Unlock 30% off on Manual Testing Annual Plans this Holiday Season. 
Use Code: LCMYEARENDEXCL30
Use Code: LCMYEARENDEXCL30Check icon
Copied to Clipboard!
How to use flattenChildren method in Playwright Internal
Best JavaScript code snippet using playwright-internal
StrucLens.js
Source:StrucLens.js 
...19export const flattenChildren = (item) =>{20 const flattened = item.reduce((acc, x) => {21 acc.push(x)22 if (x.children) {23 acc = acc.concat(flattenChildren(x.children))24 }25 return acc26 }, [])27 // console.log('----flattened=',flattened)28 return flattened29}30//-----------|||||||||||||||||||---------------------------------------------31export const hasFlavorDescendent = (flav, item) => hasFlavor(flav, flattenChildren([item]))32//-----------|||||||||||||||||||---------------------------------------------33export const hasAncestorByKeyRegx = (item, key, valRegx) => {34 let hasIt = false35 let curr = item.parent()36 while (curr && !(hasIt = (curr[key].match(valRegx))) ) {curr = curr.parent()}37 return hasIt38}39//-----------||||||||||||||||||//---------------------------------------------40export const findStrucByKeyRegx = (item, key, valRegx) => {41 if (typeof valRegx == 'string') valRegx = new RegExp(valRegx)42 const st = flattenChildren(item).filter(x=>(x[key].match(valRegx)))43 return (st && st.length > 0 && st[0]) || []44}45//-----------||||||||||||||||||//---------------------------------------------46export const findStrucsByParentKeyRegx = (item, key, valRegx) => {47 if (typeof valRegx == 'string') valRegx = new RegExp(valRegx)48 const sts = flattenChildren(item).filter(x=>(x?.parent?.()?.[key]?.match(valRegx)))49 return sts || []50}51//-----------||||||||||||||||||//---------------------------------------------52export const findStrucByName = (name, item) => {53 return findStrucByKeyRegx(item,'name',name)54 // const st = flattenChildren(item).filter(x=>(x.name===name))55 // return (st && st.length > 0 && st[0]) || []56}57//-----------|||||||||||||||||---------------------------------------------58export const findStrucByHandle = (handle, item, key) => {59 return findStrucByKeyRegx(item,'handle',handle)60 // const st = flattenChildren(item).filter(x=>(x.handle===handle))61 // return (st && st.length > 0 && st[0]) || []62}63//-----------|||||||||---------------------------------------------64export const StrucLens = ({ list, item, ...bind }) => {65 if (list) return <RecursorList {...{ list, ...bind }} />66 return <Recursor {...{ item, ...bind }} />67}68//-----------||||||||||||||||||||---------------------------------------------69export const StrucLensByKeyToComp = (key,valRegx,Comp) => ({...bind}) => {70 if (typeof valRegx == 'string') valRegx = new RegExp(valRegx)71 const compFinder = (item) => (72 (item[key].match(valRegx)) ? [Comp,null,null] : [null,null,null]73 )74 return <StrucLens {...{compFinder, ...bind}}/>...
6 FlattenChildren.js
Source:6 FlattenChildren.js
...80list3.add('cat').add('dog').add('horse')81list1.head.child = list2;82list.tail.child = list3;83// console.log(FlattenChildren(list1).toString());84console.log(list1.flattenChildren().toString());...
