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How to use pushRenderLanes method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberBeginWork.old.js

...567      const nextState: OffscreenState = {568        baseLanes: NoLanes,569      };570      workInProgress.memoizedState = nextState;571      pushRenderLanes(workInProgress, renderLanes);572    } else if (!includesSomeLane(renderLanes, (OffscreenLane: Lane))) {573      let nextBaseLanes;574      if (prevState !== null) {575        const prevBaseLanes = prevState.baseLanes;576        nextBaseLanes = mergeLanes(prevBaseLanes, renderLanes);577      } else {578        nextBaseLanes = renderLanes;579      }580      // Schedule this fiber to re-render at offscreen priority. Then bailout.581      if (enableSchedulerTracing) {582        markSpawnedWork((OffscreenLane: Lane));583      }584      workInProgress.lanes = workInProgress.childLanes = laneToLanes(585        OffscreenLane,586      );587      const nextState: OffscreenState = {588        baseLanes: nextBaseLanes,589      };590      workInProgress.memoizedState = nextState;591      // We're about to bail out, but we need to push this to the stack anyway592      // to avoid a push/pop misalignment.593      pushRenderLanes(workInProgress, nextBaseLanes);594      return null;595    } else {596      // Rendering at offscreen, so we can clear the base lanes.597      const nextState: OffscreenState = {598        baseLanes: NoLanes,599      };600      workInProgress.memoizedState = nextState;601      // Push the lanes that were skipped when we bailed out.602      const subtreeRenderLanes =603        prevState !== null ? prevState.baseLanes : renderLanes;604      pushRenderLanes(workInProgress, subtreeRenderLanes);605    }606  } else {607    let subtreeRenderLanes;608    if (prevState !== null) {609      subtreeRenderLanes = mergeLanes(prevState.baseLanes, renderLanes);610      // Since we're not hidden anymore, reset the state611      workInProgress.memoizedState = null;612    } else {613      // We weren't previously hidden, and we still aren't, so there's nothing614      // special to do. Need to push to the stack regardless, though, to avoid615      // a push/pop misalignment.616      subtreeRenderLanes = renderLanes;617    }618    pushRenderLanes(workInProgress, subtreeRenderLanes);619  }620  reconcileChildren(current, workInProgress, nextChildren, renderLanes);621  return workInProgress.child;622}623// Note: These happen to have identical begin phases, for now. We shouldn't hold624// ourselves to this constraint, though. If the behavior diverges, we should625// fork the function.626const updateLegacyHiddenComponent = updateOffscreenComponent;627function updateFragment(628  current: Fiber | null,629  workInProgress: Fiber,630  renderLanes: Lanes,631) {632  const nextChildren = workInProgress.pendingProps;...

ReactFiberBeginWork.new.js

Source: ReactFiberBeginWork.new.js

...563      const nextState: OffscreenState = {564        baseLanes: NoLanes,565      };566      workInProgress.memoizedState = nextState;567      pushRenderLanes(workInProgress, renderLanes);568    } else if (!includesSomeLane(renderLanes, (OffscreenLane: Lane))) {569      let nextBaseLanes;570      if (prevState !== null) {571        const prevBaseLanes = prevState.baseLanes;572        nextBaseLanes = mergeLanes(prevBaseLanes, renderLanes);573      } else {574        nextBaseLanes = renderLanes;575      }576      // Schedule this fiber to re-render at offscreen priority. Then bailout.577      if (enableSchedulerTracing) {578        markSpawnedWork((OffscreenLane: Lane));579      }580      workInProgress.lanes = workInProgress.childLanes = laneToLanes(581        OffscreenLane,582      );583      const nextState: OffscreenState = {584        baseLanes: nextBaseLanes,585      };586      workInProgress.memoizedState = nextState;587      // We're about to bail out, but we need to push this to the stack anyway588      // to avoid a push/pop misalignment.589      pushRenderLanes(workInProgress, nextBaseLanes);590      return null;591    } else {592      // Rendering at offscreen, so we can clear the base lanes.593      const nextState: OffscreenState = {594        baseLanes: NoLanes,595      };596      workInProgress.memoizedState = nextState;597      // Push the lanes that were skipped when we bailed out.598      const subtreeRenderLanes =599        prevState !== null ? prevState.baseLanes : renderLanes;600      pushRenderLanes(workInProgress, subtreeRenderLanes);601    }602  } else {603    let subtreeRenderLanes;604    if (prevState !== null) {605      subtreeRenderLanes = mergeLanes(prevState.baseLanes, renderLanes);606      // Since we're not hidden anymore, reset the state607      workInProgress.memoizedState = null;608    } else {609      // We weren't previously hidden, and we still aren't, so there's nothing610      // special to do. Need to push to the stack regardless, though, to avoid611      // a push/pop misalignment.612      subtreeRenderLanes = renderLanes;613    }614    pushRenderLanes(workInProgress, subtreeRenderLanes);615  }616  reconcileChildren(current, workInProgress, nextChildren, renderLanes);617  return workInProgress.child;618}619// Note: These happen to have identical begin phases, for now. We shouldn't hold620// ourselves to this constraint, though. If the behavior diverges, we should621// fork the function.622const updateLegacyHiddenComponent = updateOffscreenComponent;623function updateFragment(624  current: Fiber | null,625  workInProgress: Fiber,626  renderLanes: Lanes,627) {628  const nextChildren = workInProgress.pendingProps;...

