Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Register for FREE! Join TestMu Conference

How to use isAsyncPlaceholder method in Playwright Internal

Best JavaScript code snippet using playwright-internal

transition.js

Source:transition.js

...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-${this._uid}-`125    child.key = child.key == null126      ? child.isComment127        ? id + 'comment'128        : id + child.tag129      : isPrimitive(child.key)130        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)131        : child.key132    const data: Object = (child.data || (child.data = {})).transition = extractTransitionData(this)133    const oldRawChild: VNode = this._vnode134    const oldChild: VNode = getRealChild(oldRawChild)135    // mark v-show136    // so that the transition module can hand over the control to the directive137    if (child.data.directives && child.data.directives.some(isVShowDirective)) {138      child.data.show = true139    }140    if (141      oldChild &&142      oldChild.data &&143      !isSameChild(child, oldChild) &&144      !isAsyncPlaceholder(oldChild) &&145      // #6687 component root is a comment node146      !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)147    ) {148      // replace old child transition data with fresh one149      // important for dynamic transitions!150      const oldData: Object = oldChild.data.transition = extend({}, data)151      // handle transition mode152      if (mode === 'out-in') {153        // return placeholder node and queue update when leave finishes154        this._leaving = true155        mergeVNodeHook(oldData, 'afterLeave', () => {156          this._leaving = false157          this.$forceUpdate()158        })159        return placeholder(h, rawChild)160      } else if (mode === 'in-out') {161        if (isAsyncPlaceholder(child)) {162          return oldRawChild163        }164        let delayedLeave165        const performLeave = () => { delayedLeave() }166        mergeVNodeHook(data, 'afterEnter', performLeave)167        mergeVNodeHook(data, 'enterCancelled', performLeave)168        mergeVNodeHook(oldData, 'delayLeave', leave => { delayedLeave = leave })169      }170    }171    return rawChild172  }...

utils.js

Source:utils.js

...10function getFirstComponentChild (children) {11  if (Array.isArray(children)) {12    for (let i = 0; i < children.length; i++) {13      const c = children[i]14      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {15        return c16      }17    }18  }19}20export {21  getFirstComponentChild,22  isAsyncPlaceholder,23  getComponentName,24  isDef...

get-first-component-child.js

Source:get-first-component-child.js

...4export function getFirstComponentChild (children: ?Array<VNode>): ?VNode {5  if (Array.isArray(children)) {6    for (let i = 0; i < children.length; i++) {7      const c = children[i]8      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {9        return c10      }11    }12  }...

Using AI Code Generation

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.click('input[name="q"]');7  await page.keyboard.type('Hello World');8  await page.keyboard.press('Enter');9  await page.waitForNavigation();10  await page.screenshot({ path: `example.png` });11  await browser.close();12})();

Using AI Code Generation

1const { isAsyncPlaceholder } = require('playwright/lib/utils/stackTrace');2console.log(isAsyncPlaceholder(new Error().stack));3const test = require('./test');4test('My Test', async ({ page }) => {5  await page.evaluate(() => {6    throw new Error('Error');7  });8});

Using AI Code Generation

1const { isAsyncPlaceholder } = require('playwright/lib/utils/structs.js');2console.log(isAsyncPlaceholder({ __asyncPlaceholder: true }));3console.log(isAsyncPlaceholder({ __asyncPlaceholder: false }));4console.log(isAsyncPlaceholder({ __asyncPlaceholder: 'true' }));5console.log(isAsyncPlaceholder({ __asyncPlaceholder: 'false' }));6console.log(typeof { __asyncPlaceholder: true }.__asyncPlaceholder === 'boolean');7console.log(typeof { __asyncPlaceholder: false }.__asyncPlaceholder === 'boolean');8console.log(typeof { __asyncPlaceholder: 'true' }.__asyncPlaceholder === 'boolean');9console.log(typeof { __asyncPlaceholder: 'false' }.__asyncPlaceholder === 'boolean');

Using AI Code Generation

1const { isAsyncPlaceholder } = require('playwright/lib/utils/stackTrace');2const asyncPlaceholder = async () => {3  throw new Error('Async Placeholder');4};5(async () => {6  try {7    await asyncPlaceholder();8  } catch (e) {9    console.log(isAsyncPlaceholder(e));10  }11})();

Using AI Code Generation

1const { isAsyncPlaceholder } = 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  await page.fill('input[name="q"]', 'Playwright');7  await page.click('input[type="submit"]');8  await page.waitForSelector('h3');9  const element = await page.$('h3');10  console.log(isAsyncPlaceholder(element));11  await browser.close();12})();13const { isAsyncPlaceholder } = require('playwright/lib/server/dom.js');14const { chromium } = require('playwright');15(async () => {16  const browser = await chromium.launch();17  const page = await browser.newPage();18  await page.fill('input[name="q"]', 'Playwright');19  await page.click('input[type="submit"]');20  await page.waitForSelector('h3');21  const element = await page.$('h3');22  console.log(isAsyncPlaceholder(element));23  await browser.close();24})();25Your name to display (optional):26Your name to display (optional):27Your name to display (optional):28Your name to display (optional):29const { chromium } = require('playwright');30(async () => {31  const browser = await chromium.launch();

Using AI Code Generation

1const { isAsyncPlaceholder } = require('playwright/lib/internal/asyncstack');2const { Page } = require('playwright/lib/page');3const { Playwright } = require('playwright/lib/server/playwright');4const { Browser } = require('playwright/lib/server/browser');5const { BrowserContext } = require('playwright/lib/server/browserContext');6const { Frame } = require('playwright/lib/server/frame');7const { ElementHandle } = require('playwright/lib/server/elementHandler');8const { JSHandle } = require('playwright/lib/server/javascript');9const page = new Page(new BrowserContext(new Browser(new Playwright()), null), null);10const frame = new Frame(page, null, null);11const element = new ElementHandle(frame, null, null);12const jsHandle = new JSHandle(element, null, null);13const isAsyncPlaceholderResult = isAsyncPlaceholder(jsHandle);14console.log("isAsyncPlaceholderResult: " + isAsyncPlaceholderResult);

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.