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How to use unstable_subscribe method in Playwright Internal

Best JavaScript code snippet using playwright-internal

scheduler-tracing.production.min.js

Source:scheduler-tracing.production.min.js

...32      this,33      arguments34    );35  }36  function unstable_subscribe() {37    // eslint-disable-next-line max-len38    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.SchedulerTracing.unstable_subscribe.apply(39      this,40      arguments41    );42  }43  function unstable_trace() {44    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.SchedulerTracing.unstable_trace.apply(45      this,46      arguments47    );48  }49  function unstable_unsubscribe() {50    // eslint-disable-next-line max-len...

scheduler-tracing.development.js

Source:scheduler-tracing.development.js

...32      this,33      arguments34    );35  }36  function unstable_subscribe() {37    // eslint-disable-next-line max-len38    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.SchedulerTracing.unstable_subscribe.apply(39      this,40      arguments41    );42  }43  function unstable_trace() {44    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.SchedulerTracing.unstable_trace.apply(45      this,46      arguments47    );48  }49  function unstable_unsubscribe() {50    // eslint-disable-next-line max-len...

scheduler-tracing.profiling.min.js

Source:scheduler-tracing.profiling.min.js

...32      this,33      arguments34    );35  }36  function unstable_subscribe() {37    // eslint-disable-next-line max-len38    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.SchedulerTracing.unstable_subscribe.apply(39      this,40      arguments41    );42  }43  function unstable_trace() {44    return global.React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.SchedulerTracing.unstable_trace.apply(45      this,46      arguments47    );48  }49  function unstable_unsubscribe() {50    // eslint-disable-next-line max-len...

tracing.js

Source:tracing.js

1import { c as createCommonjsModule } from '../common/_commonjsHelpers-668e6127.js';2/** @license React v0.20.23 * scheduler-tracing.production.min.js4 *5 * Copyright (c) Facebook, Inc. and its affiliates.6 *7 * This source code is licensed under the MIT license found in the8 * LICENSE file in the root directory of this source tree.9 */10var b=0;var __interactionsRef=null;var __subscriberRef=null;var unstable_clear=function(a){return a()};var unstable_getCurrent=function(){return null};var unstable_getThreadID=function(){return ++b};var unstable_subscribe=function(){};var unstable_trace=function(a,d,c){return c()};var unstable_unsubscribe=function(){};var unstable_wrap=function(a){return a};11var schedulerTracing_production_min = {12	__interactionsRef: __interactionsRef,13	__subscriberRef: __subscriberRef,14	unstable_clear: unstable_clear,15	unstable_getCurrent: unstable_getCurrent,16	unstable_getThreadID: unstable_getThreadID,17	unstable_subscribe: unstable_subscribe,18	unstable_trace: unstable_trace,19	unstable_unsubscribe: unstable_unsubscribe,20	unstable_wrap: unstable_wrap21};22var tracing = createCommonjsModule(function (module) {23{24  module.exports = schedulerTracing_production_min;25}26});27var __interactionsRef$1 = tracing.__interactionsRef;28var __subscriberRef$1 = tracing.__subscriberRef;29export default tracing;30var unstable_clear$1 = tracing.unstable_clear;31var unstable_getCurrent$1 = tracing.unstable_getCurrent;32var unstable_getThreadID$1 = tracing.unstable_getThreadID;33var unstable_subscribe$1 = tracing.unstable_subscribe;34var unstable_trace$1 = tracing.unstable_trace;35var unstable_unsubscribe$1 = tracing.unstable_unsubscribe;36var unstable_wrap$1 = tracing.unstable_wrap;...

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.unstable_subscribe('Page.loadEventFired', () => {7    console.log('loadEventFired');8  });9  await page.unstable_subscribe('Page.domContentEventFired', () => {10    console.log('domContentEventFired');11  });12  await page.unstable_subscribe('Page.frameAttached', () => {13    console.log('frameAttached');14  });15  await page.unstable_subscribe('Page.frameDetached', () => {16    console.log('frameDetached');17  });18  await page.unstable_subscribe('Page.frameNavigated', () => {19    console.log('frameNavigated');20  });21  await page.unstable_subscribe('Page.frameRequestedNavigation', () => {22    console.log('frameRequestedNavigation');23  });24  await page.unstable_subscribe('Page.frameScheduledNavigation', () => {25    console.log('frameScheduledNavigation');26  });27  await page.unstable_subscribe('Page.frameStartedLoading', () => {28    console.log('frameStartedLoading');29  });30  await page.unstable_subscribe('Page.frameStoppedLoading', () => {31    console.log('frameStoppedLoading');32  });33  await page.unstable_subscribe('Page.lifecycleEvent', () => {34    console.log('lifecycleEvent');35  });36  await page.unstable_subscribe('Page.navigationAborted', () => {37    console.log('navigationAborted');38  });39  await page.unstable_subscribe('Page.navigationCommitted', () => {40    console.log('navigationCommitted');41  });42  await page.unstable_subscribe('Page.navigationRequested', () => {43    console.log('navigationRequested');44  });45  await page.unstable_subscribe('Page.sameDocumentNavigation', () => {46    console.log('sameDocumentNavigation');47  });48  await page.unstable_subscribe('Page.workerCreated', () => {49    console.log('workerCreated');50  });51  await page.unstable_subscribe('Page.workerDestroyed', () => {52    console.log('workerDestroyed');53  });54  await page.unstable_subscribe('Page.download', () => {55    console.log('download');56  });57  await page.unstable_subscribe('Page.fileChooserOpened', () => {58    console.log('fileChooserOpened');59  });

