KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta 
How to use createElementTypeChecker method in Playwright Internal
Best JavaScript code snippet using playwright-internal
ReactPropTypes.js
Source:ReactPropTypes.js 
...13 object: createPrimitiveTypeChecker('object'),14 string: createPrimitiveTypeChecker('string'),15 any: createAnyTypeChecker(),16 arrayOf: createArrayOfTypeChecker,17 element: createElementTypeChecker(),18 instanceOf: createInstanceTypeChecker,19 node: createNodeChecker(),20 objectOf: createObjectOfTypeChecker,21 oneOf: createEnumTypeChecker,22 oneOfType: createUnionTypeChecker,23 shape: createShapeTypeChecker24};25function createChainableTypeChecker(validate) {26 function checkType(isRequired, props, propName, componentName, location, propFullName) {27 componentName = componentName || ANONYMOUS;28 propFullName = propFullName || propName;29 if (props[propName] == null) {30 var locationName = ReactPropTypeLocationNames[location];31 if (isRequired) {32 return new Error('Required ' + locationName + ' `' + propFullName + '` was not specified in ' + ('`' + componentName + '`.'));33 }34 return null;35 } else {36 return validate(props, propName, componentName, location, propFullName);37 }38 }39 var chainedCheckType = checkType.bind(null, false);40 chainedCheckType.isRequired = checkType.bind(null, true);41 return chainedCheckType;42}43function createPrimitiveTypeChecker(expectedType) {44 function validate(props, propName, componentName, location, propFullName) {45 var propValue = props[propName];46 var propType = getPropType(propValue);47 if (propType !== expectedType) {48 var locationName = ReactPropTypeLocationNames[location];49 var preciseType = getPreciseType(propValue);50 return new Error('Invalid ' + locationName + ' `' + propFullName + '` of type ' + ('`' + preciseType + '` supplied to `' + componentName + '`, expected ') + ('`' + expectedType + '`.'));51 }52 return null;53 }54 return createChainableTypeChecker(validate);55}56function createAnyTypeChecker() {57 return createChainableTypeChecker(emptyFunction.thatReturns(null));58}59function createArrayOfTypeChecker(typeChecker) {60 function validate(props, propName, componentName, location, propFullName) {61 var propValue = props[propName];62 if (!Array.isArray(propValue)) {63 var locationName = ReactPropTypeLocationNames[location];64 var propType = getPropType(propValue);65 return new Error('Invalid ' + locationName + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected an array.'));66 }67 for (var i = 0; i < propValue.length; i++) {68 var error = typeChecker(propValue, i, componentName, location, propFullName + '[' + i + ']');69 if (error instanceof Error) {70 return error;71 }72 }73 return null;74 }75 return createChainableTypeChecker(validate);76}77function createElementTypeChecker() {78 function validate(props, propName, componentName, location, propFullName) {79 if (!ReactElement.isValidElement(props[propName])) {80 var locationName = ReactPropTypeLocationNames[location];81 return new Error('Invalid ' + locationName + ' `' + propFullName + '` supplied to ' + ('`' + componentName + '`, expected a single ReactElement.'));82 }83 return null;84 }85 return createChainableTypeChecker(validate);86}87function createInstanceTypeChecker(expectedClass) {88 function validate(props, propName, componentName, location, propFullName) {89 if (!(props[propName] instanceof expectedClass)) {90 var locationName = ReactPropTypeLocationNames[location];91 var expectedClassName = expectedClass.name || ANONYMOUS;...
