How to use createASTElement method in Playwright Internal

Best JavaScript code snippet using playwright-internal

parse.js

Source: parse.js Github

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1let template = "";2parseHTML(template, {3 start(tag, attrs, unary) {4 /​/​ 每当解析到标签开始位置时,触发该函数5 createASTElement(tag, attrs, currentParent);6 },7 end(tag, attrs, unary) {8 /​/​ 每当解析到标签结束位置时,触发该函数9 },10 chars(text) {11 /​/​ 每当解析到文本时,触发该函数12 },13 comment(text) {14 /​/​ 每当解析到注释时,触发该函数15 }16});17function createASTElement(tag, attrs, parent) {18 return {19 type: 1,20 tag,21 attrsList: attrs,22 parent,23 children: []24 };25}26/​/​ 工具函数27function advance(n) {28 index += n;29 html = html.substring(n);30}31/​/​ ### parse 整体流程伪代码32/​/​ 用到的正则表达式33const attribute = /​^\s*([^\s"'<>\/​=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/​;34const ncname = "[a-zA-Z_][\\w\\-\\.]*";35const qnameCapture = `((?:${ncname}\\:)?${ncname})`;36const startTagOpen = new RegExp(`^<${qnameCapture}`);37const startTagClose = /​^\s*(\/​?)>/​;38const endTag = new RegExp(`^<\\/​${qnameCapture}[^>]*>`);39const doctype = /​^<!DOCTYPE [^>]+>/​i;40const comment = /​^<!\--/​;41const conditionalComment = /​^<!\[/​;42export function parse(43 template: string,44 options: CompilerOptions45): ASTElement | void {46 getFnsAndConfigFromOptions(options);47 parseHTML(template, {48 /​/​ options ...49 start(tag, attrs, unary) {50 let element = createASTElement(tag, attrs);51 processElement(element);52 treeManagement();53 },54 end() {55 treeManagement();56 closeElement();57 },58 chars(text: string) {59 handleText();60 createChildrenASTOfText();61 },62 comment(text: string) {63 createChildrenASTOfComment();64 }65 });66 return astRootElement;67}68/​/​ closeElement 逻辑很简单,就是更新一下 inVPre 和 inPre 的状态,以及执行 postTransforms 函数,这些暂时都不必了解69function closeElement(element) {70 /​/​ check pre state71 if (element.pre) {72 inVPre = false;73 }74 if (platformIsPreTag(element.tag)) {75 inPre = false;76 }77 /​/​ apply post-transforms78 for (let i = 0; i < postTransforms.length; i++) {79 postTransforms[i](element, options);80 }81}82function advance (n) {83 index += n84 html = html.substring(n)85}86/​/​ ----------------------------------------------------------------------------------87/​/​ #### 文本解析器部分88export function parse(89 template: string,90 options: CompilerOptions91): ASTElement | void {92 getFnsAndConfigFromOptions(options);93 parseHTML(template, {94 /​/​ options ...95 start(tag, attrs, unary) {96 let element = createASTElement(tag, attrs);97 processElement(element);98 treeManagement();99 },100 end() {101 treeManagement();102 closeElement();103 },104 chars(text: string) {105 /​/​ handleText()106 /​/​ createChildrenASTOfText()107 /​/​ 实现伪代码108 text = text.trim();109 if (text) {110 const children = currentParent.children;...

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parser.js

Source: parser.js Github

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...37 }38 function start (tagName, attrs) {39 /​/​ 开始标签,每次解析开始标签,都会执行此方法。40 /​/​ console.log(tagName, attrs);41 const element = createASTElement(tagName, attrs)42 if (!root) {43 root = element44 }45 currentParent = element46 stack.push(element)47 }48 function end (tagName) {49 /​/​ 确立父子关系;50 /​/​ console.log(tagName);51 const element = stack.pop()52 currentParent = stack[stack.length - 1]53 if (element.tag !== tagName) {54 throw new Error(`${tagName} tag is not closed`)55 }...

