How to use getRealChild method in Playwright Internal

Best JavaScript code snippet using playwright-internal

transition.js

Source: transition.js Github

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...29/​/​ we want to recursively retrieve the real component to be rendered30function getRealChild (vnode: ?VNode): ?VNode {31 const compOptions: ?VNodeComponentOptions = vnode && vnode.componentOptions32 if (compOptions && compOptions.Ctor.options.abstract) {33 return getRealChild(getFirstComponentChild(compOptions.children))34 } else {35 return vnode36 }37}38export function extractTransitionData (comp: Component): Object {39 const data = {}40 const options: ComponentOptions = comp.$options41 /​/​ props42 for (const key in options.propsData) {43 data[key] = comp[key]44 }45 /​/​ events.46 /​/​ extract listeners and pass them directly to the transition methods47 const listeners: ?Object = options._parentListeners48 for (const key in listeners) {49 data[camelize(key)] = listeners[key]50 }51 return data52}53function placeholder (h: Function, rawChild: VNode): ?VNode {54 if (/​\d-keep-alive$/​.test(rawChild.tag)) {55 return h('keep-alive', {56 props: rawChild.componentOptions.propsData57 })58 }59}60function hasParentTransition (vnode: VNode): ?boolean {61 while ((vnode = vnode.parent)) {62 if (vnode.data.transition) {63 return true64 }65 }66}67function isSameChild (child: VNode, oldChild: VNode): boolean {68 return oldChild.key === child.key && oldChild.tag === child.tag69}70const isNotTextNode = (c: VNode) => c.tag || isAsyncPlaceholder(c)71const isVShowDirective = d => d.name === 'show'72export default {73 name: 'transition',74 props: transitionProps,75 abstract: true,76 render (h: Function) {77 let children: any = this.$slots.default78 if (!children) {79 return80 }81 /​/​ filter out text nodes (possible whitespaces)82 children = children.filter(isNotTextNode)83 /​* istanbul ignore if */​84 if (!children.length) {85 return86 }87 /​/​ warn multiple elements88 if (process.env.NODE_ENV !== 'production' && children.length > 1) {89 warn(90 '<transition> can only be used on a single element. Use ' +91 '<transition-group> for lists.',92 this.$parent93 )94 }95 const mode: string = this.mode96 /​/​ warn invalid mode97 if (process.env.NODE_ENV !== 'production' &&98 mode && mode !== 'in-out' && mode !== 'out-in'99 ) {100 warn(101 'invalid <transition> mode: ' + mode,102 this.$parent103 )104 }105 const rawChild: VNode = children[0]106 /​/​ if this is a component root node and the component's107 /​/​ parent container node also has transition, skip.108 if (hasParentTransition(this.$vnode)) {109 return rawChild110 }111 /​/​ apply transition data to child112 /​/​ use getRealChild() to ignore abstract components e.g. keep-alive113 const child: ?VNode = getRealChild(rawChild)114 /​* istanbul ignore if */​115 if (!child) {116 return rawChild117 }118 if (this._leaving) {119 return placeholder(h, rawChild)120 }121 /​/​ ensure a key that is unique to the vnode type and to this transition122 /​/​ component instance. This key will be used to remove pending leaving nodes123 /​/​ during entering.124 const id: string = `__transition-${this._uid}-`125 child.key = child.key == null126 ? child.isComment127 ? id + 'comment'128 : id + child.tag129 : isPrimitive(child.key)130 ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)131 : child.key132 const data: Object = (child.data || (child.data = {})).transition = extractTransitionData(this)133 const oldRawChild: VNode = this._vnode134 const oldChild: VNode = getRealChild(oldRawChild)135 /​/​ mark v-show136 /​/​ so that the transition module can hand over the control to the directive137 if (child.data.directives && child.data.directives.some(isVShowDirective)) {138 child.data.show = true139 }140 if (141 oldChild &&142 oldChild.data &&143 !isSameChild(child, oldChild) &&144 !isAsyncPlaceholder(oldChild) &&145 /​/​ #6687 component root is a comment node146 !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)147 ) {148 /​/​ replace old child transition data with fresh one...