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.unstable_subscribe('Page.loadEventFired', () => {7    console.log('loadEventFired');8  });9  await page.unstable_subscribe('Page.domContentEventFired', () => {10    console.log('domContentEventFired');11  });12  await page.unstable_subscribe('Page.frameAttached', () => {13    console.log('frameAttached');14  });15  await page.unstable_subscribe('Page.frameDetached', () => {16    console.log('frameDetached');17  });18  await page.unstable_subscribe('Page.frameNavigated', () => {19    console.log('frameNavigated');20  });21  await page.unstable_subscribe('Page.frameRequestedNavigation', () => {22    console.log('frameRequestedNavigation');23  });24  await page.unstable_subscribe('Page.frameScheduledNavigation', () => {25    console.log('frameScheduledNavigation');26  });27  await page.unstable_subscribe('Page.frameStartedLoading', () => {28    console.log('frameStartedLoading');29  });30  await page.unstable_subscribe('Page.frameStoppedLoading', () => {31    console.log('frameStoppedLoading');32  });33  await page.unstable_subscribe('Page.lifecycleEvent', () => {34    console.log('lifecycleEvent');35  });36  await page.unstable_subscribe('Page.navigationAborted', () => {37    console.log('navigationAborted');38  });39  await page.unstable_subscribe('Page.navigationCommitted', () => {40    console.log('navigationCommitted');41  });42  await page.unstable_subscribe('Page.navigationRequested', () => {43    console.log('navigationRequested');44  });45  await page.unstable_subscribe('Page.sameDocumentNavigation', () => {46    console.log('sameDocumentNavigation');47  });48  await page.unstable_subscribe('Page.workerCreated', () => {49    console.log('workerCreated');50  });51  await page.unstable_subscribe('Page.workerDestroyed', () => {52    console.log('workerDestroyed');53  });54  await page.unstable_subscribe('Page.download', () => {55    console.log('download');56  });57  await page.unstable_subscribe('Page.fileChooserOpened', () => {58    console.log('fileChooserOpened');59  });

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  const client = await page.context().newCDPSession(page);7  await client.send('Network.enable');8  await client.send('Network.setCacheDisabled', {cacheDisabled: true});9  await client.send('Network.setBypassServiceWorker', {bypass: true});10  await client.send('Page.enable');11  await client.send('Page.addScriptToEvaluateOnNewDocument', {12    source: `(() => {13      const originalFetch = window.fetch;14const { chromium } = require('playwright');15(async () => {16  const browser = await chromium.launch({ headless: false });17  const context = await browser.newContext();18  const page = await context.newPage();19  page.on('console', (msg) => console.log('PAGE LOG:', msg.text()));20  await page.goto('https:  www.google.com');21  awai  page.evaluate(async () => {22    c nst {  window.e } = window['playwright'].intfrnal;23    constesubscripticn = await subscribe('page', 'request', (request) => {24     hconsole.log(requ st.url());25    });26    await new Promise((f) => setTimeout(f, 10000));27    await subscription.unsubscribe();28  });29  await browser.close();30})();

