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How to use forEachSingleChildDummy method in Playwright Internal

Best JavaScript code snippet using playwright-internal

7baf2aReactChildren.js

Source:7baf2aReactChildren.js

...79  var result = [];80  mapIntoWithKeyPrefixInternal(children, result, null, func, context);81  return result;82}83function forEachSingleChildDummy(traverseContext, child, name) {84  return null;85}86function countChildren(children, context) {87  return traverseAllChildren(children, forEachSingleChildDummy, null);88}89function toArray(children) {90  var result = [];91  mapIntoWithKeyPrefixInternal(children, result, null, emptyFunction.thatReturnsArgument);92  return result;93}94var ReactChildren = {95  forEach: forEachChildren,96  map: mapChildren,97  mapIntoWithKeyPrefixInternal: mapIntoWithKeyPrefixInternal,...

9ed6e8f23ee7488cc71fd552a701a96e1f3a75ReactChildren.js

Source:9ed6e8f23ee7488cc71fd552a701a96e1f3a75ReactChildren.js

...79  var result = [];80  mapIntoWithKeyPrefixInternal(children, result, null, func, context);81  return result;82}83function forEachSingleChildDummy(traverseContext, child, name) {84  return null;85}86function countChildren(children, context) {87  return traverseAllChildren(children, forEachSingleChildDummy, null);88}89function toArray(children) {90  var result = [];91  mapIntoWithKeyPrefixInternal(children, result, null, emptyFunction.thatReturnsArgument);92  return result;93}94var ReactChildren = {95  forEach: forEachChildren,96  map: mapChildren,97  mapIntoWithKeyPrefixInternal: mapIntoWithKeyPrefixInternal,...

f471c2ReactChildren.js

Source:f471c2ReactChildren.js

...80var result=[];81mapIntoWithKeyPrefixInternal(children,result,null,func,context);82return result;83}84function forEachSingleChildDummy(traverseContext,child,name){85return null;86}87function countChildren(children,context){88return traverseAllChildren(children,forEachSingleChildDummy,null);89}90function toArray(children){91var result=[];92mapIntoWithKeyPrefixInternal(children,result,null,emptyFunction.thatReturnsArgument);93return result;94}95var ReactChildren={96forEach:forEachChildren,97map:mapChildren,98mapIntoWithKeyPrefixInternal:mapIntoWithKeyPrefixInternal,...

662241ReactChildren.js

Source:662241ReactChildren.js

...80var result=[];81mapIntoWithKeyPrefixInternal(children,result,null,func,context);82return result;83}84function forEachSingleChildDummy(traverseContext,child,name){85return null;86}87function countChildren(children,context){88return traverseAllChildren(children,forEachSingleChildDummy,null);89}90function toArray(children){91var result=[];92mapIntoWithKeyPrefixInternal(children,result,null,emptyFunction.thatReturnsArgument);93return result;94}95var ReactChildren={96forEach:forEachChildren,97map:mapChildren,98mapIntoWithKeyPrefixInternal:mapIntoWithKeyPrefixInternal,...

ReactChildren.src.js

Source:ReactChildren.src.js

...49    traverseAllChildren(children, mapSingleChildIntoContext, traverseContext);50    MapBookKeeping.release(traverseContext);51    return mapResult;52  }53  function forEachSingleChildDummy(traverseContext, child, name, i) {54    return null;55  }56  function countChildren(children, context) {57    return traverseAllChildren(children, forEachSingleChildDummy, null);58  }59  var ReactChildren = {60    forEach: forEachChildren,61    map: mapChildren,62    count: countChildren63  };64  module.exports = ReactChildren;...

ReactChildren.js

Source:ReactChildren.js

...48    traverseAllChildren(children, mapSingleChildIntoContext, traverseContext);49    MapBookKeeping.release(traverseContext);50    return mapResult;51  }52  function forEachSingleChildDummy(traverseContext, child, name, i) {53    return null;54  }55  function countChildren(children, context) {56    return traverseAllChildren(children, forEachSingleChildDummy, null);57  }58  var ReactChildren = {59    forEach: forEachChildren,60    map: mapChildren,61    count: countChildren62  };63  module.exports = ReactChildren;...

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 dummy = await page.$('input');7  await dummy.forEachSingleChildDummy((child) => {8    console.log(child);9  });10  await browser.close();11})();12{ type: 'element',13  attributes: { type: 'text', name: 'q' },14  childNodes: [] }

