Discover AI-native insights at Testμ Conference‘25

How to use _removeInitScripts method in Playwright Internal

Best JavaScript code snippet using playwright-internal

page.js

...404    await this._channel.addInitScript({405      source406    });407  }408  async _removeInitScripts() {409    await this._channel.removeInitScripts();410  }411  async route(url, handler, options = {}) {412    this._routes.unshift(new _network.RouteHandler(this._browserContext._options.baseURL, url, handler, options.times));413    if (this._routes.length === 1) await this._channel.setNetworkInterceptionEnabled({414      enabled: true415    });416  }417  async unroute(url, handler) {418    this._routes = this._routes.filter(route => route.url !== url || handler && route.handler !== handler);419    if (!this._routes.length) await this._disableInterception();420  }421  async _unrouteAll() {422    this._routes = [];423    await this._disableInterception();424  }425  async _disableInterception() {426    await this._channel.setNetworkInterceptionEnabled({427      enabled: false428    });429  }430  async screenshot(options = {}) {431    const copy = { ...options,432      mask: undefined433    };434    if (!copy.type) copy.type = (0, _elementHandle.determineScreenshotType)(options);435    if (options.mask) {436      copy.mask = options.mask.map(locator => ({437        frame: locator._frame._channel,438        selector: locator._selector439      }));440    }441    copy.fonts = options._fonts;442    const result = await this._channel.screenshot(copy);443    const buffer = _buffer.Buffer.from(result.binary, 'base64');444    if (options.path) {445      await (0, _fileUtils.mkdirIfNeeded)(options.path);446      await _fs.default.promises.writeFile(options.path, buffer);447    }448    return buffer;449  }450  async _expectScreenshot(customStackTrace, options) {451    return this._wrapApiCall(async () => {452      var _options$screenshotOp, _options$screenshotOp2;453      const mask = (_options$screenshotOp = options.screenshotOptions) !== null && _options$screenshotOp !== void 0 && _options$screenshotOp.mask ? (_options$screenshotOp2 = options.screenshotOptions) === null || _options$screenshotOp2 === void 0 ? void 0 : _options$screenshotOp2.mask.map(locator => ({454        frame: locator._frame._channel,455        selector: locator._selector456      })) : undefined;457      const locator = options.locator ? {458        frame: options.locator._frame._channel,459        selector: options.locator._selector460      } : undefined;461      const expected = options.expected ? options.expected.toString('base64') : undefined;462      const result = await this._channel.expectScreenshot({ ...options,463        isNot: !!options.isNot,464        expected,465        locator,466        screenshotOptions: { ...options.screenshotOptions,467          mask468        }469      });470      return {471        log: result.log,472        actual: result.actual ? _buffer.Buffer.from(result.actual, 'base64') : undefined,473        previous: result.previous ? _buffer.Buffer.from(result.previous, 'base64') : undefined,474        diff: result.diff ? _buffer.Buffer.from(result.diff, 'base64') : undefined,475        errorMessage: result.errorMessage476      };477    }, false478    /* isInternal */479    , customStackTrace);480  }481  async title() {482    return this._mainFrame.title();483  }484  async bringToFront() {485    await this._channel.bringToFront();486  }487  async close(options = {488    runBeforeUnload: undefined489  }) {490    try {491      if (this._ownedContext) await this._ownedContext.close();else await this._channel.close(options);492    } catch (e) {493      if ((0, _errors.isSafeCloseError)(e)) return;494      throw e;495    }496  }497  isClosed() {498    return this._closed;499  }500  async click(selector, options) {501    return this._mainFrame.click(selector, options);502  }503  async dragAndDrop(source, target, options) {504    return this._mainFrame.dragAndDrop(source, target, options);505  }506  async dblclick(selector, options) {507    return this._mainFrame.dblclick(selector, options);508  }509  async tap(selector, options) {510    return this._mainFrame.tap(selector, options);511  }512  async fill(selector, value, options) {513    return this._mainFrame.fill(selector, value, options);514  }515  locator(selector, options) {516    return this.mainFrame().locator(selector, options);517  }518  frameLocator(selector) {519    return this.mainFrame().frameLocator(selector);520  }521  async focus(selector, options) {522    return this._mainFrame.focus(selector, options);523  }524  async textContent(selector, options) {525    return this._mainFrame.textContent(selector, options);526  }527  async innerText(selector, options) {528    return this._mainFrame.innerText(selector, options);529  }530  async innerHTML(selector, options) {531    return this._mainFrame.innerHTML(selector, options);532  }533  async getAttribute(selector, name, options) {534    return this._mainFrame.getAttribute(selector, name, options);535  }536  async inputValue(selector, options) {537    return this._mainFrame.inputValue(selector, options);538  }539  async isChecked(selector, options) {540    return this._mainFrame.isChecked(selector, options);541  }542  async isDisabled(selector, options) {543    return this._mainFrame.isDisabled(selector, options);544  }545  async isEditable(selector, options) {546    return this._mainFrame.isEditable(selector, options);547  }548  async isEnabled(selector, options) {549    return this._mainFrame.isEnabled(selector, options);550  }551  async isHidden(selector, options) {552    return this._mainFrame.isHidden(selector, options);553  }554  async isVisible(selector, options) {555    return this._mainFrame.isVisible(selector, options);556  }557  async hover(selector, options) {558    return this._mainFrame.hover(selector, options);559  }560  async selectOption(selector, values, options) {561    return this._mainFrame.selectOption(selector, values, options);562  }563  async setInputFiles(selector, files, options) {564    return this._mainFrame.setInputFiles(selector, files, options);565  }566  async type(selector, text, options) {567    return this._mainFrame.type(selector, text, options);568  }569  async press(selector, key, options) {570    return this._mainFrame.press(selector, key, options);571  }572  async check(selector, options) {573    return this._mainFrame.check(selector, options);574  }575  async uncheck(selector, options) {576    return this._mainFrame.uncheck(selector, options);577  }578  async setChecked(selector, checked, options) {579    return this._mainFrame.setChecked(selector, checked, options);580  }581  async waitForTimeout(timeout) {582    return this._mainFrame.waitForTimeout(timeout);583  }584  async waitForFunction(pageFunction, arg, options) {585    return this._mainFrame.waitForFunction(pageFunction, arg, options);586  }587  workers() {588    return [...this._workers];589  }590  on(event, listener) {591    if (event === _events.Events.Page.FileChooser && !this.listenerCount(event)) this._channel.setFileChooserInterceptedNoReply({592      intercepted: true593    });594    super.on(event, listener);595    return this;596  }597  addListener(event, listener) {598    if (event === _events.Events.Page.FileChooser && !this.listenerCount(event)) this._channel.setFileChooserInterceptedNoReply({599      intercepted: true600    });601    super.addListener(event, listener);602    return this;603  }604  off(event, listener) {605    super.off(event, listener);606    if (event === _events.Events.Page.FileChooser && !this.listenerCount(event)) this._channel.setFileChooserInterceptedNoReply({607      intercepted: false608    });609    return this;610  }611  removeListener(event, listener) {612    super.removeListener(event, listener);613    if (event === _events.Events.Page.FileChooser && !this.listenerCount(event)) this._channel.setFileChooserInterceptedNoReply({614      intercepted: false615    });616    return this;617  }618  async pause() {619    if (!require('inspector').url()) await this.context()._channel.pause();620  }621  async pdf(options = {}) {622    const transportOptions = { ...options623    };624    if (transportOptions.margin) transportOptions.margin = { ...transportOptions.margin625    };626    if (typeof options.width === 'number') transportOptions.width = options.width + 'px';627    if (typeof options.height === 'number') transportOptions.height = options.height + 'px';628    for (const margin of ['top', 'right', 'bottom', 'left']) {629      const index = margin;630      if (options.margin && typeof options.margin[index] === 'number') transportOptions.margin[index] = transportOptions.margin[index] + 'px';631    }632    const result = await this._channel.pdf(transportOptions);633    const buffer = _buffer.Buffer.from(result.pdf, 'base64');634    if (options.path) {635      await _fs.default.promises.mkdir(_path.default.dirname(options.path), {636        recursive: true637      });638      await _fs.default.promises.writeFile(options.path, buffer);639    }640    return buffer;641  }642  async _resetForReuse() {643    await this._unrouteAll();644    await this._removeInitScripts();645    await this._removeExposedBindings();646  }647}648exports.Page = Page;649class BindingCall extends _channelOwner.ChannelOwner {650  static from(channel) {651    return channel._object;652  }653  constructor(parent, type, guid, initializer) {654    super(parent, type, guid, initializer);655  }656  async call(func) {657    try {658      const frame = _frame.Frame.from(this._initializer.frame);...

