Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use createEventListenerWrapperWithPriority method in Playwright Internal

Best JavaScript code snippet using playwright-internal

DOMLegacyEventPluginSystem.js

Source:DOMLegacyEventPluginSystem.js

...385  eventSystemFlags: EventSystemFlags,386  capture: boolean,387): any => void {388  const rawEventName = getRawEventName(topLevelType);389  const listener = createEventListenerWrapperWithPriority(390    targetContainer,391    topLevelType,392    eventSystemFlags,393  );394  const unsubscribeListener = capture395    ? addEventCaptureListener(targetContainer, rawEventName, listener)396    : addEventBubbleListener(targetContainer, rawEventName, listener);397  return unsubscribeListener;398}399function getParent(inst: Object | null): Object | null {400  if (!inst) {401    return null;402  }403  do {...

env.js

Source:env.js

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

js-example.js

Source:js-example.js

1import type {DOMEventName} from './DOMEventNames';2import {3  type EventSystemFlags,4  SHOULD_NOT_DEFER_CLICK_FOR_FB_SUPPORT_MODE,5  IS_LEGACY_FB_SUPPORT_MODE,6  SHOULD_NOT_PROCESS_POLYFILL_EVENT_PLUGINS,7} from './EventSystemFlags';8import type {AnyNativeEvent} from './PluginModuleType';9import type {ReactSyntheticEvent} from './ReactSyntheticEventType';10import type {ElementListenerMapEntry} from '../client/ReactDOMComponentTree';11import type {EventPriority} from 'shared/ReactTypes';12import type {Fiber} from 'react-reconciler/src/ReactInternalTypes';13import {registrationNameDependencies} from './EventRegistry';14import {15  IS_CAPTURE_PHASE,16  IS_EVENT_HANDLE_NON_MANAGED_NODE,17  IS_NON_DELEGATED,18} from './EventSystemFlags';19import {20  HostRoot,21  HostPortal,22  HostComponent,23  HostText,24  ScopeComponent,25} from 'react-reconciler/src/ReactWorkTags';26import getEventTarget from './getEventTarget';27import {28  getClosestInstanceFromNode,29  getEventListenerMap,30  getEventHandlerListeners,31} from '../client/ReactDOMComponentTree';32import {COMMENT_NODE} from '../shared/HTMLNodeType';33import {batchedEventUpdates} from './ReactDOMUpdateBatching';34import getListener from './getListener';35import {passiveBrowserEventsSupported} from './checkPassiveEvents';36import {37  enableLegacyFBSupport,38  enableCreateEventHandleAPI,39  enableScopeAPI,40} from 'shared/ReactFeatureFlags';41import {42  invokeGuardedCallbackAndCatchFirstError,43  rethrowCaughtError,44} from 'shared/ReactErrorUtils';45import {createEventListenerWrapperWithPriority} from './ReactDOMEventListener';46import {47  removeEventListener,48  addEventCaptureListener,49  addEventBubbleListener,50  addEventBubbleListenerWithPassiveFlag,51  addEventCaptureListenerWithPassiveFlag,52} from './EventListener';53import {topLevelEventsToReactNames} from './DOMEventProperties';54import * as BeforeInputEventPlugin from './plugins/BeforeInputEventPlugin';55import * as ChangeEventPlugin from './plugins/ChangeEventPlugin';56import * as EnterLeaveEventPlugin from './plugins/EnterLeaveEventPlugin';57import * as SelectEventPlugin from './plugins/SelectEventPlugin';58import * as SimpleEventPlugin from './plugins/SimpleEventPlugin';59type DispatchListener = {|60  instance: null | Fiber,61  listener: Function,62  