How to use attemptToDispatchEvent method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactDOMEventReplaying.js

Source: ReactDOMEventReplaying.js Github

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...453 }454 const targetContainers = queuedEvent.targetContainers;455 while (targetContainers.length > 0) {456 const targetContainer = targetContainers[0];457 const nextBlockedOn = attemptToDispatchEvent(458 queuedEvent.domEventName,459 queuedEvent.eventSystemFlags,460 targetContainer,461 queuedEvent.nativeEvent,462 );463 if (nextBlockedOn !== null) {464 /​/​ We're still blocked. Try again later.465 const fiber = getInstanceFromNode(nextBlockedOn);466 if (fiber !== null) {467 attemptContinuousHydration(fiber);468 }469 queuedEvent.blockedOn = nextBlockedOn;470 return false;471 }472 /​/​ This target container was successfully dispatched. Try the next.473 targetContainers.shift();474 }475 return true;476}477function attemptReplayContinuousQueuedEventInMap(478 queuedEvent ,479 key ,480 map ,481) {482 if (attemptReplayContinuousQueuedEvent(queuedEvent)) {483 map.delete(key);484 }485}486function replayUnblockedEvents() {487 hasScheduledReplayAttempt = false;488 /​/​ First replay discrete events.489 while (queuedDiscreteEvents.length > 0) {490 const nextDiscreteEvent = queuedDiscreteEvents[0];491 if (nextDiscreteEvent.blockedOn !== null) {492 /​/​ We're still blocked.493 /​/​ Increase the priority of this boundary to unblock494 /​/​ the next discrete event.495 const fiber = getInstanceFromNode(nextDiscreteEvent.blockedOn);496 if (fiber !== null) {497 attemptUserBlockingHydration(fiber);498 }499 break;500 }501 const targetContainers = nextDiscreteEvent.targetContainers;502 while (targetContainers.length > 0) {503 const targetContainer = targetContainers[0];504 const nextBlockedOn = attemptToDispatchEvent(505 nextDiscreteEvent.domEventName,506 nextDiscreteEvent.eventSystemFlags,507 targetContainer,508 nextDiscreteEvent.nativeEvent,509 );510 if (nextBlockedOn !== null) {511 /​/​ We're still blocked. Try again later.512 nextDiscreteEvent.blockedOn = nextBlockedOn;513 break;514 }515 /​/​ This target container was successfully dispatched. Try the next.516 targetContainers.shift();517 }518 if (nextDiscreteEvent.blockedOn === null) {...

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ReactDOMEventListener.js

Source: ReactDOMEventListener.js Github

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...61 queueDiscreteEvent(null, /​/​ Flags that we're not actually blocked on anything as far as we know.62 domEventName, eventSystemFlags, targetContainer, nativeEvent);63 return;64 }65 var blockedOn = attemptToDispatchEvent(domEventName, eventSystemFlags, targetContainer, nativeEvent);66 if (blockedOn === null) {67 /​/​ We successfully dispatched this event.68 if (allowReplay) {69 clearIfContinuousEvent(domEventName, nativeEvent);70 }71 return;72 }73 if (allowReplay) {74 if (isReplayableDiscreteEvent(domEventName)) {75 /​/​ This this to be replayed later once the target is available.76 queueDiscreteEvent(blockedOn, domEventName, eventSystemFlags, targetContainer, nativeEvent);77 return;78 }79 if (queueIfContinuousEvent(blockedOn, domEventName, eventSystemFlags, targetContainer, nativeEvent)) {80 return;81 } /​/​ We need to clear only if we didn't queue because82 /​/​ queueing is accummulative.83 clearIfContinuousEvent(domEventName, nativeEvent);84 } /​/​ This is not replayable so we'll invoke it but without a target,85 /​/​ in case the event system needs to trace it.86 dispatchEventForPluginEventSystem(domEventName, eventSystemFlags, nativeEvent, null, targetContainer);87 } /​/​ Attempt dispatching an event. Returns a SuspenseInstance or Container if it's blocked.88 function attemptToDispatchEvent(domEventName, eventSystemFlags, targetContainer, nativeEvent) {89 /​/​ TODO: Warn if _enabled is false.90 var nativeEventTarget = getEventTarget(nativeEvent);91 var targetInst = getClosestInstanceFromNode(nativeEventTarget);92 if (targetInst !== null) {93 var nearestMounted = getNearestMountedFiber(targetInst);94 if (nearestMounted === null) {95 /​/​ This tree has been unmounted already. Dispatch without a target.96 targetInst = null;97 } else {98 var tag = nearestMounted.tag;99 if (tag === SuspenseComponent) {100 var instance = getSuspenseInstanceFromFiber(nearestMounted);101 if (instance !== null) {102 /​/​ Queue the event to be replayed later. Abort dispatching since we...