browserContext.js

Source: browserContext.js

...246    await this._channel.addInitScript({247      source248    });249  }250  async _removeInitScripts() {251    await this._channel.removeInitScripts();252  }253  async exposeBinding(name, callback, options = {}) {254    await this._channel.exposeBinding({255      name,256      needsHandle: options.handle257    });258    this._bindings.set(name, callback);259  }260  async _removeExposedBindings() {261    this._bindings.clear();262    await this._channel.removeExposedBindings();263  }264  async exposeFunction(name, callback) {265    await this._channel.exposeBinding({266      name267    });268    const binding = (source, ...args) => callback(...args);269    this._bindings.set(name, binding);270  }271  async route(url, handler, options = {}) {272    this._routes.unshift(new network.RouteHandler(this._options.baseURL, url, handler, options.times));273    if (this._routes.length === 1) await this._channel.setNetworkInterceptionEnabled({274      enabled: true275    });276  }277  async unroute(url, handler) {278    this._routes = this._routes.filter(route => route.url !== url || handler && route.handler !== handler);279    if (!this._routes.length) await this._disableInterception();280  }281  async _unrouteAll() {282    this._routes = [];283    await this._disableInterception();284  }285  async _disableInterception() {286    await this._channel.setNetworkInterceptionEnabled({287      enabled: false288    });289  }290  async waitForEvent(event, optionsOrPredicate = {}) {291    return this._wrapApiCall(async () => {292      const timeout = this._timeoutSettings.timeout(typeof optionsOrPredicate === 'function' ? {} : optionsOrPredicate);293      const predicate = typeof optionsOrPredicate === 'function' ? optionsOrPredicate : optionsOrPredicate.predicate;294      const waiter = _waiter.Waiter.createForEvent(this, event);295      waiter.rejectOnTimeout(timeout, `Timeout ${timeout}ms exceeded while waiting for event "${event}"`);296      if (event !== _events.Events.BrowserContext.Close) waiter.rejectOnEvent(this, _events.Events.BrowserContext.Close, new Error('Context closed'));297      const result = await waiter.waitForEvent(this, event, predicate);298      waiter.dispose();299      return result;300    });301  }302  async storageState(options = {}) {303    const state = await this._channel.storageState();304    if (options.path) {305      await (0, _fileUtils.mkdirIfNeeded)(options.path);306      await _fs.default.promises.writeFile(options.path, JSON.stringify(state, undefined, 2), 'utf8');307    }308    return state;309  }310  backgroundPages() {311    return [...this._backgroundPages];312  }313  serviceWorkers() {314    return [...this._serviceWorkers];315  }316  async newCDPSession(page) {317    // channelOwner.ts's validation messages don't handle the pseudo-union type, so we're explicit here318    if (!(page instanceof _page.Page) && !(page instanceof _frame.Frame)) throw new Error('page: expected Page or Frame');319    const result = await this._channel.newCDPSession(page instanceof _page.Page ? {320      page: page._channel321    } : {322      frame: page._channel323    });324    return _cdpSession.CDPSession.from(result.session);325  }326  _onClose() {327    var _this$_browserType, _this$_browserType$_c;328    if (this._browser) this._browser._contexts.delete(this);329    (_this$_browserType = this._browserType) === null || _this$_browserType === void 0 ? void 0 : (_this$_browserType$_c = _this$_browserType._contexts) === null || _this$_browserType$_c === void 0 ? void 0 : _this$_browserType$_c.delete(this);330    this.emit(_events.Events.BrowserContext.Close, this);331  }332  async close() {333    try {334      await this._wrapApiCall(async () => {335        var _this$_browserType2, _this$_browserType2$_;336        await ((_this$_browserType2 = this._browserType) === null || _this$_browserType2 === void 0 ? void 0 : (_this$_browserType2$_ = _this$_browserType2._onWillCloseContext) === null || _this$_browserType2$_ === void 0 ? void 0 : _this$_browserType2$_.call(_this$_browserType2, this));337        if (this._options.recordHar) {338          const har = await this._channel.harExport();339          const artifact = _artifact.Artifact.from(har.artifact);340          await artifact.saveAs(this._options.recordHar.path);341          await artifact.delete();342        }343      }, true);344      await this._channel.close();345      await this._closedPromise;346    } catch (e) {347      if ((0, _errors.isSafeCloseError)(e)) return;348      throw e;349    }350  }351  async _enableRecorder(params) {352    await this._channel.recorderSupplementEnable(params);353  }354  async _resetForReuse() {355    await this._unrouteAll();356    await this._removeInitScripts();357    await this._removeExposedBindings();358  }359}360exports.BrowserContext = BrowserContext;361async function prepareStorageState(options) {362  if (typeof options.storageState !== 'string') return options.storageState;363  try {364    return JSON.parse(await _fs.default.promises.readFile(options.storageState, 'utf8'));365  } catch (e) {366    (0, _stackTrace.rewriteErrorMessage)(e, `Error reading storage state from ${options.storageState}:\n` + e.message);367    throw e;368  }369}370async function prepareBrowserContextParams(options) {...