currentTarget: EventTarget,63|};64type DispatchEntry = {|65  event: ReactSyntheticEvent,66  listeners: Array<DispatchListener>,67|};68export type DispatchQueue = Array<DispatchEntry>;69// TODO: remove top-level side effect.70SimpleEventPlugin.registerEvents();71EnterLeaveEventPlugin.registerEvents();72ChangeEventPlugin.registerEvents();73SelectEventPlugin.registerEvents();74BeforeInputEventPlugin.registerEvents();75function extractEvents(76  dispatchQueue: DispatchQueue,77  domEventName: DOMEventName,78  targetInst: null | Fiber,79  nativeEvent: AnyNativeEvent,80  nativeEventTarget: null | EventTarget,81  eventSystemFlags: EventSystemFlags,82  targetContainer: EventTarget,83) {84  // TODO: we should remove the concept of a "SimpleEventPlugin".85  // This is the basic functionality of the event system. All86  // the other plugins are essentially polyfills. So the plugin87  // should probably be inlined somewhere and have its logic88  // be core the to event system. This would potentially allow89  // us to ship builds of React without the polyfilled plugins below.90  SimpleEventPlugin.extractEvents(91    dispatchQueue,92    domEventName,93    targetInst,94    nativeEvent,95    nativeEventTarget,96    eventSystemFlags,97    targetContainer,98  );99  const shouldProcessPolyfillPlugins =100    (eventSystemFlags & SHOULD_NOT_PROCESS_POLYFILL_EVENT_PLUGINS) === 0;101  // We don't process these events unless we are in the102  // event's native "bubble" phase, which means that we're103  // not in the capture phase. That's because we emulate104  // the capture phase here still. This is a trade-off,105  // because in an ideal world we would not emulate and use106  // the phases properly, like we do with the SimpleEvent107  // plugin. However, the plugins below either expect108  // emulation (EnterLeave) or use state localized to that109  // plugin (BeforeInput, Change, Select). The state in110  // these modules complicates things, as you'll essentially111  // get the case where the capture phase event might change112  // state, only for the following bubble event to come in113  // later and not trigger anything as the state now114  // invalidates the heuristics of the event plugin. We115  // could alter all these plugins to work in such ways, but116  // that might cause other unknown side-effects that we117  // can't forsee right now.118  if (shouldProcessPolyfillPlugins) {119    EnterLeaveEventPlugin.extractEvents(120      dispatchQueue,121      domEventName,122      targetInst,123      nativeEvent,124      nativeEventTarget,125      eventSystemFlags,126      targetContainer,127    );128    ChangeEventPlugin.extractEvents(129      dispatchQueue,130      domEventName,131      targetInst,132      nativeEvent,133      nativeEventTarget,134      eventSystemFlags,135      targetContainer,136    );137    SelectEventPlugin.extractEvents(138      dispatchQueue,139      domEventName,140      targetInst,141      nativeEvent,142      nativeEventTarget,143      eventSystemFlags,144      targetContainer,145    );146    BeforeInputEventPlugin.extractEvents(147      dispatchQueue,148      domEventName,149      targetInst,150      nativeEvent,151      nativeEventTarget,152      eventSystemFlags,153      targetContainer,154    );155  }...