FiberBeginWork.js

Source: FiberBeginWork.js

...76      workInProgress.memoizedState = null;77    } else{78      subtreeRenderLanes = renderLanes;79    }80    pushRenderLanes(workInProgress, subtreeRenderLanes);81  }82  // reconcileChildren()83  workInProgress.child = reconcileChildFibers(84      workInProgress,85      current,86      nextChildren,87      renderLanes88    );89  return workInProgress.child;90}91function updateFunctionComponent(current,workInProgress,renderLanes){92  let nextChildren = renderWithHooks(93    current,94    workInProgress,...

FiberWorkLoop.js

Source: FiberWorkLoop.js

...176      break;177    }178  }179}180export function pushRenderLanes(fiber, lanes){181  push(subtreeRenderLanesCursor, subtreeRenderLanes);182  subtreeRenderLanes = mergeLanes(subtreeRenderLanes, lanes);183  wipRootIncludedLanes = mergeLanes(184    wipRootIncludedLanes,185    lanes,186  );187}188export function popRenderLanes(){189  subtreeRenderLanes = subtreeRenderLanesCursor.current;190  pop(subtreeRenderLanesCursor);191}192function prepareFreshStack(root, lanes){193  if (wip !== null){194    console.error('Leftover work found:', wip);...

Using AI Code Generation

1const playwright = require('playwright');2const { chromium } = playwright;3(async () => {4  const browser = await chromium.launch({ headless: false });5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.waitForTimeout(2000);8  await page.evaluate(() => {9    window.__playwright__internal__pushRenderLanes([10    ]);11  });12  await page.waitForTimeout(2000);13  await page.evaluate(() => {14    window.__playwright__internal__pushRenderLanes([15    ]);16  });17  await page.waitForTimeout(2000);18  await page.evaluate(() => {19    window.__playwright__internal__pushRenderLanes([20    ]);21  });22  await page.waitForTimeout(2000);23  await page.evaluate(() => {24    window.__playwright__internal__pushRenderLanes([25    ]);26  });27  await page.waitForTimeout(2000);28  await page.evaluate(() => {29    window.__playwright__internal__pushRenderLanes([30    ]);31  });32  await page.waitForTimeout(2000);33  await page.evaluate(() => {34    window.__playwright__internal__pushRenderLanes([35    ]);36  });37  await page.waitForTimeout(2000);38  await page.evaluate(() => {39    window.__playwright__internal__pushRenderLanes([

Using AI Code Generation

1const playwright = require('playwright');2const { chromium } = playwright;3const browser = await chromium.launch({ headless: false });4const context = await browser.newContext();5const page = await context.newPage();6await page.evaluate(() => {7    window.playwright._internal.pushRenderLanes();8});9await page.screenshot({ path: 'screenshot.png' });10await browser.close();11const playwright = require('../playwright');12const { chromium } = playwright;13const playwright = require('../playwright');14const { chromium } = playwright;15const browser = await chromium.launch({ headless: false });16const context = await browser.newContext();17const page = await context.newPage();18await page.evaluate(() => {19    window.playwright._internal.pushRenderLanes();20});21await page.screenshot({ path: 'screenshot.png' });22await browser.close();