flattenChildren.test.js
Source:flattenChildren.test.js
1import { flattenChildren } from '../src/Luy/createElement';2describe('flattenChildren', () => {3 describe('give flattenChildren an array', () => {4 it('[1,2,3,4,5,67,8,8]', () => {5 const ary = flattenChildren([1, 2, 3, 4, 5, 67, 8, 8])6 expect(ary[0]).toEqual({ "key": null, "owner": null, "props": "123456788", "ref": null, "type": "#text" })7 });8 it('[1, 2, 3, { a: 4 }, 5, 67, 8, 8]', () => {9 const ary = flattenChildren([1, 2, 3, { a: 4 }, 5, 67, 8, 8])10 expect(ary).toEqual([{ "key": null, "owner": null, "props": "123", "ref": null, "type": "#text" }, { "a": 4 }, { "key": null, "owner": null, "props": "56788", "ref": null, "type": "#text" }])11 });12 it('1asc', () => {13 const ary = flattenChildren('1asc')14 expect(ary).toEqual({ "key": null, "owner": null, "props": "1asc", "ref": null, "type": "#text" }, { "a": 4 })15 });16 it('[{a:123},2,3]', () => {17 const ary = flattenChildren([{a:123},2,3])18 expect(ary).toEqual([{"a": 123}, {"key": null, "owner": null, "props": "23", "ref": null, "type": "#text"}])19 });20 it('[[1,2,3],"sss"]', () => {21 const ary = flattenChildren([[1,2,3],"sss"])22 expect(ary).toEqual([1,2,3, {"key": null, "owner": null, "props": "sss", "ref": null, "type": "#text"}])23 });24 it('[[1,2,3],"sss",[1,2,3]]', () => {25 const ary = flattenChildren([[1,2,3],"sss",[1,2,3]])26 expect(ary).toEqual([1,2,3, {"key": null, "owner": null, "props": "sss", "ref": null, "type": "#text"},1,2,3])27 });28 it('[[1,2,3],"sss","sss",[1,2,3]]', () => {29 const ary = flattenChildren([[1,2,3],"sss","sss",[1,2,3]])30 expect(ary).toEqual([1,2,3, {"key": null, "owner": null, "props": "ssssss", "ref": null, "type": "#text"},1,2,3])31 });32 it('[[1,2,3],"sss",[1,2,3],"sss"]', () => {33 const ary = flattenChildren([[1,2,3],"sss",[1,2,3],"sss",])34 expect(ary).toEqual([1,2,3, {"key": null, "owner": null, "props": "sss", "ref": null, "type": "#text"},1,2,3,{"key": null, "owner": null, "props": "sss", "ref": null, "type": "#text"}])35 });36 });...
ReactChildReconciler.js
Source:ReactChildReconciler.js
...5var instantiateReactComponent = require("./instantiateReactComponent");6var shouldUpdateReactComponent = require("./shouldUpdateReactComponent");7var ReactChildReconciler = {8 instantiateChildren: function(nestedChildNodes, transaction, context) {9 var children = flattenChildren(nestedChildNodes);10 for (var name in children) {11 if (children.hasOwnProperty(name)) {12 var child = children[name];13 var childInstance = instantiateReactComponent(child, null);14 children[name] = childInstance;15 }16 }17 return children;18 },19 updateChildren: function(prevChildren, nextNestedChildNodes, transaction, context) {20 var nextChildren = flattenChildren(nextNestedChildNodes);21 if (!nextChildren && !prevChildren) {22 return null;23 }24 var name;25 for (name in nextChildren) {26 if (!nextChildren.hasOwnProperty(name)) {27 continue;28 }29 var prevChild = prevChildren && prevChildren[name];30 var prevElement = prevChild && prevChild._currentElement;31 var nextElement = nextChildren[name];32 if (shouldUpdateReactComponent(prevElement, nextElement)) {33 ReactReconciler.receiveComponent(prevChild, nextElement, transaction, context);34 nextChildren[name] = prevChild;...