DOMPluginEventSystem.js

Source:DOMPluginEventSystem.js

...51  domEventName,52  eventSystemFlags,53  isCapturePhaseListener54) => {55  const listener = createEventListenerWrapperWithPriority(56    targetContainer,57    domEventName,58    eventSystemFlags59  );60  let isPassiveListener;61  if (62    domEventName === 'touchstart' ||63    domEventName === 'touchmove' ||64    domEventName === 'wheel'65  ) {66    isPassiveListener = true;67  }68  if (isCapturePhaseListener) {69    if (isPassiveListener !== undefined) {...

ReactDOMEventListener.js

Source:ReactDOMEventListener.js

1import {2  DiscreteEvent,3  UserBlockingEvent,4  ContinuousEvent,5} from '../../../ReactTypes';6import { getEventPriorityForPluginSystem } from './DOMEventProperties';7let _enabled = true;8const setEnabled = (enabled) => {9  _enabled = !!enabled;10};11const isEnabled = () => _enabled;12const dispatchDiscreteEvent = (13  domEventName,14  eventSystemFlags,15  container,16  nativeEvent17) => {};18const dispatchUserBlockingUpdate = (19  domEventName,20  eventSystemFlags,21  container,22  nativeEvent23) => {};24const dispatchEvent = (25  domEventName,26  eventSystemFlags,27  container,28  nativeEvent29) => {};30const createEventListenerWrapperWithPriority = (31  targetContainer,32  domEventName,33  eventSystemFlags34) => {35  const eventPriority = getEventPriorityForPluginSystem(domEventName);36  let listenerWrapper;37  switch (eventPriority) {38    case DiscreteEvent:39      listenerWrapper = dispatchDiscreteEvent;40      break;41    case UserBlockingEvent:42      listenerWrapper = dispatchUserBlockingUpdate;43      break;44    case ContinuousEvent:45    default:46      listenerWrapper = dispatchEvent;47      break;48  }49  return listenerWrapper.bind(50    null,51    domEventName,52    eventSystemFlags,53    targetContainer54  );55};56export {57  _enabled,58  setEnabled,59  isEnabled,60  createEventListenerWrapperWithPriority,...

Using AI Code Generation

1const {createEventListenerWrapperWithPriority} = require('playwright/lib/client/eventDispatcher');2const {chromium} = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  const client = await page.context().newCDPSession(page);7  await client.send('Runtime.enable');8  const wrapper = createEventListenerWrapperWithPriority((event) => {9    console.log(event);10  }, 10);11  await client.send('Runtime.onConsoleAPICalled', {handler: wrapper});12  await page.evaluate(() => console.log('hello'));13  await browser.close();14})();15    at CDPSession._onMessage (/Users/rudraksh/Desktop/playwright/node_modules/playwright/lib/client/cjs/cjs.js:140:23)16    at CDPSession.emit (events.js:315:20)17    at CDPSession._onMessage (/Users/rudraksh/Desktop/playwright/node_modules/playwright/lib/client/cjs/cjs.js:140:23)18    at CDPSession.emit (events.js:315:20)19    at CDPSession._onMessage (/Users/rudraksh/Desktop/playwright/node_modules/playwright/lib/client/cjs/cjs.js:140:23)20    at CDPSession.emit (events.js:315:20)21    at CDPSession._onMessage (/Users/rudraksh/Desktop/playwright/node_modules/playwright/lib/client/cjs/cjs.js:140:23)22    at CDPSession.emit (events.js:315:20)23    at CDPSession._onMessage (/Users/rudraksh/Desktop/playwright/node_modules/playwright/lib/client/cjs/cjs.js:140:23)24    at CDPSession.emit (events.js:315:20)

Using AI Code Generation

1const { createEventListenerWrapperWithPriority } = require('playwright/lib/server/dom.js');2const { createServer } = require('http');3const { chromium } = require('playwright');4const server = createServer(async (req, res) => {5  const browser = await chromium.launch();6  const context = await browser.newContext();7  const page = await context.newPage();8  await page.setContent(`<html><body><div id="target"></div></body></html>`);9  const target = await page.$('#target');10  const wrapper = createEventListenerWrapperWithPriority('click', (event) => {11    console.log('event', event);12  }, 1);13  await target.evaluate((target, wrapper) => {14    target.addEventListener('click', wrapper);15  }, wrapper);16  await page.evaluate(() => {17    document.querySelector('#target').click();18  });19  await browser.close();20  res.end('ok');21});22server.listen(8000);23const { createEventListenerWrapperWithPriority } = require('playwright/lib/server/dom.js');24const { createServer } = require('http');25const { chromium } = require('playwright');26const server = createServer(async (req, res) => {27  const browser = await chromium.launch();28  const context = await browser.newContext();29  const page = await context.newPage();30  await page.setContent(`<html><body><div id="target"></div></body></html>`);31  const target = await page.$('#target');32  const wrapper = createEventListenerWrapperWithPriority('click', (event) => {33    console.log('event', event);34  }, 1);35  await target.evaluate((target, wrapper) => {36    target.addEventListener('click', wrapper);37  }, wrapper);38  await page.evaluate(() => {39    document.querySelector('#target').click();40  });41  await browser.close();42  res.end('ok');43});44server.listen(8000);