Using AI Code Generation

1import { chromium } from "playwright";2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  await page.pushRenderLanes([1,2,3]);6  await browser.close();7})();8import { chromium } from "playwright";9(async () => {10  const browser = await chromium.launch();11  const page = await browser.newPage();12  await page.pushRenderLanes([1,2,3]);13  await page.popRenderLanes();14  await browser.close();15})();16import { chromium } from "playwright";17(async () => {18  const browser = await chromium.launch();19  const page = await browser.newPage();20  await page.pushRenderLanes([1,2,3]);21  const lanes = await page.currentRenderLanes();22  console.log(lanes);23  await page.popRenderLanes();24  await browser.close();25})();26import { chromium } from "playwright";27(async () => {28  const browser = await chromium.launch();29  const page = await browser.newPage();30  await page.setRenderLanes([1,2,3]);31  await browser.close();32})();33import { chromium } from "playwright";34(async () => {35  const browser = await chromium.launch();36  const page = await browser.newPage();37  await page.pushRenderLanes([1,2,3]);38  await page.resetRenderLanes();39  await browser.close();40})();41import { chromium } from "playwright";42(async () => {43  const browser = await chromium.launch();44  const page = await browser.newPage();45  await page.pushRenderLanes([1,2,3]);46  await page.clearRenderLanes();47  await browser.close();48})();

Using AI Code Generation

1const playwright = require('playwright');2const { chromium } = require('playwright');3const { chromium } = require('playwright-chromium');4const { chromium } = require('playwright-firefox');5const { chromium } = require('playwright-webkit');6(async () => {7  const browser = await chromium.launch();8  const context = await browser.newContext();9  const page = await context.newPage();10  await page.pushRenderLanes(['lanes']);11  await page.screenshot({ path: 'example.png' });12  await browser.close();13})();14Chromium 91.0.4447.0 (r906812) linux

Using AI Code Generation

1const playwright = require('playwright');2const { chromium } = playwright;3const { pushRenderLanes } = require('playwright/internal');4(async () => {5    const browser = await chromium.launch({ headless: false });6    const context = await browser.newContext();7    const page = await context.newPage();8    await pushRenderLanes(page, '0x00000001');9    await page.screenshot({ path: 'example.png' });10    await browser.close();11})();12const { chromium } = require('playwright');13module.exports = {14};15chromium.pushRenderLanes(page, lanes)16const playwright = require('playwright');17const { chromium } = playwright;18const { pushRenderLanes } = require('playwright/internal');19(async () => {20    const browser = await chromium.launch({ headless: false });21    const context = await browser.newContext();22    const page = await context.newPage();23    await pushRenderLanes(page, '0x00000001');24    await page.screenshot({ path: 'example.png' });25    await browser.close();26})();27chromium.pushRenderLanes(page, lanes)28const playwright = require('playwright');29const { chromium } = playwright;30const { pushRenderLanes } = require('playwright/internal');31(async () => {32    const browser = await chromium.launch({ headless: false });33    const context = await browser.newContext();34    const page = await context.newPage();35    await pushRenderLanes(page, '0x00000001');36    await page.screenshot({ path: 'example.png' });37    await browser.close();38})();39chromium.criConnection(browser

Using AI Code Generation

1const playwright = require('playwright');2const { chromium } = playwright;3const { pushRenderLanes } = require('playwright/lib/server/supplements/recorder/recorderSupplement');4const { chromiumLauncher } = require('playwright/lib/server/launchServer');5const { chromiumProcess } = require('playwright/lib/server/chromium/crBrowser');6const { chromiumBrowserContext } = require('playwright/lib/server/chromium/crBrowser');7const { chromiumPage } = require('playwright/lib/server/chromium/crPage');8(async () => {9  const browser = await chromium.launch();10  const context = await browser.newContext();11  const page = await context.newPage();12  pushRenderLanes(page, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);13})();14const { helper } = require('../../helper');15const { assert } = require('../../helper');16const { debugError } = require('../../utils/debug');17const { createInstrumentationListener } = require('./recorderInstrumentation');18function pushRenderLanes(page, lanes) {19  assert(page, 'page');20  assert(Array.isArray(lanes), 'lanes');21  const crPage = page._delegate;22  crPage._renderLanes = crPage._renderLanes || new Set();23  for (const lane of lanes)24    crPage._renderLanes.add(lane);25}26class ChromiumLauncher extends BrowserTypeLauncher {27  async _launchServer(options) {28    const { logger, downloadsPath, proxy, devtools, headful, args = [], env = {}, ...rest } = options;29    const { launchedProcess, gracefullyClose, kill } = await launchProcess({30      executablePath: this.executablePath(),31      env: {32      },33      attemptToGracefullyClose: async () => {