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astParser.js

Source: astParser.js Github

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...78 }79 function start(tagName, attrs) {80 console.log("--->", "开始");81 console.log("--->", tagName, attrs);82 const element = createASTElement(tagName, attrs);83 console.log("element--->", element);84 if (!root) {85 root = element;86 }87 currentParent = element;88 stack.push(element);89 }90 function end(tagName) {91 console.log("--->", "结束");92 console.log("--->", tagName);93 const element = stack.pop();94 currentParent = stack[stack.length - 1];95 if (currentParent) {96 element.parent = currentParent;97 currentParent.children.push(element);98 }99 }100 function chars(text) {101 text = text.trim();102 if (text.length > 0) {103 currentParent.children.push({104 type: 3,105 text,106 });107 }108 console.log("--->", "文本");109 console.log("--->", text);110 }111 function createASTElement(tagName, attrs) {112 return {113 tag: tagName,114 type: 1,115 children: [],116 attrs,117 parent,118 };119 }120 console.log("--->", root);121 return root;122}123export function createASTElement(tagName, attrs) {124 return {125 tage: tagName,126 };...

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asrParser.js

Source: asrParser.js Github

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...70 function advance(n) {71 html = html.substring(n);72 }73 function start(tagName, attrs) {74 const element = createASTElement(tagName, attrs);75 if (!root) {76 root = element;77 }78 currentParent = element;79 stack.push(element);80 }81 function end(tagName) {82 const element = stack.pop();83 currentParent = stack[stack.length - 1];84 if (currentParent) {85 element.parent = currentParent;86 currentParent.children.push(element);87 }88 }89 function chars(text) {90 text = text.trim();91 if (text.length > 0) {92 currentParent.children.push({93 type: 3,94 text95 })96 }97 }98 function createASTElement(tagName, attrs) {99 return {100 tag: tagName,101 type: 1,102 children: [],103 attrs,104 parent105 }106 }107 return root;...

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model.js

Source: model.js Github

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...69 }70 }71}72function cloneASTElement (el) {73 return createASTElement(el.tag, el.attrsList.slice(), el.parent)74}75export default {76 preTransformNode...

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ast.js

Source: ast.js Github

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...5var currentParent;6var stack = []7function start(tag, attrs, unary, start, end) {8 /​/​在每次初始化的时候就把上一次的元素作为父元素9 var element = createASTElement(tag, attrs, currentParent)10 11 element.attrList.forEach(function(attr){12 element.rawAttrsMap[attr.name] = attr13 })14 console.log(element)15 processFor(element)16 processIf(element)17 /​/​ todo processOnce18 if(!root){19 root = element20 }21 if(!unary){22 currentParent = element23 stack.push(element)...

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index.js

Source: index.js Github

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...5 * @param {*} tag 标签名6 * @param {*} attrs 节点属性7 * @param {*} parent 当前节点的父节点8 */​9export function createASTElement(tag, attrs, parent) {10 return {11 type:1,12 tag,13 attrsList:attrs,14 parent,15 children:[]16 }17}18export function parse(template, options) {19 let ast = {}20 let currentParent21 22 parseHtml(template, {23 isUnaryTag:true, /​/​ 是否是自闭和标签24 start(tag, attrs, unary, start, end) {25 let element = createASTElement(tag, attrs, currentParent)26 },27 end() {},28 chars() {},29 comment() {}30 })31 return ast ...

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createASTElement.js

Source: createASTElement.js Github

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1/​/​将数组形式的attribute转换为map,即key-value形式2/​/​todo 在源码中有检验属性是否重复定义的逻辑3function makeAttrsMap (attrs) {4 var map = {}5 var len = attrs.length;6 for(var i = 0; i < len; i++){7 map[attrs[i].name] = attrs[i].value8 }9 return map10}11/​/​定义AST基本结构12function createASTElement (tag, attrs, parent) {13 return {14 type: 1,15 tag,16 attrList: attrs,17 attrsMap: makeAttrsMap(attrs),18 rawAttrsMap: {},19 parent,20 children: []21 }22}...