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3  await playwright._removeInitScripts();4  const browser = await playwright.chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  await browser.close();8})();

Using AI Code Generation

1const { Playwright } = require('playwright');2Playwright._removeInitScripts();3const { Playwright } = require('playwright');4Playwright._removeInitScripts();5const { Playwright } = require('playwright');6Playwright._removeInitScripts();7const { Playwright } = require('playwright');8Playwright._removeInitScripts();9const { Playwright } = require('playwright');10Playwright._removeInitScripts();11const { Playwright } = require('playwright');12Playwright._removeInitScripts();13const { Playwright } = require('playwright');14Playwright._removeInitScripts();15const { Playwright } = require('playwright');16Playwright._removeInitScripts();17const { Playwright } = require('playwright');18Playwright._removeInitScripts();19const { Playwright } = require('playwright');20Playwright._removeInitScripts();21const { Playwright } = require('playwright');22Playwright._removeInitScripts();23const { Playwright } = require('playwright');24Playwright._removeInitScripts();25const { Playwright } = require('playwright');26Playwright._removeInitScripts();27const { Playwright } = require('playwright');28Playwright._removeInitScripts();29const { Playwright } = require('

Using AI Code Generation

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

Using AI Code Generation

1const { _removeInitScripts } = require('playwright/lib/server/browserType');2const { _initScript } = require('playwright/lib/server/browserType');3const { _initScript } = require('playwright/lib/server/browserType');4const { _initScript } = require('playwright/lib/server/browserType');5const { _initScript } = require('playwright/lib/server/browserType');6const { _initScript } = require('playwright/lib/server/browserType');7const { _initScript } = require('playwright/lib/server/browserType');8const { _initScript } = require('playwright/lib/server/browserType');9const { _initScript } = require('playwright/lib/server/browserType');10const { _initScript } = require('playwright/lib/server/browserType');11const { _initScript } = require('playwright/lib/server/browserType');12const { _initScript } = require('playwright/lib/server/browserType');13const { _initScript } = require('playwright/lib/server/browserType');14const { _initScript } = require('playwright/lib/server/browserType');15const { _initScript } = require('playwright/lib/server/browserType');16const { _initScript } = require('playwright/lib/server/browserType');17const { _initScript } = require('playwright/lib/server/browserType');

Using AI Code Generation

1const {chromium} = require('playwright');2const { _removeInitScripts } = require('playwright-core/lib/server/browserContext');3(async () => {4    const browser = await chromium.launch()5    const context = await browser.newContext({6        userAgent: 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36',7        viewport: { width: 1280, height: 800 }8    });9    _removeInitScripts(context);10    const page = await context.newPage();11    await page.screenshot({ path: 'example.png' });12    await browser.close();13})();14const { chromium } = require('playwright');15const { _removeInitScripts } = require('playwright-core/lib/server/browserContext');16(async () => {17    const browser = await chromium.launch()18    const context = await browser.newContext({19        userAgent: 