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Using AI Code Generation

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1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch({ headless: false });4 const page = await browser.newPage();5 await page.evaluate(() => {6 window.attemptToDispatchEvent = (element, type, eventInit) => {7 const event = new Event(type, eventInit);8 return element.dispatchEvent(event);9 };10 });11 await page.evaluate(() => {12 const element = document.querySelector('[name="q"]');13 attemptToDispatchEvent(element, 'focus', { bubbles: true });14 attemptToDispatchEvent(element, 'focusin', { bubbles: true });15 });16 await page.waitForTimeout(3000);17 await browser.close();18})();19const { chromium } = require('playwright');20(async () => {21 const browser = await chromium.launch({ headless: false });22 const page = await browser.newPage();23 await page.evaluate(() => {24 window.attemptToDispatchEvent = (element, type, eventInit) => {25 const event = new Event(type, eventInit);26 return element.dispatchEvent(event);27 };28 });29 await page.evaluate(() => {30 const element = document.querySelector('[name="q"]');31 attemptToDispatchEvent(element, 'focus', { bubbles: true });32 attemptToDispatchEvent(element, 'focusin', { bubbles: true });33 });34 await page.waitForTimeout(3000);35 await browser.close();36})();37const { chromium } = require('playwright');38(async () => {39 const browser = await chromium.launch({ headless: false });40 const page = await browser.newPage();41 await page.evaluate(() => {

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Using AI Code Generation

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1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch();4 const page = await browser.newPage();5 await page.waitForSelector('input[name="q"]');6 await page._delegate._page.attemptToDispatchEvent('keydown', {7 modifiers: {8 },9 });10 await page._delegate._page.attemptToDispatchEvent('keypress', {11 modifiers: {12 },13 });14 await page._delegate._page.attemptToDispatchEvent('keyup', {15 modifiers: {16 },17 });18 await browser.close();19})();

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Using AI Code Generation

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1const { Playwright } = require('playwright/​lib/​server/​playwright');2const playwright = new Playwright();3const { BrowserServer } = require('playwright/​lib/​server/​browserServer');4const { BrowserContext } = require('playwright/​lib/​server/​browserContext');5const { Page } = require('playwright/​lib/​server/​page');6const browserServer = await playwright.chromium.launchServer({ headless: false });7const wsEndpoint = browserServer.wsEndpoint();8const context = await BrowserContext.create(browserServer, {}, wsEndpoint);9const page = await Page.create(context, {});10await page.evaluate(() => {11 document.addEventListener('click', () => console.log('clicked!'));12});13await page.attemptToDispatchEvent('click', { x: 100, y: 100 });14await browserServer.close();15await playwright.stop();

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Using AI Code Generation

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1const {InternalDispatcher} = require('playwright/​lib/​internal/​dispatcher');2const {DispatcherConnection} = require('playwright/​lib/​internal/​dispatchers/​dispatcher');3const dispatcherConnection = new DispatcherConnection();4const internalDispatcher = new InternalDispatcher(dispatcherConnection);5const event = {type: 'myEvent', data: 'hello'};6await internalDispatcher.attemptToDispatchEvent(event);7const {InternalDispatcher} = require('playwright/​lib/​internal/​dispatcher');8const {DispatcherConnection} = require('playwright/​lib/​internal/​dispatchers/​dispatcher');9const dispatcherConnection = new DispatcherConnection();10const internalDispatcher = new InternalDispatcher(dispatcherConnection);11const event = {type: 'myEvent', data: 'hello'};12await internalDispatcher.attemptToDispatchEvent(event);13const {InternalDispatcher} = require('playwright/​lib/​internal/​dispatcher');14const {DispatcherConnection} = require('playwright/​lib/​internal/​dispatchers/​dispatcher');15const dispatcherConnection = new DispatcherConnection();16const internalDispatcher = new InternalDispatcher(dispatcherConnection);17const event = {type: 'myEvent', data: 'hello'};18await internalDispatcher.attemptToDispatchEvent(event);19const {InternalDispatcher} = require('playwright/​lib/​internal/​dispatcher');20const {DispatcherConnection} = require('playwright/​lib/​internal/​dispatchers/​dispatcher');21const dispatcherConnection = new DispatcherConnection();22const internalDispatcher = new InternalDispatcher(dispatcherConnection);23const event = {type: 'myEvent', data: 'hello'};24await internalDispatcher.attemptToDispatchEvent(event);25const {InternalDispatcher} = require('playwright/​lib/​internal/​dispatcher');26const {DispatcherConnection} = require('playwright/​lib/​internal/​dispatchers/​dispatcher');27const dispatcherConnection = new DispatcherConnection();28const internalDispatcher = new InternalDispatcher(dispatcherConnection);29const event = {type: 'myEvent', data: 'hello'};30await internalDispatcher.attemptToDispatchEvent(event);31const {InternalDispatcher} = require('playwright/​lib/​internal/​dispatcher');32const {DispatcherConnection} = require('playwright/​lib