_internal_collection.js
Source:_internal_collection.js
...10(function (CollectionType) {11 CollectionType["Item"] = "Item";12 CollectionType["Section"] = "Section";13})(CollectionType || (CollectionType = {}));14function flattenChildren(children) {15 const childArray = [];16 React.Children.forEach(children, (child) => {17 if (React.isValidElement(child) && isFragment(child)) {18 childArray.push(...flattenChildren(child.props.children));19 } else {20 childArray.push(child);21 }22 });23 return childArray;24}25function renderElement(Element) {26 const key = Element.key;27 const type =28 typeof Element.type === "function"29 ? Element.type.__collectionType30 : Element.type;31 if (type === CollectionType.Section) {32 const childArray = [];33 const children = Element.props.children;34 if (exists(children)) {35 React.Children.forEach(flattenChildren(children), (child) => {36 if (React.isValidElement(child)) {37 const key = child.key;38 childArray.push(39 <Item key={key} textValue={`${key}`}>40 {React.cloneElement(child, child.props)}41 </Item>42 );43 }44 });45 }46 return (47 <Section title={React.cloneElement(Element, Element.props)}>48 {childArray}49 </Section>50 );51 }52 return (53 <Item key={key} textValue={`${key}`}>54 {React.cloneElement(Element, Element.props)}55 </Item>56 );57}58export function renderCollection(children) {59 if (!exists(children)) {60 return null;61 }62 const childArray = [];63 React.Children.forEach(flattenChildren(children), (child) => {64 if (React.isValidElement(child)) {65 childArray.push(renderElement(child));66 }67 });68 if (childArray.length === 1) {69 return childArray[0];70 }71 return childArray;...
Children.js
Source:Children.js
...9 if (typeNumber(childVnode) !== 7) {10 return [callback.call(context, childVnode, 0)]11 }12 var ret = []13 flattenChildren(childVnode).forEach((oldVnode, index) => {14 let newVnode = callback.call(context, oldVnode, index)15 if (newVnode === null) {16 return17 }18 ret.push(newVnode)19 })20 return ret21 },22 only(childVnode) {23 if (typeNumber(childVnode) !== 7) {24 return childVnode25 }26 throw new Error("React.Children.only expect only one child, which means you cannot use a list inside a component");27 },28 count(childVnode) {29 if (childVnode === null) {30 return 031 }32 if (typeNumber(childVnode) !== 7) {33 return 134 }35 return flattenChildren(childVnode).length36 },37 forEach(childVnode, callback, context) {38 let flatten = flattenChildren(childVnode)39 if (typeNumber(flatten) === 7) {40 flattenChildren(childVnode).forEach(callback, context);41 } else {42 callback.call(context, childVnode, 0)43 }44 },45 toArray: function (childVnode) {46 if (childVnode == null) {47 return [];48 }49 return Children.map(childVnode, function (el) {50 return el;51 });52 }...
flattenChildren.js
Source:flattenChildren.js
...6 function flattenSingleChildIntoContext(traverseContext, child, name) {7 var result = traverseContext;8 var keyUnique = !result.hasOwnProperty(name);9 if ("production" !== process.env.NODE_ENV) {10 ("production" !== process.env.NODE_ENV ? warning(keyUnique, 'flattenChildren(...): Encountered two children with the same key, ' + '`%s`. Child keys must be unique; when two children share a key, only ' + 'the first child will be used.', name) : null);11 }12 if (keyUnique && child != null) {13 result[name] = child;14 }15 }16 function flattenChildren(children) {17 if (children == null) {18 return children;19 }20 var result = {};21 traverseAllChildren(children, flattenSingleChildIntoContext, result);22 return result;23 }24 module.exports = flattenChildren;...
menuItems.spec.js
Source:menuItems.spec.js
...20 ),21)(items);22describe('menuItems', () => {23 it('icons are valid', () => {24 const flattenMenu = flattenChildren(menuItems);25 const iconItems = R.filter((item) => 'iconSrc' in item)(flattenMenu);26 iconItems.forEach(({ iconSrc }) => {27 expect(iconSrc).toBeTruthy();28 });29 });...
