close();10})();11stopCommitSnapshotEffectsTimer()12const playwright = require('playwright');13(async () => {14  const browser = await playwright.chromium.launch({15  });16  const context = await browser.newContext();17  const page = await context.newPage();18  await page.startCommitSnapshotEffectsTimer();19  await page.stopCommitSnapshotEffectsTimer();20  await browser.close();21})();22startLayoutTimer()23const playwright = require('playwright');24(async () => {25  const browser = await playwright.chromium.launch({26  });27  const context = await browser.newContext();28  const page = await context.newPage();29  await page.startLayoutTimer();30  await page.stopLayoutTimer();31  await browser.close();32})();

Using AI Code Generation

1const { startCommitSnapshotEffectsTimer } = require('playwright-core/lib/server/snapshot/snapshotter');2const { chromium } = require('playwright-core');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  startCommitSnapshotEffectsTimer(page);7  await page.screenshot({ path: 'example.png' });8  await browser.close();9})();

Using AI Code Generation

1const { test, expect } = require('@playwright/test');2const { startCommitSnapshotEffectsTimer } = require('@playwright/test/lib/server/snapshotter');3test('test', async ({ page }) => {4  await startCommitSnapshotEffectsTimer(page, 10000);5  await page.click('text=Get started');6  await page.waitForSelector('text=Get started');7  await page.click('text=Get started');8  await page.waitForSelector('text=Get started');9  await page.click('text=Get started');10  await page.waitForSelector('text=Get started');11  await page.click('text=Get started');12  await page.waitForSelector('text=Get started');13  await page.click('text=Get started');14  await page.waitForSelector('text=Get started');15  await page.click('text=Get started');16  await page.waitForSelector('text=Get started');17  await page.click('text=Get started');18  await page.waitForSelector('text=Get started');19  await page.click('text=Get started');20  await page.waitForSelector('text=Get started');21  await page.click('text=Get started');22  await page.waitForSelector('text=Get started');23  await page.click('text=Get started');24  await page.waitForSelector('text=Get started');25  await page.click('text=Get started');26  await page.waitForSelector('text=Get started');27  await page.click('text=Get started');28  await page.waitForSelector('text=Get started');29  await page.click('text=Get started');30  await page.waitForSelector('text=Get started');31  await page.click('text=Get started');32  await page.waitForSelector('text=Get started');33  await page.click('text=Get started');34  await page.waitForSelector('text=Get started');35  await page.click('text=Get started');36  await page.waitForSelector('text=Get started');37  await page.click('text=Get started');38  await page.waitForSelector('text=Get started');39  await page.click('text=Get started');40  await page.waitForSelector('text=Get started');41  await page.click('text=Get started');42  await page.waitForSelector('text=Get started');43  await page.click('text=Get started');44  await page.waitForSelector('text=Get started');45  await page.click('text=Get started');

Using AI Code Generation

1const { context } = require('playwright');2const { startCommitSnapshotEffectsTimer } = context;3startCommitSnapshotEffectsTimer();4const { chromium } = require('playwright-chromium');5(async () => {6  const browser = await chromium.launch();7  const page = await browser.newPage();8  await page.screenshot({ path: 'example.png' });9  await browser.close();10})();11const { context } = require('playwright');12const { startCommitSnapshotEffectsTimer } = context;13startCommitSnapshotEffectsTimer();14const { chromium } = require('playwright-chromium');15(async () => {16  const browser = await chromium.launch();17  const page = await browser.newPage();18  await page.screenshot({ path: 'example.png' });19  await browser.close();20})();21const { context } = require('playwright');22const { startCommitSnapshotEffectsTimer } = context;23startCommitSnapshotEffectsTimer();24const { chromium } = require('playwright-chromium');25(async () => {26  const browser = await chromium.launch();27  const page = await browser.newPage();28  await page.screenshot({ path: 'example.png' });29  await browser.close();30})();31const { context } = require('playwright');32const { startCommitSnapshotEffectsTimer } = context;33startCommitSnapshotEffectsTimer();34const { chromium } = require('playwright-chromium');35(async () => {36  const browser = await chromium.launch();37  const page = await browser.newPage();38  await page.screenshot({ path: 'example.png' });39  await browser.close();40})();