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Using AI Code Generation

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1const { createASTElement } = require('playwright/​lib/​server/​dom.js');2const { parse } = require('playwright/​lib/​server/​common/​html.js');3const { parseSelector } = require('playwright/​lib/​server/​common/​selectors2.js');4const { createAttributeSelector } = require('playwright/​lib/​server/​common/​selectors2.js');5const { createTextSelector } = require('playwright/​lib/​server/​common/​selectors2.js');6const { createSelector } = require('playwright/​lib/​server/​common/​selectors2.js');7const { createEngine } = require('playwright/​lib/​server/​common/​selectors2.js');8const { createEngineWithSource } = require('playwright/​lib/​server/​common/​selectors2.js');9const { createEngineWithSourceAndSelector } = require('playwright/​lib/​server/​common/​selectors2.js');10const { createEngineWithSourceAndSelectors } = require('playwright/​lib/​server/​common/​selectors2.js');11const { createEngineWithSelector } = require('playwright/​lib/​server/​common/​selectors2.js');12const { createEngineWithSelectors } = require('playwright/​lib/​server/​common/​selectors2.js');13const { createEngineWithSourceAndSelectorAndFilters } = require('playwright/​lib/​server/​common/​selectors2.js');14const { createEngineWithSourceAndSelectorsAndFilters } = require('playwright/​lib/​server/​common/​selectors2.js');15const { createEngineWithSelectorAndFilters } = require('playwright/​lib/​server/​common/​selectors2.js');16const { createEngineWithSelectorsAndFilters } = require('playwright/​lib/​server/​common/​selectors2.js');17const { createEngineWithSourceAndSelectorAndFiltersAndRoot } = require('playwright/​lib/​server/​common/​selectors2.js');18const { createEngineWithSourceAndSelectorsAndFiltersAndRoot } = require('playwright/​lib/​server/​common/​selectors2.js');19const { createEngineWithSelectorAndFiltersAndRoot } = require('playwright/​lib/​server/​common/​selectors2.js');20const { createEngineWithSelectorsAndFiltersAndRoot } = require('playwright/​lib/​server/​common/​selectors2.js');21const { createEngineWithSourceAndSelectorAndFiltersAndRootAndText } = require('playwright/​lib/​server/​common/​selectors2.js');22const { createEngineWithSourceAndSelectorsAndFiltersAndRootAndText } = require('playwright/​lib/​server/​common/​selectors2.js');23const { createEngineWithSelectorAndFiltersAndRootAndText } = require('playwright/​lib/​server/​common/​select

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Using AI Code Generation

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1const { createASTElement } = require('playwright/​lib/​server/​dom.js');2const { parse } = require('playwright/​lib/​server/​inspector/​inspector.js');3const { htmlToAst } = require('playwright/​lib/​server/​inspector/​ast.js');4const { serialize } = require('playwright/​lib/​server/​inspector/​inspector.js');5const { parseHTML } = require('playwright/​lib/​server/​inspector/​ast.js');6const { createHTML } = require('playwright/​lib/​server/​inspector/​ast.js');7const html = '<div><h1>Test</​h1><div><h2>Test2</​h2></​div></​div>';8const ast = htmlToAst(html);9const html2 = createHTML(ast);10const html3 = '<div><h1>Test</​h1><div><h2>Test2</​h2></​div></​div>';11const ast2 = parseHTML(html3);12const html4 = serialize(ast2);13const html5 = '<div><h1>Test</​h1><div><h2>Test2</​h2></​div></​div>';14const ast3 = parse(html5);15const html6 = serialize(ast3);16const element = createASTElement('div', [], []);17const element2 = createASTElement('div', [], [], 'test');18const element3 = createASTElement('div', [], [], 'test', 'test');19const element4 = createASTElement('div', [], [], 'test', 'test', 'test');

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Using AI Code Generation

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1const { createASTElement } = require('playwright/​internal');2const elementHandle = await page.$('button');3const { name, attributes } = await createASTElement(elementHandle);4console.log(name, attributes);5const { createASTElement } = require('playwright');6const elementHandle = await page.$('button');7const { name, attributes } = await createASTElement(elementHandle);8console.log(name, attributes);9const { createASTElement } = require('playwright');10const elementHandle = await page.$('button');11const { name, attributes } = await createASTElement(elementHandle);12console.log(name, attributes);13const { createASTElement } = require('playwright');14const elementHandle = await page.$('button');15const { name, attributes } = await createASTElement(elementHandle);16console.log(name, attributes);17const { createASTElement } = require('playwright');18const elementHandle = await page.$('button');19const { name, attributes } = await createASTElement(elementHandle);20console.log(name, attributes);21const { createASTElement } = require('playwright');22const elementHandle = await page.$('button');23const { name, attributes } = await createASTElement(elementHandle);24console.log(name, attributes);