propValidation.js
Source:propValidation.js
...10 string: createPrimitiveTypeChecker('string'),11 symbol: createPrimitiveTypeChecker('symbol'),12 any: createAnyTypeChecker(),13 arrayOf: createArrayOfTypeChecker,14 element: createElementTypeChecker(),15 instanceOf: createInstanceTypeChecker,16 objectOf: createObjectOfTypeChecker,17 oneOf: createEnumTypeChecker,18 oneOfType: createUnionTypeChecker,19 shape: createShapeTypeChecker,20};21// node: createNodeChecker(),22/*23* Primitive checker24*/25function createChainableTypeChecker(validate) {26 function checkType(isOptional, value) {27 if (value == null) {28 if (isOptional) {29 if (value === null) {30 return new Error(31 `The ${value} is marked as required, but its value is \`null\`.`32 );33 }34 return new Error(35 `The ${value} is marked as required, but its value is \`undefined\`.`36 );37 }38 return null;39 } else {40 return validate(value);41 }42 }43 const chainedCheckType = checkType.bind(null, false);44 chainedCheckType.isOptional = checkType.bind(null, true);45 return chainedCheckType;46}47function createPrimitiveTypeChecker(expectedType) {48 function validate(value) {49 const propType = getPropType(value);50 if (propType !== expectedType) {51 var preciseType = getPreciseType(value);52 return new Error(53 `Invalid type!`54 );55 }56 return null;57 }58 return createChainableTypeChecker(validate);59}60const getPropType = propValue => {61 var propType = typeof propValue62 if (Array.isArray(propValue)) {63 return 'array'64 } else if (propValue instanceof RegExp) {65 return 'object'66 } else if (isSymbol(propType, propValue)) {67 return 'symbol'68 }69 return propType70};71const getPreciseType = propValue => {72 var propType = getPropType(propValue)73 if (propType === 'object') {74 if (propValue instanceof Date) {75 return 'date'76 } else if (propValue instanceof RegExp) {77 return 'regexp'78 }79 }80 return propType81};82const isSymbol = (propType, propValue) => {83 if (propType === 'symbol' || 84 propValue['@@toStringTag'] === 'Symbol' || 85 typeof Symbol === 'function' && propValue instanceof Symbol86 ) {87 return true88 }89 return false90};91const getClassName = propValue =>92 !propValue.constructor || !propValue.constructor.name 93 ? ANONYMOUS94 : propValue.constructor.name95/*96* Other checkers97*/98function createAnyTypeChecker() {99 return createChainableTypeChecker(emptyFunction);100}101/*eslint-disable no-self-compare*/102function is(x, y) {103 // SameValue algorithm104 if (x === y) { // Steps 1-5, 7-10105 // Steps 6.b-6.e: +0 != -0106 return x !== 0 || 1 / x === 1 / y;107 } else {108 // Step 6.a: NaN == NaN109 return x !== x && y !== y;110 }111}112/*eslint-enable no-self-compare*/113function createArrayOfTypeChecker(typeChecker) {114 function validate(value) {115 if (typeof typeChecker !== 'function') {116 return new Error(117 `Property of component has invalid PropType notation inside arrayOf.`118 );119 }120 if (!Array.isArray(value)) {121 var propType = getPropType(value);122 return new Error(123 `Invalid of type supplied to , expected an array.`124 );125 }126 for (var i = 0; i < value.length; i++) {127 var error = typeChecker(value[i]);128 if (error instanceof Error) {129 return error;130 }131 }132 return null;133 }134 return createChainableTypeChecker(validate);135}136function createElementTypeChecker() {137 function validate(value) {138 if (!React.isValidElement(value)) {139 var propType = getPropType(value);140 return new Error(141 `Invalid of type supplied to, expected a single React.`142 );143 }144 return null;145 }146 return createChainableTypeChecker(validate);147}148function createInstanceTypeChecker(expectedClass) {149 function validate(value) {150 if (value instanceof expectedClass) {...
CustomPropTypes.js
Source:CustomPropTypes.js
...36 * @param propName37 * @param componentName38 * @returns {Error|undefined}39 */40 elementType: createElementTypeChecker(),41 /**42 * Checks whether a prop matches a key of an associated object43 *44 * @param props45 * @param propName46 * @param componentName47 * @returns {Error|undefined}48 */49 keyOf: createKeyOfChecker,50 /**51 * Checks if only one of the listed properties is in use. An error is given52 * if multiple have a value53 *54 * @param props55 * @param propName56 * @param componentName57 * @returns {Error|undefined}58 */59 singlePropFrom: createSinglePropFromChecker,60 all61};62function errMsg(props, propName, componentName, msgContinuation) {63 return `Invalid prop '${propName}' of value '${props[propName]}'` +64 ` supplied to '${componentName}'${msgContinuation}`;65}66/**67 * Create chain-able isRequired validator68 *69 * Largely copied directly from:70 * https://github.com/facebook/react/blob/0.11-stable/src/core/ReactPropTypes.js#L9471 */72function createChainableTypeChecker(validate) {73 function checkType(isRequired, props, propName, componentName) {74 componentName = componentName || ANONYMOUS;75 if (props[propName] == null) {76 if (isRequired) {77 return new Error(78 `Required prop '${propName}' was not specified in '${componentName}'.