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36',20        viewport: { width: 1280, height: 800 }21    });22    _removeInitScripts(context);23    const page = await context.newPage();24    await page.screenshot({ path: 'example.png' });25    await browser.close();26})();27const { chromium } = require('playwright');28const { _removeInitScripts } = require('playwright-core/lib/server/browserContext');29(async () => {30    const browser = await chromium.launch()31    const context = await browser.newContext({32        userAgent: 'Mozilla/5.0 (

Using AI Code Generation

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

Using AI Code Generation

1const playwright = require('playwright');2const { Internal } = require('playwright/lib/server/browserType');3Internal.prototype._removeInitScripts = function () {4};5(async () => {6  const browser = await playwright.chromium.launch();7  const page = await browser.newPage();8  await page.screenshot({ path: 'example.png' });9  await browser.close();10})();

StackOverFlow community discussions

Questions

Discussion

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

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

Running Playwright in Azure Function

firefox browser does not start in playwright

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

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

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

Blogs

Check out the latest blogs from LambdaTest on this topic:

An Interactive Guide To CSS Hover Effects

Building a website is all about keeping the user experience in mind. Ultimately, it’s about providing visitors with a mind-blowing experience so they’ll keep coming back. One way to ensure visitors have a great time on your site is to add some eye-catching text or image animations.

A Complete Guide To CSS Houdini

As a developer, checking the cross browser compatibility of your CSS properties is of utmost importance when building your website. I have often found myself excited to use a CSS feature only to discover that it’s still not supported on all browsers. Even if it is supported, the feature might be experimental and not work consistently across all browsers. Ask any front-end developer about using a CSS feature whose support is still in the experimental phase in most prominent web browsers. ????

How To Test React Native Apps On iOS And Android

As everyone knows, the mobile industry has taken over the world and is the fastest emerging industry in terms of technology and business. It is possible to do all the tasks using a mobile phone, for which earlier we had to use a computer. According to Statista, in 2021, smartphone vendors sold around 1.43 billion smartphones worldwide. The smartphone penetration rate has been continuously rising, reaching 78.05 percent in 2020. By 2025, it is expected that almost 87 percent of all mobile users in the United States will own a smartphone.

Do you possess the necessary characteristics to adopt an Agile testing mindset?

To understand the agile testing mindset, we first need to determine what makes a team “agile.” To me, an agile team continually focuses on becoming self-organized and cross-functional to be able to complete any challenge they may face during a project.

Best Mobile App Testing Framework for Android and iOS Applications

This article is a part of our Content Hub. For more in-depth resources, check out our content hub on Mobile App Testing Tutorial.

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.