Using AI Code Generation
1const { chromium } = require('playwright');2const { flattenChildren } = require('playwright/lib/server/dom');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 const userAgent = await page.evaluate(() => navigator.userAgent);8 console.log(userAgent);9 await browser.close();10})();
Using AI Code Generation
1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch();4 const page = await browser.newPage();5 const children = await page.$eval('body', e => e._internalApi().flattenChildren(e, 0));6 console.log(children);7 await browser.close();8})();
Using AI Code Generation
1const { flattenChildren } = require('@playwright/test/lib/test');2const { test } = require('@playwright/test');3test('test', async ({ page }) => {4 const links = await page.$$eval('text=Get started >> a', flattenChildren);5 console.log(links);6});7const { test } = require('@playwright/test');8test('test', async ({ page }) => {9 const links = await page.$$eval('text=Get started >> a', (nodes) => {10 return nodes.map((node) => node.innerText);11 });12 console.log(links);13});14const { flattenChildren } = require('@playwright/test/lib/test');15const { test } = require('@playwright/test');16test('test', async ({ page }) => {17 const links = await page.$$eval('text=Get started >> a', flattenChildren);18 console.log(links);19});20const { flattenChildren } = require('@playwright/test/lib/test');21const { test } = require('@playwright/test');22test('test', async ({ page }) => {23 const links = await page.$$eval('
Using AI Code Generation
1const { flattenChildren } = require('playwright/lib/server/dom.js');2const { chromium } = require('playwright');3const { expect } = require('chai');4(async () => {5 const browser = await chromium.launch();6 const context = await browser.newContext();7 const page = await context.newPage();8 const elementHandle = await page.$('text=Docs');9 const children = flattenChildren(elementHandle);10 expect(children.length).to.equal(2);11 await browser.close();12})();13const { flattenChildren } = require('playwright/lib/server/dom.js');14const { chromium } = require('playwright');15const { expect } = require('chai');16(async () => {17 const browser = await chromium.launch();18 const context = await browser.newContext();19 const page = await context.newPage();20 const elementHandle = await page.$('text=Docs');21 const children = flattenChildren(elementHandle);22 expect(children[0].textContent).to.equal('Docs');23 await browser.close();24})();25const { flattenChildren } = require('playwright/lib/server/dom.js');26const { chromium } = require('playwright');27const { expect } = require('chai');28(async () => {29 const browser = await chromium.launch();30 const context = await browser.newContext();31 const page = await context.newPage();32 const elementHandle = await page.$('text=Docs');33 const children = flattenChildren(elementHandle);34 expect(children[0].tagName).to.equal('A');35 await browser.close();
Using AI Code Generation
1const { flattenChildren } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');2const { test, expect } = require('@playwright/test');3test('Test', async ({ page }) => {4 const selector = 'text=Get Started';5 const elements = await page.$$(selector);6 const flattened = flattenChildren(elements);7 console.log(flattened);8 expect(flattened.length).toBe(1);9 expect(flattened[0]).toBe(elements[0]);10});
Using AI Code Generation
1const { flattenChildren } = require('playwright-core/lib/server/dom.js');2const { parse } = require('playwright-core/lib/server/dom.js');3const { serialize } = require('playwright-core/lib/server/dom.js');4</div>`;5const dom = parse(html);6console.log('dom:', dom);7const flattenedChildren = flattenChildren(dom);8console.log('flattenedChildren:', flattenedChildren);9const serialized = serialize(dom);10console.log('serialized:', serialized);11dom: {12}13 {14 },15 {16 },17 {18 },19 {20 },21 {22 },23 {24 },25 {26 },27 {28 }29serialized: {30}
Using AI Code Generation
1const { Playwright } = require('playwright');2const { flattenChildren } = Playwright._internal;3const { ElementHandle } = require('playwright/lib/cjs/puppeteer/common/JSHandle');4ElementHandle.prototype.flattenChildren = flattenChildren;5const { chromium } = require('playwright');6(async () => {7 const browser = await chromium.launch({ headless: false });8 const context = await browser.newContext();9 const page = await context.newPage();10 const input = await page.$('input[name="q"]');11 await input.type('Hello World');12 await page.screenshot({ path: `example.png` });13 await browser.close();14})();15<code>Promise<[Array]<[Object]>>></code>
Using AI Code Generation
1const {helper} = require('playwright/lib/helper');2const {flattenChildren} = helper;3 {name: 'a', children: [{name: 'b'}, {name: 'c'}]},4 {name: 'd', children: [{name: 'e'}]},5];6console.log(flattenChildren(children));7Please read [CONTRIBUTING.md](
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.
Run Playwright Internal automation tests on LambdaTest cloud grid
Perform automation testing on 3000+ real desktop and mobile devices online.
Try LambdaTest Now !!
Get 100 minutes of automation test minutes FREE!!
Was this article helpful?