Using AI Code Generation

1const { createEventListenerWrapperWithPriority } = require('playwright-core/lib/server/injected/injectedScript');2const { createEventListenersWrapper } = require('playwright-core/lib/server/injected/injectedScript');3const { createEventListenerWrapper } = require('playwright-core/lib/server/injected/injectedScript');4const { createEventListenerWrapperWithModifier } = require('playwright-core/lib/server/injected/injectedScript');5const { createEventListenerWrapperWithModifierAndPriority } = require('playwright-core/lib/server/injected/injectedScript');6const { createEventListenerWrapperWithModifierAndStopImmediatePropagation } = require('playwright-core/lib/server/injected/injectedScript');7const { createEventListenerWrapperWithModifierAndStopImmediatePropagationAndPriority } = require('playwright-core/lib/server/injected/injectedScript');8const { createEventListenerWrapperWithStopImmediatePropagation } = require('playwright-core/lib/server/injected/injectedScript');9const { createEventListenerWrapperWithStopImmediatePropagationAndPriority } = require('playwright-core/lib/server/injected/injectedScript');10const { createEventListenersWrapperWithModifier } = require('playwright-core/lib/server/injected/injectedScript');11const { createEventListenersWrapperWithModifierAndPriority } = require('playwright-core/lib/server/injected/injectedScript');12const { createEventListenersWrapperWithModifierAndStopImmediatePropagation } = require('playwright-core/lib/server/injected/injectedScript');13const { createEventListenersWrapperWithModifierAndStopImmediatePropagationAndPriority } = require('playwright-core/lib/server/injected/injectedScript');14const { createEventListenersWrapperWithPriority } = require('playwright-core/lib/server/injected/injectedScript');15const { createEventListenersWrapperWithStopImmediatePropagation } = require('playwright-core/lib/server/injected/injectedScript');16const { createEventListenersWrapperWithStopImmediatePropagationAndPriority } = require('playwright-core/lib/server/injected/injectedScript');17const { createEventListenersWrapperWithModifierAndStopImmediatePropagationAndPriorityAndPassive } = require('playwright-core/lib/server/injected/injectedScript');18const { createEventListenerWrapperWithModifierAndStopImmediatePropagationAndPriorityAndPassive } = require('playwright-core/lib/server/injected/injectedScript');19const { createEventListenerWrapperWithModifierAndStopImmediatePropagationAndPassive } = require('playwright-core/lib/server/injected/injectedScript');20const { createEventListenerWrapperWithModifierAndPassive } = require

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch({ headless: false });4  const page = await browser.newPage();5  page._delegate.createEventListenerWrapperWithPriority('click', 1, (event) => {6    console.log(event);7  });8  page.frames()[0]._delegate.createEventListenerWrapperWithPriority('click', 1, (event) => {9    console.log(event);10  });11  await page.close();12  await browser.close();13})();

Using AI Code Generation

1const { createEventListenerWrapperWithPriority } = require('playwright/lib/server/dom.js');2const { createEventListenerWrapper } = require('playwright/lib/server/dom.js');3const eventListenerWrapper = createEventListenerWrapperWithPriority(1, (event, eventHandler) => {4  console.log('before event handler');5  eventHandler(event);6  console.log('after event handler');7});8const eventListenerWrapper2 = createEventListenerWrapper((event, eventHandler) => {9  console.log('before event handler');10  eventHandler(event);11  console.log('after event handler');12});13const event = {14  stopPropagation: () => {},15  preventDefault: () => {},16  target: {17    dispatchEvent: (event) => {18      console.log('dispatch event');19    },20  },21};22const eventHandler = () => {23  console.log('event handler');24};25eventListenerWrapper(event, eventHandler);26eventListenerWrapper2(event, eventHandler);27const { createEventListenerWrapperWithPriority } = require('playwright/lib/server/dom.js');28const { createEventListenerWrapper } = require('playwright/lib/server/dom.js');29const eventListenerWrapper = createEventListenerWrapperWithPriority(1, (event, eventHandler) => {30  console.log('before event handler');31  eventHandler(event);32  console.log('after event handler');33});34const eventListenerWrapper2 = createEventListenerWrapper((event, eventHandler) => {35  console.log('before event handler');36  eventHandler(event);37  console.log('after event handler');38});39const event = {40  stopPropagation: () => {},41  preventDefault: () => {},42  target: {43    dispatchEvent: (event) => {44      console.log('dispatch event');45    },46  },47};48const eventHandler = () => {49  console.log('event handler');50};51eventListenerWrapper(event, eventHandler);52eventListenerWrapper2(event, eventHandler);53const { createEventListenerWrapperWithPriority } =