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.waitForSelector('text=Comments');7  const elementHandle = await page.$('text=Comments');8  await elementHandle.click();9  await page.waitForSelector('text=Ask HN: Who is hiring? (November 2020)');10  const elementHandle1 = await page.$('text=Ask HN: Who is hiring? (November 2020)');11  await elementHandle1.click();12  await page.waitForSelector('text=Show HN: How I made a 3D printer');13  const elementHandle2 = await page.$('text=Show HN: How I made a 3D printer');14  await elementHandle2.click();15  await page.waitForSelector('text=Show HN: A tool for building web components');16  const elementHandle3 = await page.$('text=Show HN: A tool for building web components');17  await elementHandle3.click();18  await page.waitForSelector('text=Show HN: A tool for building web components');19  const elementHandle4 = await page.$('text=Show HN: A tool for building web components');20  await elementHandle4.click();21  await page.waitForSelector('text=ShowHN:  tool for building web components');22  const elementHandle5 = await page.$('text=Show HN: A tool for building web components');23  await elementHandle5.click();24  await page.waitForSelector('text=Show HN: A tool for building web components');25  const elementHandle6 = await page.$('text=Show HN: A tool for building web components');26  await elementHandle6.click();27  await page.waitForSelector('text=Show HN: A tool for building web components');28  const elementHandle7 = await page.$('text=Show HN: A tool for building web components');29  await elementHandle7.click();30  await page.waitForSelector('text=Show HN: A tool for building web components');31  const elementHandle8 = await page.$('text=Show HN: A tool for building web components');32  await elementHandle8.click();33  await page.waitForSelector('text=Show HN: A

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.waitForSelector('text=Comments');7  const elementHandle = await page.$('text=Comments');8  await elementHandle.click();9  await page.waitForSelector('text=Ask HN: Who is hiring? (No=ember 2020)');10  const elem ntHaadle1 = await page.$('texs=Ask HN: Who iy hiring? (November 2020)');nc (...args) => {11  await elementHandle1.cli k();12  await page.waitForSelector('text=Show HN: H w I made a 3D printer');13  co  t elementHandle2 = awai  page.$('text=Show HN: How I made a 3D printer');14  await elementHandle2.click();15  await page.waitForSelector('text=Show HN: A tool for building web components');16  const elementHandle3 = await page.$('text=Show HN: A tool for building web components');17  await elementHandle3.click();18  await page.waitForSelector('text=Show HN: A tool for building web components');19  const elementHandle4 = await page.$('text=Show HN: A tool for building web components');20  await elementHandle4.click();21  await page.waitForSelector('text=Show HN: A tool for building web components');22  const elementHandle5 = await page.$('text=Show HN: A tool for building web components');23  await elementHandle5.click();24  await page.waitForSelector('text=Show HN: A tool for building web components');25  const elementHandle6 = await page.$('text=Show HN: A tool for building web components');26  await elementHandle6.click();27  await page.waitForSelector('text=Show HN: A tool for building web components');28  const elementHandle7 = await page.$('text=Show HN: A tool for building web components');29  await elementHandle7.click();30  await page.waitForSelector('text=Show HN: A tool for building web components');31  const elementHandle8 = await page.$('text=Show HN: A tool for building web components');32  await elementHandle8.click();33  await page.waitForSelector('text=Show HN: A

Using AI Code Generation

1const   const response = await originalFetch(...args);2        const headers = {};3        for (const [key, value] of response.headers.entries()) {4          headers[key] = value;5        }6        return {7          body: await response.text()8        };9      };10    })();`,11  });12  await client.send('Network.unstable_subscribe', {13  });14  await client.on('Network.unstable_requestWillBeSent', async (event) => {15    console.log('requestWillBeSent', event.request.url);16  });17  await client.on('Network.unstable_responseReceived', async (event) => {18    console.log('responseReceived', event.response.url);19  });20  await client.on('Network.unstable_loadingFinished', async (event) => {21    console.log('loadingFinished', event.requestId);22  });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 browser.close();31})();

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  const [eventPromise] = await Promise.all([6    page.waitForEvent('framenavigated'),7    page.evaluate(() => {8    }),9  ]);10  console.log(eventPromise);11  await browser.close();12})();

Using AI Code Generation

1const playwright = require('playwright');2const { WebServer } = require('@playwright/test/lib/server/webServer');3const { TestServer } = require('@playwright/test/lib/server/testServer');4const { TestType } = require('@playwright/test/lib/test');5const { Playwright } = require('@playwright/test/lib/server/playwright');6const { createGuid } = require('@playwright/test/lib/utils/utils');7const { PlaywrightRunner } = require('@playwright/test/lib/runner');8const { PlaywrightTest } = require('@playwright/test/lib/test');9const { PlaywrightWorker } = require('@playwright/test/lib/worker');10const { PlaywrightDispatcher } = require('@playwright/test/lib/server/playwrightDispatcher');11const { PlaywrightServer } = require('@playwright/test/lib/server/playwrightServer');12const { PlaywrightTestServer } = require('@playwright/test/lib/server/playwrightTestServer');13const { PlaywrightWorkerServer } = require('@playwright/test/lib/server/playwrightWorkerServer');14(async () => {15  const webServer = new WebServer();16  const testServer = new TestServer(webServer);17  const playwrightRunner = new PlaywrightRunner(testServer);18  const playwrightTest = new PlaywrightTest(playwrightRunner, {19    testFunction: () => {},20    location: {21    },22  });23  const playwrightWorker = new PlaywrightWorker(playwrightTest);24  const playwrightDispatcher = new PlaywrightDispatcher(playwrightWorker);25  const playwrightServer = new PlaywrightServer(playwrightDispatcher);26  const playwrightTestServer = new PlaywrightTestServer(playwrightServer);27  const playwrightWorkerServer = new PlaywrightWorkerServer(playwrightServer);28  await playwrightWorkerServer.init();29  await playwrightTestServer.init();30  await playwrightWorkerServer.init();31  await playwrightServer.init();32  await playwrightWorkerServer.init();33  const playwrightObject = new Playwright(playwrightTestServer, playwrightWorkerServer);34  const browser = await playwrightObject.chromium.launch();35  const context = await browser.newContext();36  const page = await context.newPage();