Using AI Code Generation

1const playwright = require('playwright');2const context = await playwright.chromium.launchPersistentContext('data-dir', { headless: false });3const page = await context.newPage();4await page.screenshot({ path: 'example.png' });5await page.context().startCommitSnapshotEffectsTimer();6await page.click('text=Docs');7await page.screenshot({ path: 'example2.png' });8await page.context().stopCommitSnapshotEffectsTimer();9const playwright = require('playwright');10const context = await playwright.chromium.launchPersistentContext('data-dir', { headless: false });11const page = await context.newPage();12await page.screenshot({ path: 'example.png' });13await page.context().startCommitSnapshotEffectsTimer();14await page.click('text=Docs');15await page.screenshot({ path: 'example2.png' });16await page.context().stopCommitSnapshotEffectsTimer();17const playwright = require('playwright');18const context = await playwright.chromium.launchPersistentContext('data-dir', { headless: false });19const page = await context.newPage();20await page.screenshot({ path: 'example.png' });21await page.context().startCommitSnapshotEffectsTimer();22await page.click('text=Docs');23await page.screenshot({ path: 'example2.png' });24await page.context().stopCommitSnapshotEffectsTimer();25const playwright = require('playwright');26const context = await playwright.chromium.launchPersistentContext('data-dir', { headless: false });27const page = await context.newPage();28await page.screenshot({ path: 'example.png' });29await page.context().startCommitSnapshotEffectsTimer();30await page.click('text=Docs');31await page.screenshot({ path: 'example2.png' });32await page.context().stopCommitSnapshotEffectsTimer();33const playwright = require('playwright');34const context = await playwright.chromium.launchPersistentContext('data-dir', { headless

Using AI Code Generation

1const playwright = require('playwright');2const { startCommitSnapshotEffectsTimer } = require('playwright/lib/server/chromium/crPage');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 startCommitSnapshotEffectsTimer(page);9  await page.screenshot({ path: 'example.png' });10  await browser.close();11})();12const playwright = require('playwright');13const { startCommitSnapshotEffectsTimer } = require('playwright/lib/server/chromium/crPage');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 startCommitSnapshotEffectsTimer(page);20  await page.screenshot({ path: 'example.png' });21  await browser.close();22})();23const playwright = require('playwright');24const { startCommitSnapshotEffectsTimer } = require('playwright/lib/server/chromium/crPage');25const { chromium } = playwright;26(async () => {27  const browser = await chromium.launch();28  const context = await browser.newContext();29  const page = await context.newPage();30  await startCommitSnapshotEffectsTimer(page);31  await page.screenshot({ path: 'example.png' });32  await browser.close();33})();34const playwright = require('playwright');35const { startCommitSnapshotEffectsTimer } = require('playwright/lib/server/chromium/crPage');36const { chromium } = playwright;37(async () => {38  const browser = await chromium.launch();

Using AI Code Generation

1const { chromium } = require('playwright');2const { startCommitSnapshotEffectsTimer } = require('playwright/lib/server/snapshotter/snapshotter');3const browser = await chromium.launch();4const context = await browser.newContext();5const page = await context.newPage();6await startCommitSnapshotEffectsTimer(page);7await page.screenshot({ path: 'google.png' });8await browser.close();9const { chromium } = require('playwright');10const { stopCommitSnapshotEffectsTimer } = require('playwright/lib/server/snapshotter/snapshotter');11const browser = await chromium.launch();12const context = await browser.newContext();13const page = await context.newPage();14await stopCommitSnapshotEffectsTimer(page);15await page.screenshot({ path: 'google.png' });16await browser.close();17const { chromium } = require('playwright');18const { getCommitSnapshotEffectsTimerResult } = require('playwright/lib/server/snapshotter/snapshotter');19const browser = await chromium.launch();20const context = await browser.newContext();21const page = await context.newPage();22await page.screenshot({ path: 'google.png' });23const result = await getCommitSnapshotEffectsTimerResult(page);24console.log(result);25await browser.close();26const { chromium } = require('playwright');27const { startCommitSnapshotEffectsTimer } = require('playwright/lib/server/snapshotter/snapshotter');28const browser = await chromium.launch();29const context = await browser.newContext();30const page = await context.newPage();31await startCommitSnapshotEffectsTimer(page);32await page.screenshot({ path: 'google.png' });33await browser.close();34const { chromium } = require('playwright');35const {

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.

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