Using AI Code Generation

1const { _electron: electron } = require('playwright');2const { contextBridge, ipcRenderer } = require('electron');3const { channels } = require('./constants');4contextBridge.exposeInMainWorld('playwright', {5  pushRenderLanes: (...lanes) => {6    electron.pushRenderLanes(lanes);7  },8});9ipcRenderer.on(channels.PUSH_RENDER_LANES, (event, lanes) => {10  playwright.pushRenderLanes(lanes);11});12window.addEventListener('DOMContentLoaded', () => {13  for (const channel in channels) {14    ipcRenderer.on(channels[channel], (event, ...args) => {15      window.dispatchEvent(new CustomEvent(channel, { detail: args }));16    });17  }18});19const { app, BrowserWindow, ipcMain } = require('electron');20const { channels } = require('./constants');21function createWindow() {22  const win = new BrowserWindow({23    webPreferences: {24      preload: path.join(__dirname, 'preload.js'),25    },26  });27  win.loadFile('index.html');28}29app.whenReady().then(() => {30  createWindow();31  app.on('activate', function () {32    if (BrowserWindow.getAllWindows().length === 0) createWindow();33  });34});35ipcMain.on(channels.PUSH_RENDER_LANES, (event, lanes) => {36  event.sender.send(channels.PUSH_RENDER_LANES, lanes);37});38module.exports.channels = {39};

Using AI Code Generation

1const { Playwright } = require('playwright')2const playwright = new Playwright()3playwrightInternalPage.pushRenderLanes([1,2,3])4playwrightInternalPage.popRenderLanes()5playwrightInternalPage.pushRenderLanes([4,5,6])6playwrightInternalPage.popRenderLanes()7playwrightInternalPage.pushRenderLanes([7,8,9])8playwrightInternalPage.popRenderLanes()9module.exports = {10  use: {11    viewport: { width: 1280, height: 720 },12  },13    {14      use: {15      }16    },17}

StackOverFlow community discussions

Questions

Discussion

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

firefox browser does not start 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

Is it possible to get the selector from a locator object 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

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

Assuming you are not running test with the --runinband flag, the simple answer is yes but it depends ????

There is a pretty comprehensive GitHub issue jest#6957 that explains certain cases of when tests are run concurrently or in parallel. But it seems to depend on a lot of edge cases where jest tries its best to determine the fastest way to run the tests given the circumstances.

To my knowledge there is no way to force jest to run in parallel.

Aside

Have you considered using playwright instead of puppeteer with jest? Playwright has their own internally built testing library called @playwright/test that is used in place of jest with a similar API. This library allows for explicitly defining test groups in a single file to run in parallel (i.e. test.describe.parallel) or serially (i.e. test.describe.serial). Or even to run all tests in parallel via a config option.

// parallel
test.describe.parallel('group', () => {
  test('runs in parallel 1', async ({ page }) => {});
  test('runs in parallel 2', async ({ page }) => {});
});

// serial
test.describe.serial('group', () => {
  test('runs first', async ({ page }) => {});
  test('runs second', async ({ page }) => {});
});

https://stackoverflow.com/questions/73497773/how-to-run-a-list-of-test-suites-in-a-single-file-concurrently-in-jest

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

Well this is one way, but not sure if it will work for all possible locators!.

// Get a selector from a playwright locator
import { Locator } from "@playwright/test";
export function extractSelector(locator: Locator) {
    const selector = locator.toString();
    const parts = selector.split("@");
    if (parts.length !== 2) { throw Error("extractSelector: susupect that this is not a locator"); }
    if (parts[0] !== "Locator") { throw Error("extractSelector: did not find locator"); }
    return parts[1];
}

https://stackoverflow.com/questions/72044959/is-it-possible-to-get-the-selector-from-a-locator-object-in-playwright

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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.