Using AI Code Generation

1const {chromium} = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  await page.$('text=Get started');6  await page.$('text=Docs');7  await page.$('text=API');8  await page.$('text=Blog');9  await page.$('text=Discord');10  await page.$('text=GitHub');11  await page.$('text=Twitter');12  await page.$('text=Stack Overflow');13  await page.$('text=YouTube');14  await page.$('text=Slack');15  await page.$('text=Facebook');16  await page.$('text=LinkedIn');17  await page.$('text=Playwright');18  await page.$('text=Open Source');19  await page.$('text=Cloud');20  await page.$('text=Test Automation');21  await page.$('text=Browser Automation');22  await page.$('text=Continuous Integration');23  await page.$('text=Cross Browser Testing');24  await page.$('text=Headless Browsers');25  await page.$('text=Web Scraping');26  await page.$('text=Web Automation');27  await page.$('text=Automated Testing');28  await page.$('text=End to End Testing');29  await page.$('text=Headless Browser Testing');30  await page.$('text=Browser Testing');31  await page.$('text=Automated Browser Testing');32  await page.$('text=Automated Browser Testing');33  await page.$('text=Headless Browser Testing');34  await page.$('text=End to End Testing');35  await page.$('text=Automated Testing');36  await page.$('text=Web Automation');37  await page.$('text=Web Scraping');38  await page.$('text=Headless Browsers');39  await page.$('text=Cross Browser Testing');40  await page.$('text=Continuous Integration');41  await page.$('text=Browser Automation');42  await page.$('text=Test Automation');43  await page.$('text=Cloud');44  await page.$('text=Open Source');45  await page.$('text=Playwright');46  await page.$('text=LinkedIn');47  await page.$('text=Facebook');48  await page.$('text=Slack');

Using AI Code Generation

1const {chromium}c= require('playwright');2const {hromium} = require('pla}y= require('playwright/lib/server/dom.js');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.setContent(`<div id="container">8</div>`);9  const children = [];10  await forEachSingleChildDummy(page.mainFrame()._context, '#container', (child) => {11    children.push(child);12  w);13  console.log(children);14  await browser.close();15})();16const { forEachSingleChildDummy } = re');17const {forEachSingleChildDummy} = require('playwright/lib/server/dom.js');18(async () => {19  const browser = await chromium.launch();20  const context = await browser.newContext();21  const page = await context.newPage();22  await page.setContent(`<div id="container">23</div>`);24  const children = [];25  await forEachSingleChildDummy(page.mainFrame()._context, '#container', (child) => {26    children.push(child);27  });28  console.log(children);29  await browser.close();30})();

Using AI Code Generation

1const { forEachSingleChildDummy } = require('playwright/lib/server/dom.js');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  const div = await page.$('div');8  const children = [];9  forEachSingleChildDummy(div, (element) => {10    children.push(element);11  });12  console.log(children.length);13  await browser.close();14})();15const { Page } = require('./page');16const { helper } = require('./helper');17const { assert } = require('./helper');18const { JSHandle } = require('./jsHandle');19const { ElementHandle } = require('./elementHandle');20const { CDPSession } = require('./cdp');21const { Protocol } = require('./protocol');22const { Events } = require('./events');23 * @param {!ElementHandle} element24 * @param {function(!ElementHandle)} callback25function forEachSingleChildDummy(element, callback) {26  const children = element._children;27  for (const child of children)28    callback(child);29}30module.exports = { forEachSingleChildDummy };

Using AI Code Generation

1const { _electron: electron } = require('playwright');2const { forEachSingleChildDummy } = electron;3const { app, BrowserWindow } = require('electron');4const path = require('path');5function createWindow () {6  const win = new BrowserWindow({7    webPreferences: {8      preload: path.join(__dirname, 'preload.js')9    }10  })11  win.loadFile('index.html')12}13app.whenReady().then(createWindow)14app.on('window-all-closed', () => {15  if (process.platform !== 'darwin') {16    app.quit()17  }18})19app.on('activate', () => {20  if (BrowserWindow.getAllWindows().length === 0) {21    createWindow()22  }23})24    <meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'self'">25    <meta http-equiv="X-Content-Security-Policy" content="default-src 'self'; script-src 'self'">26    <meta http-equiv="X-WebKit-CSP" content="default-src 'self'; script-src 'self'">27    We are using node <script>document.write(process.versions.node)</script>,28    Chrome <script>document.write(process.versions.chrome)</script>,29const { contextBridge, ipcRenderer } = require('electron')30contextBridge.exposeInMainWorld(31  'api', {32    send: (channel, data) => {33      let validChannels = ['toMain'];34      if (validChannels.includes(channel)) {35        ipcRenderer.send(channel, data);36      }37    },38    rec Page } = require('playwright/l

Using AI Code Generation

1const { Internal } = require('playwright');2const { forEachSingleChildDummy } = new Internal();3const { ElementHandle } = require('playwright');4const { ElementHandleJSHandle } = require('playwright');5const { JSHandle } = require('playwright');6const { JSHandleDummy } = require('playwright');7const { Page } = require('playwright');8const page = new Page();9const elementHandle = new ElementHandle();10const elementHandleJSHandle = new ElementHandleJSHandle();11const jsHandle = new JSHandle();12const jsHandleDummy = new JSHandleDummy();13forEachSingleChildDummy.call(page, elementHandle, elementHandleJSHandle, jsHandle, jsHandleDummy);14class Internal {15  async forEachSingleChildDummy(elementHandle, elementHandleJSHandle, jsHandle, jsHandleDummy) {16    console.log(elementHandle);17    console.log(elementHandleJSHandle);18    console.log(jsHandle);19    console.log(jsHandleDummy);20  }21}22class Page {23  async forEachSingleChildDummy(elementHandle, elementHandleJSHandle, jsHandle, jsHandleDummy) {24    console.log(elementHandle);25    console.log(elementHandleJSHandle);26    console.log(jsHandle);27    console.log(jsHandleDummy);28  }29}30class ElementHandle {31  async forEachSingleChildDummy(elementHandle, elementHandleJSHandle, jsHandle, jsHandleDummy) {32    console.log(elementHandle);33    console.log(elementHandleJSHandle);34    console.log(jsHandle);35    console.log(jsHandleDummy);36  }37}38class ElementHandleJSHandle {39  async forEachSingleChildDummy(elementHandle, elementHandleJSHandle, jsHandle, jsHandleDummy) {