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Using AI Code Generation

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1const { getRealChild } = require('playwright/​lib/​client/​selectorEngine');2const { chromium } = require('playwright');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 const realChild = await getRealChild(elementHandle);8 console.log(realChild);9 await browser.close();10})();11ElementHandle {12 _channel: Channel {13 _callbacks: Map(0) {},14 _connection: Connection {15 },16 _connectionPromise: Promise { <pending> },17 _promise: Promise { <pending> }18 },19 _initializer: {20 },21 _page: Page {22 _browserContext: BrowserContext {23 },24 _channel: Channel {25 },

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Using AI Code Generation

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1const { getRealChild } = require('playwright/​lib/​client/​selectorEngine');2const { chromium } = require('playwright');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 const element = await page.$('input[name="q"]');8 const realChild = getRealChild(element);9 console.log(realChild);10 await browser.close();11})();12ElementHandle {13 _context: BrowserContext {

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Using AI Code Generation

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1const { getRealChild } = require('playwright/​lib/​server/​dom.js');2const { chromium } = require('playwright');3(async () => {4 const browser = await chromium.launch();5 const page = await browser.newPage();6 const element = await page.$('text=Get Started');7 const realElement = getRealChild(element);8 console.log(realElement);9 await browser.close();10})();11ElementHandle {12 _channel: Channel {13 connection: Connection {14 _events: [Object: null prototype] {},

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Using AI Code Generation

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1const { getRealChild } = require('playwright/​lib/​server/​dom.js');2const { chromium } = require('playwright');3(async () => {4 const browser = await chromium.launch({ headless: false });5 const context = await browser.newContext();6 const page = await context.newPage();7 const element = await page.$('text=Get Started');8 const realElement = getRealChild(element);9 console.log(realElement);10 await browser.close();11})();12ElementHandle: {13 _context: BrowserContext {14 _browser: Browser {15 },16 _options: {

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Using AI Code Generation

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1const { getRealChild } = require('playwright/​lib/​server/​dom.js');2const child = getRealChild(element);3const { getRealChildren } = require('playwright/​lib/​server/​dom.js');4const children = getRealChildren(element);5const { getRealParent } = require('playwright/​lib/​server/​dom.js');6const parent = getRealParent(element);7const { getRealParents } = require('playwright/​lib/​server/​dom.js');8const parents = getRealParents(element);9const { getRealAttribute } = require('playwright/​lib/​server/​dom.js');10const attribute = getRealAttribute(element, attribute);11const { getRealAttributes } = require('playwright/​lib/​server/​dom.js');12const attributes = getRealAttributes(element);13const { getRealText } = require('playwright/​lib/​server/​dom.js');14const text = getRealText(element);15const { getRealValue } = require('playwright/​lib/​server/​dom.js');16const value = getRealValue(element);17const { getRealStyle } = require('playwright/​lib/​server/​dom.js');18const style = getRealStyle(element, style);19const { getRealStyles } = require('playwright/​lib/​server/​dom.js');20const styles = getRealStyles(element);21const { getRealProperty } = require('playwright/​lib/​server/​dom.js');22const property = getRealProperty(element, property);23const { getRealProperties } = require('playwright/​lib/​server/​dom.js');24const properties = getRealProperties(element);25const { getRealChildNodes } = require('playwright/​lib/​server/​dom.js');26const childNodes = getRealChildNodes(element);

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Using AI Code Generation

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1const { getRealChild } = require('playwright/​lib/​server/​dom.js');2const element = await page.$('button');3const realElement = getRealChild(element);4console.log(realElement);5const { getRealChild } = require('playwright/​lib/​server/​dom.js');6const element = await page.$('button');7const realElement = getRealChild(element);8console.log(realElement);

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Using AI Code Generation

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1const { getRealChild } = require('playwright/​lib/​utils/​elementHandleDispatcher');2const elementHandle = await page.$('#elementId');3const realChild = await getRealChild(elementHandle);4await realChild.click();5await page.screenshot({ path: 'example.png' });6await browser.close();7module.exports = {8 use: {9 playwright: {10 launchOptions: {11 },12 },13 },14};15module.exports = {16 use: {17 playwright: {18 launchOptions: {19 },20 },21 },22};23module.exports = {24 use: {25 playwright: {26 launchOptions: {27 },28 },29 },30};31module.exports = {32 use: {33 playwright: {34 launchOptions: {35 },36 },37 },38};39module.exports = {40 use: {41 playwright: {42 launchOptions: {43 },44 },45 },46};47module.exports = {48 use: {49 playwright: {50 launchOptions: {51 },52 },53 },54};55module.exports = {56 use: {57 playwright: {58 launchOptions: {59 },

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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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