How to use forEachChildren method in Playwright Internal

Best JavaScript code snippet using playwright-internal

subscription-tree.js

Source: subscription-tree.js Github

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1/​/​ HACK: to gain access to the subscription prototype, see below.2var Subscription;3/​/​ Use "psuedo-subscription" objects that represent4/​/​ the document levels. 5/​/​6/​/​ The rules are:7/​/​ - an outer sub kills it's children, like computations8/​/​ - each inner sub is attached to a document, when the doc is removed,9/​/​ the sub is stopped10/​/​ - child subs pass added/​etc/​ready to parent sub11/​/​ - parent sub is only ready when all children + itself are ready.12SubscriptionTree = function(parentSubscription, notRoot) {13 var self = this;14 15 /​/​ this will definitely work the first time ;)16 if (! notRoot) {17 setSubscriptionPrototype(parentSubscription.constructor);18 }19 20 /​/​ it's too late to call Meteor._inherits so let's try this slightly wacky21 /​/​ approach22 _.extend(this.constructor.prototype, Subscription.prototype, subscriptionTreeMethods);23 24 25 /​/​ XXX: should we generate a name like flips.0.1?, likewise a _subscriptionId?26 /​/​ for the moment all names are undefined, this will appear a universal sub27 Subscription.call(self, parentSubscription._session);28 29 self._root = ! notRoot;30 self.parent = parentSubscription;31 self._children = [];32 /​/​ is this particular subscription ready?33 self._nodeReady = false;34 /​/​ is the entire tree of this and it's children ready?35 self._treeReady = false;36 self.parent.onStop(function() {37 self.stop();38 });39}40var subscriptionTreeMethods = {41 /​/​ TODO: is this the best name?42 publish: function(handler) {43 /​/​ TODO: should we not be so hacky here?44 this._handler = handler;45 this._params = Array.prototype.slice.call(arguments, 1);46 this._runHandler();47 },48 49 publishChild: function(handler /​*, arguments */​) {50 var child = new SubscriptionTree(this, true);51 this._children.push(child);52 child.publish.apply(child, arguments);53 return child;54 },55 _checkTreeReady: function() {56 var allChildrenReady = _.all(this._children, function(child) {57 return child._treeReady;58 });59 this._treeReady = (allChildrenReady && this._nodeReady);60 if (this._treeReady) { 61 if (this._root) {62 this.parent.ready();63 } else {64 this.parent._checkTreeReady();65 }66 }67 },68 69 /​/​ TODO: could take fields as an argument to allow only responding to70 /​/​ changes to relevant fields71 forEach: function(cursor, handler) {72 var self = this;73 74 /​/​ : _id => SubscriptionTree75 var forEachChildren = {};76 var addChild = function(id, doc) {77 forEachChildren[id] = self.publishChild(handler, _.extend({_id: id}, doc));78 };79 var handle = cursor.observeChanges({80 added: function(id, doc) {81 addChild(id, doc);82 }, 83 changed: function(id, mod) {84 /​/​ if we had fields above, we could short-circuit in some cases here.85 86 /​/​ TODO: are there any conditions under which we can re-use the old sub?87 /​/​ - Not in general88 /​/​ - If old + new both returned cursors, could we check if they are89 /​/​ the same? Or is that a pointless optimization?90 var oldChild = forEachChildren[id];91 92 /​/​ TODO: there should be an official API to do this?93 var doc = handle._multiplexer._cache.docs.get(id);94 addChild(id, doc);95 96 /​/​ We stop the old child after we start the new sub, so if there97 /​/​ are common cursors, we don't teardown and re-establish the98 /​/​ observers -- we just gracefully re-use the old one.99 oldChild.stop();100 self._checkTreeReady();101 },102 removed: function(id) {103 forEachChildren[id].stop();104 delete forEachChildren[id];105 self._checkTreeReady();106 }107 });108 },109 110 ready: function() {111 this._nodeReady = true;112 this._checkTreeReady();113 },114 stop: function() {115 this._removeAllDocuments();116 this._deactivate();117 }118};119var setSubscriptionPrototype = function(s) {120 if (Subscription) {121 return;122 }123 124 Subscription = s;...