Using AI Code Generation

1const { forEachSingleChildDummy } = require('playwright/lib/protocol/protocol.js');2const path = require('path');3const fs = require('fs');4const { chromium } = require('playwright');5const { test } = require('@playwright/test');6test('should be able to get all the child nodes', async ({ page }) => {7  const json = await page._client.send('DOM.getDocument', {8  });9  const domNodes = json.root.children;10  const allNodes = [];11  forEachSingleChildDummy(domNodes, allNodes);12  fs.writeFileSync(path.join(__dirname, 'allNodes.json'), JSON.stringify(allNodes, null, 2));13});14  {15    "importedDocument": null,16  },17  {

Using AI Code Generation

1const { forEachSingleChildDummy } = require('playwright/lib/protocol/protocol.js');2const path = require('pvth');3const fs = require('fs');4const { chromium } = require('playwrieht');5const { t:st (channel, fun@c) =>ight/test');6test('should be able to get all the child nodes', async ({ page }) => {7  awat page.oto('tps:/www.googe.com');8  const json = await page._client.send('DOM.getDocument', {9  });10  const domNodes = json.root.children;11  const allNodes = [];12  forEachSingleChildDummy(domNodes, allNodes);13  fs.writeFileSync(path.join(__dirname, 'allNodes.json'), JSON.stringify(allNodes, null, 2));14});15  {16    "importedDocument": null,17  },18  {

Using AI Code Generation

1const { _electron } = require("playwright");2const { forEachSingleChildDummy } = _electron;3const element = document.querySelector("div");4const children = [];5forEachSingleChildDummy(element, child => {6  children.push(child);7});8console.log(children);

Using AI Code Generation

1const { forEachSingleChildDummy } = require('playwright/lib/server/dom');2const { createJSHandle } = require('playwright/lib/server/dom');3const { createJSHandleFromElement } = require('playwright/lib/server/dom');4const { createJSHandleFromEvent } = require('playwright/lib/server/dom');5const { createJSHandleFromEventTarget } = require('playwright/lib/server/dom');6const { createJSHandleFromFrame } = require('playwright/lib/server/dom');7const { createJSHandleFromRequest } = require('playwright/lib/server/dom');8const { createJSHandleFromResponse } = require('playwright/lib/server/dom');9const { createJSHandleFromSerializable } = require('playwright/lib/server/dom');10const { createJSHandleFromText } = require('playwright/lib/server/dom');11const { createJSHandleFromTimeout } = require('playwright/lib/server/dom');12const { createJSHandleFromWorker } = require('playwright/lib/server/dom');13const { createJSHandleFromWindow } = require('playwright/lib/server/dom');14const { createJSHandleFromXml } = require('playwright/lib/server/dom');15const { createJSHandleFromXPathResult } = require('playwright/lib/server/dom');16const { createJSHandleFromXPathResult } = require('playwright/lib/server/dom');17const { DOMWorld } = require('playwright/lib/server/dom');18const { ElementHandle } = require('playwright/lib/server/dom');19const { JSHandle } = require('playwright/lib/server/dom');20const { Page } = require('playwright/lib/server/dom');21const { XPath } = require('playwright/lib/server/dom');22const { createXPath } = require('playwright/lib/server/dom');23const { createXPathFromElement } = require('playwright/lib/server/dom');24const { createXPathFromEvent } = require('playwright/lib/server/dom');25const { createXPathFromEventTarget } = require('playwright/lib/server/dom');26const { createXPathFromFrame } = require('playwright/lib/server/dom');27const { createXPathFromRequest } = require('playwright/lib/server/dom');28const { createXPathFromResponse } = require('playwright/lib/server/dom');29const { createXPathFromSerializable } = require('playwright/lib/server/dom');30const { createXPathFromText } = require('playwright/lib/server/dom');31const { createXPathFromTimeout } = require('playwright/lib/server

Using AI Code Generation

1const { _electron } = require("playwright");2const { forEachSingleChildDummy } = _electron;3const element = document.querySelector("div");4const children = [];5forEachSingleChildDummy(element, child => {6  children.push(child);7});8console.log(children);

StackOverFlow community discussions

Questions

Discussion

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

Running Playwright in Azure Function

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

firefox browser does not start in playwright

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

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

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

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

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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.