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Using AI Code Generation

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1const { createASTElement } = require('playwright/​lib/​server/​common/​ast');2const astElement = createASTElement('div', {id: 'myid', style: 'color: red;'});3console.log(astElement);4const { createASTElement } = require('playwright/​lib/​server/​common/​ast');5const astElement = createASTElement('div', {id: 'myid', style: 'color: red;'});6console.log(astElement);7import { createASTElement } from 'playwright/​lib/​server/​common/​ast';8const astElement = createASTElement('div', {id: 'myid', style: 'color: red;'});9console.log(astElement);10{11 attributes: { id: 'myid', style: 'color: red;' },12}

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Using AI Code Generation

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1const { createASTElement } = require('playwright/​lib/​server/​dom');2const element = createASTElement('div', {3 attributes: { 'data-attr': 'attr' },4 createASTElement('span', {5 attributes: { 'data-span': 'span' },6 }),7});8const { createPage } = require('playwright/​lib/​server/​chromium');9const page = createPage(browserContext, null, null, null);10const { createFrame } = require('playwright/​lib/​server/​frames');11const frame = createFrame(page, element, 'frameId', 'frameName');12const { createJSHandle } = require('playwright/​lib/​server/​frames');13const jsHandle = createJSHandle(frame, element);14const { createHandle } = require('playwright/​lib/​server/​frames');15const handle = createHandle(jsHandle);16const { createInstrumentation } = require('playwright/​lib/​server/​instrumentation');17const instrumentation = createInstrumentation();18const { createNetworkManager } = require('playwright/​lib/​server/​network');19const networkManager = createNetworkManager(page, instrumentation);20const { createBrowserServer } = require('playwright/​lib/​server/​browserServer');21const browserServer = createBrowserServer(browser);22const { createBrowserContext } = require('playwright/​lib/​server/​browserContext');23const browserContext = createBrowserContext(browser, null, null, null);

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Using AI Code Generation

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1const { createASTElement } = require('playwright/​lib/​client/​selectorEngine');2const element = createASTElement('css=div', 'css');3console.log(element);4const { createAST } = require('playwright/​lib/​client/​selectorEngine');5const element = createAST('css=div');6console.log(element);7const { createEngine } = require('playwright/​lib/​client/​selectorEngine');8const engine = createEngine('css');9console.log(engine);10const { createEngines } = require('playwright/​lib/​client/​selectorEngine');11const engines = createEngines();12console.log(engines);

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Using AI Code Generation

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1const {createASTElement} = require('playwright/​lib/​server/​dom.js');2const astElement = createASTElement('selector');3console.log(astElement);4const {createSelector} = require('playwright/​lib/​server/​dom.js');5const selector = createSelector(astElement);6console.log(selector);7const {createXPath} = require('playwright/​lib/​server/​dom.js');8const xpath = createXPath(astElement);9console.log(xpath);10const {parseSelector} = require('playwright/​lib/​server/​dom.js');11const parsedSelector = parseSelector('selector');12console.log(parsedSelector);13const {querySelectorAll} = require('playwright/​lib/​server/​dom.js');14const elements = querySelectorAll('selector');15console.log(elements);16const {querySelector} = require('playwright/​lib/​server/​dom.js');17const element = querySelector('selector');18console.log(element);19const {queryXPath} = require('playwright/​lib/​server/​dom.js');20const element = queryXPath('xpath');21console.log(element);22const {waitForSelectorInPage} = require('playwright/​lib/​server/​dom.js');23const element = waitForSelectorInPage('selector');24console.log(element);25const {waitForXPathInPage} = require('playwright/​lib/​server/​dom.js');26const element = waitForXPathInPage('xpath');27console.log(element);28const {waitForSelectorInFrame} = require('playwright/​lib/​server/​dom.js');