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SquaresPackLayout.js

Source: SquaresPackLayout.js Github

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...14 };15 var translateElement = function(element, x,y){16 element.x += x;17 element.y += y;18 forEachChildren(element, function(c){translateElement(c,x,y)});19 };20 var getBoundingBox = function(elements){21 if(elements.length > 0){22 var minX = _.min(elements, function(e){return e.x}).x;23 var minY = _.min(elements, function(e){return e.x}).y;24 var maxXelement = _.max(elements, function(e){return e.x + e.dx});25 var maxYelement = _.max(elements, function(e){return e.y + e.dy});26 var maxWidth = maxXelement.x + maxXelement.dx;27 var maxHeight = maxYelement.y + maxYelement.dy;28 return [minX, minY, maxWidth, maxHeight];29 } else {30 return [0,0,size,size];31 }32 };33 var packElements = function(elements){34 elements = _.sortBy(elements, function (e) {return e.dx}).reverse();35 var singleElements = elements.filter(function (e) {return children(e).length == 0});36 if(singleElements.length > 1){37 elements = _.difference(elements, singleElements);38 elements.push(gridPack(singleElements));39 }40 var x = margin;41 var y = margin;42 elements.forEach(function (element) {43 translateElement(element,x,y);44 if(x + element.dx <= y + element.dy){45 x += element.dx + padding;46 } else {47 y += element.dy + padding;48 }49 })50 };51 var gridPack = function(elements){52 var maxDx = _.max(elements, function(e){return e.dx}).dx;53 var maxDy = _.max(elements, function(e){return e.dy}).dy;54 var columns = Math.ceil(Math.sqrt(elements.length));55 var x = 0;56 var y = 0;57 for(var i = 0; i < elements.length; i++){58 var element = elements[i];59 if(i != 0 && i % columns == 0){60 x = 0;61 y += maxDy + padding;62 }63 translateElement(element,x,y);64 x += element.dx + padding;65 }66 return {x: 0, y:0, dx: x, dy: y + maxDy, children: elements, _squarePackDummy : true}67 };68 var recursivePacking = function(root, depth){69 forEachChildren(root, function(child){70 child.parent = root;71 recursivePacking(child, depth + 1);72 });73 var elements = children(root);74 packElements(elements);75 var bbox = getBoundingBox(elements);76 root.x = 0;77 root.y = 0;78 root.dx = bbox[2]/​/​Math.max(bbox[2],bbox[3]);79 root.dy = bbox[3]/​/​Math.max(bbox[2],bbox[3]);80 if(elements.length != 0){81 root.dx += margin;82 root.dy += margin;83 }84 root.depth = depth;85 };86 self.nodes = function(root){87 var list = [root];88 forEachChildren(root, function(child){89 list = list.concat(self.nodes(child));90 });91 return list;92 };93 self.pack = function(root){94 recursivePacking(root,0);95 root.dx = Math.max(root.dx,root.dy);96 root.dy = root.dx;97 };98 return self;...

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lapaLine.js

Source: lapaLine.js Github

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...19 }20 }21 go() {22 this.startAnimate();23 this.forEachChildren((child) => {24 child.go();25 })26 }27 stop(data = []) {28 this.forEachChildren((child, i) => {29 child.stop(data[i]);30 })31 }32 forEachChildren(fn) {33 for (let i = 0, l = this.numChildren; i < l; i++) {34 fn(this.getChildAt(i), i);35 }36 }37 startAnimate() {38 Laya.Tween.from(this, { y: -100 }, 100, Laya.Ease.backOut);39 }40 /​/​ 播放连线动画41 playLine(lineNumber, posLineArr, num, animateCB) {42 /​/​ 播放的元素索引43 let i = posLineArr.indexOf(lineNumber);44 let arr = [0, 0, 0];45 arr[i] = 1;46 arr.unshift(0);47 /​/​ 是否播放翻钱48 let dollarIndex = this.initIndex < num;49 this.forEachChildren((child, i) => {50 child.play(arr[i], dollarIndex, animateCB);51 })52 }53 /​/​ 播放百搭动画54 playBaida(picItem, animateCB) {55 this.forEachChildren((child, i) => {56 let bool = picItem[i] === 7;57 child.play(bool, true, animateCB);58 })59 }60 /​/​ 停止后的动画61 stopHandler(i) {62 if (i === 3) {63 Laya.Tween.from(this, { y: 200 }, 150, Laya.Ease.backOut, Laya.Handler.create(this, () => {64 this.endCallBack(this.initIndex);65 }));66 }67 }...