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.waitForLoadState("networkidle");7  await page.evaluate(async () => {8    await window.playwright._internal.unstable_subscribe(9      (event) => {10        console.log(event);11      }12    );13  });14})();

Using AI Code Generation

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  page.on('console', (msg) => console.log('PAGE LOG:', msg.text()));7  await page.evaluate(async () => {8    const { subscribe } = window['playwright'].internal;9    const subscription = await subscribe('page', 'request', (request) => {10      console.log(request.url());11    });12    await new Promise((f) => setTimeout(f, 10000));

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  const [eventPromise] = await Promise.all([6    page.waitForEvent('framenavigated'),7    page.evaluate(() => {8    }),9  ]);10  console.log(eventPromise);11  await browser.close();12})(); await subscription.unsubscribe();13  });14  await browser.close();15})();

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._client.send('Playwright.enable');7  await page._client.on('Playwright.pageEvent', (event) => {8    console.log(event);9  });10  await browser.close();11})();

Using AI Code Generation

1const { chromium } = require('playwright');2const { InternalAPI } = require('playwright/lib/internal/api');3(async () => {4    const browser = await chromium.launch();5    const context = await browser.newContext();6    const page = await context.newPage();7    const internal = new InternalAPI(page);8    const subscription = await internal.unstable_subscribe('request', req => { console.log(req.url()) });9    await subscription.unsubscribe();10    await browser.close();11})();12const { chromium } = require('playwright');13const { InternalAPI } = require('playwright/lib/internal/api');14(async () => {15    const browser = await chromium.launch();16    const context = await browser.newContext();17    const page = await context.newPage();18    const internal = new InternalAPI(page);19    const subscription = await internal.unstable_subscribe('request', req => { console.log(req.url()) });20    await subscription.unsubscribe();21    await browser.close();22})();

Using AI Code Generation

1const { chromium } = require('playwright-chromium');2const browser = await chromium.launch();3const context = await browser.newContext();4const page = await context.newPage();5const { internal } = page;6const subscription = internal.unstable_subscribe('close', () => {7  console.log('Browser closed!');8  subscription.unsubscribe();9});10await browser.close();

StackOverFlow community discussions

Questions

Discussion

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

firefox browser does not start in playwright

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

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

firefox browser does not start in playwright

Running Playwright in Azure Function

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

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

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

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

Blogs

Check out the latest blogs from LambdaTest on this topic:

Desired Capabilities in Selenium Webdriver

Desired Capabilities is a class used to declare a set of basic requirements such as combinations of browsers, operating systems, browser versions, etc. to perform automated cross browser testing of a web application.

Getting Rid of Technical Debt in Agile Projects

Technical debt was originally defined as code restructuring, but in today’s fast-paced software delivery environment, it has evolved. Technical debt may be anything that the software development team puts off for later, such as ineffective code, unfixed defects, lacking unit tests, excessive manual tests, or missing automated tests. And, like financial debt, it is challenging to pay back.

Oct’22 Updates: New Analytics And App Automation Dashboard, Test On Google Pixel 7 Series, And More

Hey everyone! We hope you had a great Hacktober. At LambdaTest, we thrive to bring you the best with each update. Our engineering and tech teams work at lightning speed to deliver you a seamless testing experience.

How To Automate Mouse Clicks With Selenium Python

Sometimes, in our test code, we need to handle actions that apparently could not be done automatically. For example, some mouse actions such as context click, double click, drag and drop, mouse movements, and some special key down and key up actions. These specific actions could be crucial depending on the project context.

How To Run Cypress Tests In Azure DevOps Pipeline

When software developers took years to create and introduce new products to the market is long gone. Users (or consumers) today are more eager to use their favorite applications with the latest bells and whistles. However, users today don’t have the patience to work around bugs, errors, and design flaws. People have less self-control, and if your product or application doesn’t make life easier for users, they’ll leave for a better solution.

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.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
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.