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Using AI Code Generation

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1import { createASTElement } from 'playwright' 2const element = createASTElement('div', {id: 'test'}, 'hello')3console.log(element)4I have been trying to use the createASTElement method of Playwright Internal API to create a new element in the DOM. However, when I try to run the code, I get the following error:This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createASTElement' of undefined". I have tried to import the createASTElement method in different ways. This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createASTElement' of undefined". I have tried to import the createASTElement method in different ways. This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createASTElement' of undefined". I have tried to import the createASTElement method in different ways. This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createASTElement' of undefined". I have tried to import the createASTElement method in different ways. This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createASTElement' of undefined". I have tried to import the createASTElement method in different ways. This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createASTElement' of undefined". I have tried to import the createASTElement method in different ways. This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createASTElement' of undefined". I have tried to import the createASTElement method in different ways. This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createAST5const elements = querySelectorAll('selector');6console.log(elements);7const {querySelector} = require('playwright/​lib/​server/​dom.js');8const element = querySelector('selector');9console.log(element);10const {queryXPath} = require('playwright/​lib/​server/​dom.js');11const element = queryXPath('xpath');12console.log(element);13const {waitForSelectorInPage} = require('playwright/​lib/​server/​dom.js');14const element = waitForSelectorInPage('selector');15console.log(element);16const {waitForXPathInPage} = require('playwright/​lib/​server/​dom.js');17const element = waitForXPathInPage('xpath');18console.log(element);19const {waitForSelectorInFrame} = require('playwright/​lib/​server/​dom.js');

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Using AI Code Generation

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1import { createASTElement } from 'playwright' 2const element = createASTElement('div', {id: 'test'}, 'hello')3console.log(element)4I have been trying to use the createASTElement method of Playwright Internal API to create a new element in the DOM. However, when I try to run the code, I get the following error:This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createASTElement' of undefined". I have tried to import the createASTElement method in different ways. This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createASTElement' of undefined". I have tried to import the createASTElement method in different ways. This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createASTElement' of undefined". I have tried to import the createASTElement method in different ways. This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createASTElement' of undefined". I have tried to import the createASTElement method in different ways. This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createASTElement' of undefined". I have tried to import the createASTElement method in different ways. This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createASTElement' of undefined". I have tried to import the createASTElement method in different ways. This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createASTElement' of undefined". I have tried to import the createASTElement method in different ways. This is the code I am using:When I run the code in the browser, I get the error: "Cannot read property 'createAST5const {querySelector} = require('playwright/​lib/​server/​dom.js');6const element = querySelector('selector');7console.log(element);8const {queryXPath} = require('playwright/​lib/​server/​dom.js');9const element = queryXPath('xpath');10console.log(element);11const {waitForSelectorInPage} = require('playwright/​lib/​server/​dom.js');12const element = waitForSelectorInPage('selector');13console.log(element);14const {waitForXPathInPage} = require('playwright/​lib/​server/​dom.js');15const element = waitForXPathInPage('xpath');16console.log(element);17const {waitForSelectorInFrame} = require('playwright/​lib/​server/​dom.js');18const { createEngines } = require('playwright/​lib/​client/​selectorEngine');19const engines = createEngines();20console.log(engines);

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Using AI Code Generation

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1const {createASTElement} = require('playwright/​lib/​server/​dom.js');2const astElement = createASTElement('selector');3console.log(astElement);4const {createSelector} = require('playwright/​lib/​server/​dom.js');5const selector = createSelector(astElement);6console.log(selector);7const {createXPath} = require('playwright/​lib/​server/​dom.js');8const xpath = createXPath(astElement);9console.log(xpath);10const {parseSelector} = require('playwright/​lib/​server/​dom.js');11const parsedSelector = parseSelector('selector');12console.log(parsedSelector);13const {querySelectorAll} = require('playwright/​lib/​server/​dom.js');14const elements = querySelectorAll('selector');15console.log(elements);16const {querySelector} = require('playwright/​lib/​server/​dom.js');17const element = querySelector('selector');18console.log(element);19const {queryXPath} = require('playwright/​lib/​server/​dom.js');20const element = queryXPath('xpath');21console.log(element);22const {waitForSelectorInPage} = require('playwright/​lib/​server/​dom.js');23const element = waitForSelectorInPage('selector');24console.log(element);25const {waitForXPathInPage} = require('playwright/​lib/​server/​dom.js');26const element = waitForXPathInPage('xpath');27console.log(element);28const {waitForSelectorInFrame} = require('playwright/​lib/​server/​dom.js');

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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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  7. 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.
  8. 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.
  9. 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.
  10. 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.
  11. 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.
  12. Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.

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