Using AI Code Generation

1const { createEventListenerWrapperWithPriority } = require('playwright/lib/server/frames');2const { createEvent } = require('playwright/lib/server/frames');3const { createCustomEvent } = require('playwright/lib/server/frames');4const event = createEvent('click', { x: 100, y: 100 });5const customEvent = createCustomEvent('myCustomEvent', { someData: 'someValue' });6const wrapper = createEventListenerWrapperWithPriority(event, customEvent, 1);7console.log(wrapper);

Using AI Code Generation

1const { createEventListenerWrapperWithPriority } = require('playwright/lib/utils/eventListeners');2const { EventEmitter } = require('events');3const eventEmitter = new EventEmitter();4const listener = (event) => {5    console.log(`Event: ${event}`);6};7const wrapper = createEventListenerWrapperWithPriority(eventEmitter, 'foo', listener, 1);8eventEmitter.on('foo', wrapper);9eventEmitter.emit('foo', 'bar');10const { createEventListenerWrapperWithPriority } = require('puppeteer/lib/EventEmitter');11const { EventEmitter } = require('events');12const eventEmitter = new EventEmitter();13const listener = (event) => {14    console.log(`Event: ${event}`);15};16const wrapper = createEventListenerWrapperWithPriority(eventEmitter, 'foo', listener, 1);17eventEmitter.on('foo', wrapper);18eventEmitter.emit('foo', 'bar');19const { createEventListenerWrapperWithPriority } = require('puppeteer/lib/EventEmitter');20const { EventEmitter } = require('events');21const eventEmitter = new EventEmitter();22const listener = (event) => {23    console.log(`Event: ${event}`);24};25const wrapper = createEventListenerWrapperWithPriority(eventEmitter, 'foo', listener, 1);26eventEmitter.on('foo', wrapper);27eventEmitter.emit('foo', 'bar');28const { createEventListenerWrapperWithPriority } = require('puppeteer/lib/EventEmitter');29const { EventEmitter } = require('events');30const eventEmitter = new EventEmitter();31const listener = (event) => {32    console.log(`Event: ${event}`);33};34const wrapper = createEventListenerWrapperWithPriority(eventEmitter, 'foo', listener, 1);35eventEmitter.on('foo', wrapper);36eventEmitter.emit('foo', 'bar');37const { createEventListenerWrapperWithPriority } = require('p

Using AI Code Generation

1const { createEventListenerWrapperWithPriority } = require('@playwright/test/lib/server/events');2const { EventListenerWrapper } = require('@playwright/test/lib/server/events');3const { EventDispatcher } = require('@playwright/test/lib/server/events');4const { EventEmitter } = require('events');5const wrapper = createEventListenerWrapperWithPriority('click', (event) => {6    console.log('click event listener');7    console.log(event);8});9const dispatcher = new EventDispatcher(new EventEmitter());10dispatcher.add(wrapper);11const emitter = new EventEmitter();12emitter.on('click', (event) => {13    console.log('click event emitter');14    console.log(event);15});16dispatcher.dispatch('click', emitter, { x: 100, y: 200 });

Using AI Code Generation

1const wrapper = createEventListenerWrapperWithPriority("click", "mouse", 100);2await page.exposeBinding("wrapper", wrapper);3await page.evaluate(async () => {4  const wrapper = window.wrapper;5  document.body.addEventListener("click", wrapper, true);6});7await page.click("button");

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.