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table.js

Source: table.js Github

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...38 },39 ]40 }41 const newChildren = []42 forEachChildren(children, (child, index) => {43 newChildren.push(44 <View key={index} style={[TableStyle.cell_regular, getCellStyle(index)]}>45 {child}46 </​View>47 )48 })49 return React.createElement(50 Row,51 { style: header ? null : TableStyle.row_regular },52 ...newChildren53 )54}55export function Table(props) {56 const { proportions, rowStyle, children, ...nextProps } = props57 const newChildren = []58 forEachChildren(children, (child) => {59 newChildren.push(React.cloneElement(child, { proportions: proportions }))60 })61 return React.createElement(Column, nextProps, ...newChildren)...

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test.js

Source: test.js Github

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...19forEachChildrenBtn.onclick = function(){20 var params1 = (new Function('return '+forEachChildrenInputs[0].value))();21 var params2 = new Function('item','index',forEachChildrenInputs[1].value);22 var params3 = (new Function('return '+forEachChildrenInputs[2].value))();23 forEachChildren(params1,params2,params3)24}25/​/​binaryPlus26var binaryPlusContainer = document.getElementById('binaryPlus')27var binaryPlusInputs = binaryPlusContainer.getElementsByTagName('input')28var binaryPlusBtn = binaryPlusContainer.getElementsByTagName('button')[0]29binaryPlusBtn.onclick = function(){30 var params1 = (new Function('return '+binaryPlusInputs[0].value))();31 var params2 = (new Function('return '+binaryPlusInputs[1].value))();32 binaryPlusInputs[2].value = binaryPlus(params1,params2)...

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rk_layout.js

Source: rk_layout.js Github

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1var _ = require('lodash')2var foreachChildren = function (layoutInfo, callback) {3 (callback)(layoutInfo);4 var children = layoutInfo.children;5 if (children) {6 if (_.isArray(children)) {7 for (var i = 0, len = children.length; i < len; i++) {8 children[i]._parent = layoutInfo;9 foreachChildren(children[i], callback)10 }11 } else {12 for (var key in children) {13 var arr = children[key];14 for (var i = 0, len = arr.length; i < len; i++) {15 arr[i]._parent = layoutInfo;16 foreachChildren(arr[i], callback)17 }18 }19 }20 }21};22module.exports = {23 foreachChildren: foreachChildren...

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index.js

Source: index.js Github

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1import forEach from './​libs/​forEach'2import forEachChildren from './​libs/​forEachChildren'3import binaryPlus from './​libs/​binaryPlus'4export {5 forEach,6 forEachChildren,7 binaryPlus...

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ReactChildren.js

Source: ReactChildren.js Github

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1function forEachChildren() {}2export default {3 map: forEachChildren,...

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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 context = await browser.newContext();5 const page = await context.newPage();6 const handle = await page.$('input[name="q"]');7 const input = handle.asElement();8 const children = await input._client.send('DOM.getFlattenedDocument');9 children.forEach((child) => {10 console.log(child);11 });12 await browser.close();13})();14{ nodeId: 2, backendNodeId: 2, nodeType: 1, nodeName: 'HTML', localName: 'html', nodeValue: '', childNodeCount: 1, children: [ [Object] ], attributes: [] }15{ nodeId: 3, backendNodeId: 3, nodeType: 1, nodeName: 'HEAD', localName: 'head', nodeValue: '', childNodeCount: 1, children: [ [Object] ], attributes: [] }16{ nodeId: 4, backendNodeId: 4, nodeType: 1, nodeName: 'BODY', localName: 'body', nodeValue: '', childNodeCount: 1, children: [ [Object] ], attributes: [] }17{ nodeId: 5, backendNodeId: 5, nodeType: 1, nodeName: 'DIV', localName: 'div', nodeValue: '', childNodeCount: 1, children: [ [Object] ], attributes: [ [Object], [Object] ] }18{ nodeId: 6, backendNodeId: 6, nodeType: 1, nodeName: 'DIV', localName: 'div', nodeValue: '', childNodeCount: 1, children: [ [Object] ], attributes: [ [Object], [Object] ] }19{ nodeId: 7, backendNodeId: 7, nodeType: 1, nodeName: 'DIV', localName: 'div', nodeValue: '', childNodeCount: 1, children: [ [Object] ], attributes: [ [Object], [Object], [Object] ] }20{ nodeId: 8, backendNodeId: 8, nodeType: 1, nodeName: 'DIV', localName: 'div', nodeValue: '', childNodeCount: 3, children: [ [Object], [Object], [Object] ], attributes:

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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 context = await browser.newContext();5 const page = await context.newPage();6 await page.$eval('h1', (element) => {7 element.forEachChildren((childNode) => {8 console.log(childNode.textContent);9 });10 });11 await browser.close();12})();13elementHandle.forEachChildren(callback[, options])14elementHandle.forEachChildren(async callback[, options])15const { chromium } = require('playwright');16(async () => {17 const browser = await chromium.launch();18 const context = await browser.newContext();19 const page = await context.newPage();20 await page.$eval('h1', (

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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 context = await browser.newContext();5 const page = await context.newPage();6 await page.evaluate(() => {7 const element = document.querySelector('.navbar__inner');8 element.forEachChild(child => {9 console.log(child);10 });11 });12 await browser.close()

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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 context = await browser.newContext();5 const page = await context.newPage();6 const search = await page.$('input[name="q"]');7 const searchInput = await search._client.send('DOM.resolveNode', { nodeId: search._nodeId });8 const children = await searchInput.objectId._client.send('DOM.getFlattenedDocument', { depth: 1, pierce: false });9 await children.nodes.forEach(node => console.log(node.localName));10 await browser.close();11})();

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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('text=Get started');6 const element = await page.$('text=Get started');7 element.forEachChildren(async (child) => {8 console.log(child);9 });10 await browser.close();11})();12{ _guid: 'elementHandle-1',13 Page {14 BrowserContext {

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Using AI Code Generation

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1const playwright = require('playwright');2(async () => {3const browser = await playwright['chromium'].launch();4const context = await browser.newContext();5const page = await context.newPage();6await page.waitForSelector('input[title="Search"]');7await page.fill('input[title="Search"]', 'Playwright');8await page.keyboard.press('Enter');9await page.waitForSelector('h3');10await page.forEachChild('h3', (element) => {11console.log(element.textContent);12});13await browser.close();14})();

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Using AI Code Generation

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1const { chromium } = require('playwright');2const { forEachChild } = require('playwright/​lib/​client/​selectorEngine');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 const elements = await page.$$('input');8 elements.forEach(element => {9 console.log(element.name);10 });11 await browser.close();12})();13const { chromium } = require('playwright');14(async () => {15 const browser = await chromium.launch();16 const context = await browser.newContext();17 const page = await context.newPage();18 const elements = await page.$$('input');19 elements.forEach(element => {20 console.log(element.name);21 });22 await browser.close();23})();24const { chromium } = require('playwright');25(async () => {26 const browser = await chromium.launch();27 const context = await browser.newContext();28 const page = await context.newPage();29 const elements = await page.$$('input');30 elements.forEach(element => {31 console.log(element.name);32 });33 await browser.close();34})();35const { chromium } = require('playwright');36(async () => {37 const browser = await chromium.launch();38 const context = await browser.newContext();39 const page = await context.newPage();40 const elements = await page.$$('input');41 elements.forEach(element => {42 console.log(element.name);43 });44 await browser.close();45})();46const { chromium } = require('playwright');47(async () => {

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Using AI Code Generation

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1const { Page } = require('@playwright/​test/​lib/​server/​page');2const { Internal } = require('@playwright/​test/​lib/​server/​internal');3const { ElementHandle } = require('@playwright/​test/​lib/​server/​dom');4const { Frame } = require('@playwright/​test/​lib/​server/​frame');5const { JSHandle } = require('@playwright/​test/​lib/​server/​jsHandle');6async function main() {7 const page = await Page.create(null, null, null, null, null, null, null, null, null, null, n

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Using AI Code Generation

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1import { test, expect } from "@playwright/​test";2import { forEachChild } from "@playwright/​test/​lib/​internal/​selectorEngine";3import { Locator } from "@playwright/​test/​lib/​locator";4test("Test", async ({ page }) => {5 const searchBox = await page.$("input[name='q']");6 await searchBox.fill("Playwright");7 await page.waitForTimeout(1000);8 await page.keyboard.press("Enter");9 await page.waitForTimeout(1000);10 const searchResults = await page.$("div#search");11 const searchResultsChild = await searchResults.forEachChild((locator) => {12 locator;13 });14 console.log(searchResultsChild);15});

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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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