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Using AI Code Generation

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1const { _electron } = require('playwright');2const { app } = require('electron');3const path = require('path');4const { BrowserWindow } = require('electron');5const { ipcMain } = require('electron');6app.on('ready', async () => {7 const mainWindow = new BrowserWindow({8 webPreferences: {9 preload: path.join(__dirname, 'preload.js'),10 },11 });12 await mainWindow.loadFile('index.html');13 mainWindow.webContents.openDevTools();14 ipcMain.on('dispatch-event', async (event, arg) => {15 const { type, options } = arg;16 const { webContents } = mainWindow;17 const { attemptToDispatchEvent } = _electron.getInternalBinding('web_contents');18 const success = await attemptToDispatchEvent(webContents, type, options);19 event.reply('dispatch-event-reply', success);20 });21});22const { contextBridge, ipcRenderer } = require('electron');23contextBridge.exposeInMainWorld('electron', {24 dispatchEvent: (type, options) => {25 return new Promise((resolve) => {26 ipcRenderer.send('dispatch-event', { type, options });27 ipcRenderer.once('dispatch-event-reply', (event, arg) => {28 resolve(arg);29 });30 });31 },32});33const { dispatchEvent } = electron;34const { KeyboardEvent } = require('playwright');35const main = async () => {36 const keyboardEvent = new KeyboardEvent('keydown', { key: 'a' });37 const success = await dispatchEvent('keydown', keyboardEvent);38 console.log(success);39};40main();41Error: Protocol error (Runtime.callFunctionOn): Cannot find context with specified id

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Using AI Code Generation

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1const { Page } = require('playwright');2const { events } = require('playwright-core/​lib/​server/​events');3Page.prototype.attemptToDispatchEvent = function (event) {4 const { page, frame } = this;5 return events.attemptToDispatchEvent(page, frame, event);6};7const { Page } = require('playwright');8const { events } = require('playwright-core/​lib/​server/​events');9Page.prototype.attemptToDispatchEvent = function (event) {10 const { page, frame } = this;11 return events.attemptToDispatchEvent(page, frame, event);12};13const { Page } = require('playwright');14const { events } = require('playwright-core/​lib/​server/​events');15Page.prototype.attemptToDispatchEvent = function (event) {16 const { page, frame } = this;17 return events.attemptToDispatchEvent(page, frame, event);18};19const { Page } = require('playwright');20const { events } = require('playwright-core/​lib/​server/​events');21Page.prototype.attemptToDispatchEvent = function (event) {22 const { page, frame } = this;23 return events.attemptToDispatchEvent(page, frame, event);24};25const { Page } = require('playwright');26const { events } = require('playwright-core/​lib/​server/​events');27Page.prototype.attemptToDispatchEvent = function (event) {28 const { page, frame } = this;29 return events.attemptToDispatchEvent(page, frame, event);30};31const { Page } = require('

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Using AI Code Generation

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1const { internal } = require("playwright");2const dispatcher = internal.getDispatcher();3const { attemptToDispatchEvent } = dispatcher;4const { Page } = require("playwright");5const page = new Page();6const event = new Event("test-event");7attemptToDispatchEvent(page, event);

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1module.exports = {2 Internal: require('./​lib/​internal'),3};4const { Internal } = require('./​internal/​exports');5module.exports = {6};7module.exports = {8 Internal: require('./​internal'),9};10const { attemptToDispatchEvent } = require('./​dispatchers/​dispatcher');11class Internal {12 constructor(connection, context) {13 this._connection = connection;14 this._context = context;15 }16 attemptToDispatchEvent(event) {17 return attemptToDispatchEvent(this._connection, this._context, event);18 }19}20module.exports = { Internal };21function attemptToDispatchEvent(connection, context, event) {22}23const { Internal } = require('playwright');24const internal = new Internal(connection, context);25const event = {26};27internal.attemptToDispatchEvent(event);

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StackOverFlow community discussions

Questions
Discussion

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

firefox browser does not start in playwright

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

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

Running Playwright in Azure Function

firefox browser does not start in playwright

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

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