`79 );80 }81 } else {82 return validate(props, propName, componentName);83 }84 }85 let chainedCheckType = checkType.bind(null, false);86 chainedCheckType.isRequired = checkType.bind(null, true);87 return chainedCheckType;88}89function createMountableChecker() {90 function validate(props, propName, componentName) {91 if (typeof props[propName] !== 'object' ||92 typeof props[propName].render !== 'function' && props[propName].nodeType !== 1) {93 return new Error(94 errMsg(props, propName, componentName,95 ', expected a DOM element or an object that has a `render` method')96 );97 }98 }99 return createChainableTypeChecker(validate);100}101function createKeyOfChecker(obj) {102 function validate(props, propName, componentName) {103 let propValue = props[propName];104 if (!obj.hasOwnProperty(propValue)) {105 let valuesString = JSON.stringify(Object.keys(obj));106 return new Error(107 errMsg(props, propName, componentName, `, expected one of ${valuesString}.`)108 );109 }110 }111 return createChainableTypeChecker(validate);112}113function createSinglePropFromChecker(arrOfProps) {114 function validate(props, propName, componentName) {115 const usedPropCount = arrOfProps116 .map(listedProp => props[listedProp])117 .reduce((acc, curr) => acc + (curr !== undefined ? 1 : 0), 0);118 if (usedPropCount > 1) {119 const [first, ...others] = arrOfProps;120 const message = `${others.join(', ')} and ${first}`;121 return new Error(122 `Invalid prop '${propName}', only one of the following ` +123 `may be provided: ${message}`124 );125 }126 }127 return validate;128}129function all(propTypes) {130 if (propTypes === undefined) {131 throw new Error('No validations provided');132 }133 if (!(propTypes instanceof Array)) {134 throw new Error('Invalid argument must be an array');135 }136 if (propTypes.length === 0) {137 throw new Error('No validations provided');138 }139 return function(props, propName, componentName) {140 for(let i = 0; i < propTypes.length; i++) {141 let result = propTypes[i](props, propName, componentName);142 if (result !== undefined && result !== null) {143 return result;144 }145 }146 };147}148function createElementTypeChecker() {149 function validate(props, propName, componentName) {150 let errBeginning = errMsg(props, propName, componentName,151 '. Expected an Element `type`');152 if (typeof props[propName] !== 'function') {153 if (React.isValidElement(props[propName])) {154 return new Error(errBeginning + ', not an actual Element');155 }156 if (typeof props[propName] !== 'string') {157 return new Error(errBeginning +158 ' such as a tag name or return value of React.createClass(...)');159 }160 }161 }162 return createChainableTypeChecker(validate);...
Using AI Code Generation
1const { createElementTypeChecker } = require('@playwright/test/lib/server/frames');2const { Frame } = require('@playwright/test/lib/server/frames');3const { ElementHandle } = require('@playwright/test/lib/server/dom');4const { JSHandle } = require('@playwright/test/lib/server/jsHandle');5const frame = new Frame();6const elementHandle = new ElementHandle();7const jsHandle = new JSHandle();8const typeCheck = createElementTypeChecker('frame', Frame);9console.log(typeCheck(frame));10const typeCheck1 = createElementTypeChecker('elementHandle', ElementHandle);11console.log(typeCheck1(elementHandle));12const typeCheck2 = createElementTypeChecker('jsHandle', JSHandle);13console.log(typeCheck2(jsHandle));14const typeCheck3 = createElementTypeChecker('frame', ElementHandle);15console.log(typeCheck3(frame));16const typeCheck4 = createElementTypeChecker('elementHandle', JSHandle);17console.log(typeCheck4(elementHandle));18const typeCheck5 = createElementTypeChecker('jsHandle', Frame);19console.log(typeCheck5(jsHandle));
Using AI Code Generation
1const { createElementTypeChecker } = require('playwright/lib/server/frames');2const { Frame } = require('playwright/lib/server/frames');3const { ElementHandle } = require('playwright/lib/server/frames');4const { JSHandle } = require('playwright/lib/server/frames');5const { JSHandlePreview } = require('playwright/lib/server/frames');6const { JSHandlePreviewFactory } = require('playwright/lib/server/frames');7const { ElementHandlePreview } = require('playwright/lib/server/frames');8const { ElementHandlePreviewFactory } = require('playwright/lib/server/frames');9const { ElementHandleFactory } = require('playwright/lib/server/frames');10const { FrameFactory } = require('playwright/lib/server/frames');11const frame = new Frame();12const elementHandle = new ElementHandle();13const jsHandle = new JSHandle();14const jsHandlePreview = new JSHandlePreview();15const jsHandlePreviewFactory = new JSHandlePreviewFactory();16const elementHandlePreview = new ElementHandlePreview();17const elementHandlePreviewFactory = new ElementHandlePreviewFactory();18const elementHandleFactory = new ElementHandleFactory();19const frameFactory = new FrameFactory();20const checker = createElementTypeChecker('elementHandle', 'ElementHandle', (handle) => {21 return handle instanceof ElementHandle;22}, (handle) => {23 return elementHandleFactory._fromHandle(handle);24}, (handle) => {25 return elementHandlePreviewFactory._fromHandle(handle);26}, (handle) => {27 return handle._preview;28}, (preview) => {29 return elementHandlePreviewFactory._fromPreview(preview);30}, (preview) => {31 return elementHandleFactory._fromPreview(preview);32}, (preview) => {33 return elementHandlePreviewFactory._elementHandleForPreview(preview);34}, (preview) => {35 return elementHandleFactory._elementHandleForPreview(preview);36}, (handle) => {37 return handle._context;38}, (handle) => {39 return handle._context.frame;40}, (preview) => {41 return frameFactory._fromPreview(preview);42}, (preview) => {43 return frameFactory._frameForPreview(preview);44}, (preview) => {45 return jsHandlePreviewFactory._fromPreview(preview);46}, (preview) => {47 return jsHandleFactory._fromPreview(preview);48}, (preview) => {49 return jsHandlePreviewFactory._jsHandleForPreview(p
Using AI Code Generation
1const { createElementTypeChecker } = require('playwright/lib/server/common/JSHandle');2const { ElementHandle } = require('playwright/lib/server/dom/ElementHandle');3const elementHandle = new ElementHandle();4const elementTypeChecker = createElementTypeChecker('ElementHandle');5console.log(elementTypeChecker(elementHandle));6const { createElementTypeChecker } = require('playwright/lib/server/common/JSHandle');7const { ElementHandle } = require('playwright/lib/server/dom/ElementHandle');8const elementHandle = new ElementHandle();9const elementTypeChecker = createElementTypeChecker('ElementHandle');10console.log(elementTypeChecker(elementHandle));11const { createElementTypeChecker } = require('playwright/lib/server/common/JSHandle');12const { ElementHandle } = require('playwright/lib/server/dom/ElementHandle');13const elementHandle = new ElementHandle();14const elementTypeChecker = createElementTypeChecker('ElementHandle');15console.log(elementTypeChecker(elementHandle));16const { createElementTypeChecker } = require('playwright/lib/server/common/JSHandle');17const { ElementHandle } = require('playwright/lib/server/dom/ElementHandle');18const elementHandle = new ElementHandle();19const elementTypeChecker = createElementTypeChecker('ElementHandle');20console.log(elementTypeChecker(elementHandle));21const { createElementTypeChecker } = require('playwright/lib/server/common/JSHandle');22const { ElementHandle } = require('playwright/lib/server/dom/ElementHandle');23const elementHandle = new ElementHandle();24const elementTypeChecker = createElementTypeChecker('ElementHandle');25console.log(elementTypeChecker(elementHandle));26const { createElementTypeChecker } = require('playwright/lib/server/common/JSHandle');27const { ElementHandle } = require('playwright/lib/server/dom/ElementHandle');28const elementHandle = new ElementHandle();29const elementTypeChecker = createElementTypeChecker('ElementHandle');30console.log(elementTypeChecker(elementHandle));
Using AI Code Generation
1const { createElementTypeChecker } = require('@playwright/test/lib/server/frames');2const { test } = require('@playwright/test');3test('test', async ({ page }) => {4 const elementHandle = await page.$('body');5 const checker = createElementTypeChecker(['HTMLElement', 'SVGElement']);6 const result = checker(elementHandle);7 console.log(result);8});9const { createElementTypeChecker } = require('@playwright/test/lib/server/frames');10const { test } = require('@playwright/test');11test('test', async ({ page }) => {12 const elementHandle = await page.$('body');13 const checker = createElementTypeChecker(['HTMLImageElement', 'SVGElement']);14 const result = checker(elementHandle);15 console.log(result);16});
Using AI Code Generation
1const { createElementTypeChecker } = require('@playwright/test/lib/utils/elementHandleDispatcher');2const { chromium } = require('playwright');3const { test } = require('@playwright/test');4test('should pass', async ({ page }) => {5 const elementHandle = await page.$('text=Get started');6 const isElementHandle = createElementTypeChecker('ElementHandle');7 console.log(isElementHandle(elementHandle));8});9test('should fail', async ({ page }) => {10 const elementHandle = await page.$('text=Get started');11 const isElementHandle = createElementTypeChecker('ElementHandle');12 console.log(isElementHandle(elementHandle));13});
Using AI Code Generation
1const { createElementTypeChecker } = require('playwright/lib/server/dom.js');2const { assert } = require('chai');3const { JSDOM } = require('jsdom');4const { window } = new JSDOM();5const { document } = window;6const element = document.createElement('div');7const element2 = document.createElement('p');8const elementChecker = createElementTypeChecker('div');9const elementChecker2 = createElementTypeChecker('p');10const { createElementTypeChecker } = require('playwright/lib/server/dom.js');11const { assert } = require('chai');12const { JSDOM } = require('jsdom');13const { window } = new JSDOM();14const { document } = window;15const element = document.createElement('div');16const element2 = document.createElement('p');17const elementChecker = createElementTypeChecker('div');18assert.equal(elementChecker(element), true);19assert.equal(elementChecker(element2), false);20const elementChecker2 = createElementTypeChecker('p');21assert.equal(elementChecker2(element), false);22assert.equal(elementChecker2(element2), true);
Using AI Code Generation
1const { createElementTypeChecker } = require('playwright-core/lib/server/common/JSHandle.js');2const { ElementHandle } = require('playwright-core/lib/server/dom.js');3const { Page } = require('playwright-core/lib/server/page.js');4const customElementChecker = createElementTypeChecker('custom', (value) => {5 return value === 'custom';6});7const page = new Page(null, null, null);8const customElementHandle = new ElementHandle(page, customElementChecker, 'custom', null);9console.log(await customElementHandle.evaluate(element => element));10const customElementHandle2 = await customElementHandle.$('custom');11console.log(await customElementHandle2.evaluate(element => element));12Error: Protocol error (Runtime.callFunctionOn): Cannot find context with specified id undefined13Error: Protocol error (Runtime.callFunctionOn): Cannot find context with specified id undefined14Error: Protocol error (Runtime.callFunctionOn): Cannot find context with specified id undefined
Using AI Code Generation
1const { createElementTypeChecker } = require('@playwright/test/lib/server/frames');2const frame = page.mainFrame();3const element = frame.querySelector('button');4const isButton = createElementTypeChecker('button');5const isInput = createElementTypeChecker('input');6const { createElementTypeChecker } = require('@playwright/test/lib/server/frames');7const frame = page.mainFrame();8const element = frame.querySelector('button');9const isButton = createElementTypeChecker('button');10const isInput = createElementTypeChecker('input');11const { createElementTypeChecker } = require('@playwright/test/lib/server/frames');12const frame = page.mainFrame();13const element = frame.querySelector('button');14const isButton = createElementTypeChecker('button');15const isInput = createElementTypeChecker('input');16const { createElementTypeChecker } = require('@playwright/test/lib/server/frames');17const frame = page.mainFrame();18const element = frame.querySelector('button');19const isButton = createElementTypeChecker('button');20const isInput = createElementTypeChecker('input');21const { createElementTypeChecker } = require('@playwright/test/lib/server/frames');22const frame = page.mainFrame();23const element = frame.querySelector('button');24const isButton = createElementTypeChecker('button');25const isInput = createElementTypeChecker('input');26const { createElementTypeChecker } = require('@playwright/test/lib/server/frames');27const frame = page.mainFrame();28const element = frame.querySelector('button');29const isButton = createElementTypeChecker('button');
Using AI Code Generation
1const { createElementTypeChecker } = require('playwright/lib/server/dom.js');2const isHTML = createElementTypeChecker('HTML');3const isButton = createElementTypeChecker('Button');4const isDiv = createElementTypeChecker('Div');5const isSpan = createElementTypeChecker('Span');6const isAnchor = createElementTypeChecker('Anchor');7const isTextArea = createElementTypeChecker('TextArea');8const isInput = createElementTypeChecker('Input');9const isLabel = createElementTypeChecker('Label');10const isSelect = createElementTypeChecker('Select');11const isOption = createElementTypeChecker('Option');12const isTable = createElementTypeChecker('Table');13const isTableRow = createElementTypeChecker('TableRow');14const isTableCell = createElementTypeChecker('TableCell');15const isList = createElementTypeChecker('List');16const isListItem = createElementTypeChecker('ListItem');17const isOrderedList = createElementTypeChecker('OrderedList');18const isUnorderedList = createElementTypeChecker('UnorderedList');19const isImage = createElementTypeChecker('Image');20const isParagraph = createElementTypeChecker('Paragraph');
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?
