Cannot Read Property Kind of Undefined Typescript Elifecycle Errno 1
🎠Playwright
Documentation | API reference
Playwright is a framework for Web Testing and Automation. It allows testing Chromium, Firefox and WebKit with a single API. Playwright is built to enable cross-browser web automation that is ever-light-green, capable, reliable and fast.
| Linux | macOS | Windows | |
|---|---|---|---|
| Chromium 100.0.4863.0 | | | |
| WebKit fifteen.4 | | | |
| Firefox 96.0.1 | | | |
Headless execution is supported for all the browsers on all platforms. Check out system requirements for details.
Looking for Playwright for Python, .NET, or Coffee?
Installation
Playwright has its ain test runner for end-to-terminate tests, we call it Playwright Test.
Using init command
The easiest manner to go started with Playwright Test is to run the init control.
# Run from your project'due south root directory npm init playwright # Or create a new project npm init playwright new-project This will create a configuration file, optionally add examples, a GitHub Activeness workflow and a first test example.spec.ts. Y'all can now jump directly to writing assertions department.
Manually
Add dependency and install browsers.
npm i -D @playwright/exam # install supported browsers npx playwright install You can optionally install only selected browsers, come across install browsers for more details. Or yous can install no browsers at all and use existing browser channels.
- Getting started
- Installation configuration
- API reference
Capabilities
Resilient • No flaky tests
Auto-expect. Playwright waits for elements to be actionable prior to performing actions. Information technology also has rich prepare of introspection events. The combination of the two eliminate the demand for bogus timeouts - primary crusade of flaky tests.
Spider web-get-go assertions. Playwright assertions are created specifically for the dynamic web. Checks are automatically retried until the necessary conditions are met.
Tracing. Configure test retry strategy, capture execution trace, videos, screenshots to eliminate flakes.
No trade-offs • No limits
Browsers run web content belonging to different origins in dissimilar processes. Playwright is aligned with the modern browsers architecture and runs tests out-of-process. This makes Playwright complimentary of the typical in-process exam runner limitations.
Multiple everything. Test scenarios that span multiple tabs, multiple origins and multiple users. Create scenarios with different contexts for different users and run them against your server, all in one test.
Trusted events. Hover elements, interact with dynamic controls, produce trusted events. Playwright uses existent browser input pipeline duplicate from the real user.
Examination frames, pierce Shadow DOM. Playwright selectors pierce shadow DOM and let entering frames seamlessly.
Full isolation • Fast execution
Browser contexts. Playwright creates a browser context for each test. Browser context is equivalent to a brand new browser profile. This delivers full test isolation with cypher overhead. Creating a new browser context only takes a handful of milliseconds.
Log in once. Save the authentication land of the context and reuse it in all the tests. This bypasses repetitive log-in operations in each test, withal delivers full isolation of independent tests.
Powerful Tooling
Codegen. Generate tests by recording your deportment. Save them into any language.
Playwright inspector. Inspect folio, generate selectors, stride through the test execution, see click points, explore execution logs.
Trace Viewer. Capture all the information to investigate the test failure. Playwright trace contains test execution screencast, live DOM snapshots, action explorer, test source and many more.
Looking for Playwright for TypeScript, JavaScript, Python, .NET, or Java?
Examples
To learn how to run these Playwright Examination examples, check out our getting started docs.
Folio screenshot
This code snippet navigates to whatsmyuseragent.org and saves a screenshot.
import { test } from '@playwright/test' ; test ( 'Folio Screenshot' , async ( { page } ) => { await folio . goto ( 'http://whatsmyuseragent.org/' ) ; wait page . screenshot ( { path: `example.png` } ) ; } ) ; Mobile and geolocation
This snippet emulates Mobile Safari on a device at a given geolocation, navigates to maps.google.com, performs activity and takes a screenshot.
import { test , devices } from '@playwright/test' ; examination . use ( { ...devices [ 'iPhone 13 Pro' ] , locale: 'en-US' , geolocation: { longitude: 12.492507 , latitude: 41.889938 } , permissions: [ 'geolocation' ] , } ) examination ( 'Mobile and geolocation' , async ( { page } ) => { await page . goto ( 'https://maps.google.com' ) ; wait page . locator ( 'text="Your location"' ) . click ( ) ; await page . waitForRequest ( /.*preview\/pwa/ ) ; expect folio . screenshot ( { path: 'colosseum-iphone.png' } ) ; } ) ; Evaluate in browser context
This code snippet navigates to example.com, and executes a script in the page context.
import { examination } from '@playwright/test' ; test ( 'Evaluate in browser context' , async ( { folio } ) => { await page . goto ( 'https://www.example.com/' ) ; const dimensions = await page . evaluate ( ( ) => { return { width: document . documentElement . clientWidth , meridian: certificate . documentElement . clientHeight , deviceScaleFactor: window . devicePixelRatio } } ) ; console . log ( dimensions ) ; } ) ; Intercept network requests
This lawmaking snippet sets up request routing for a page to log all network requests.
import { test } from '@playwright/test' ; examination ( 'Intercept network requests' , async ( { page } ) => { // Log and proceed all network requests await folio . road ( '**' , road => { console . log ( route . request ( ) . url ( ) ) ; route . continue ( ) ; } ) ; await page . goto ( 'http://todomvc.com' ) ; } ) ; Resource
- Documentation
- API reference
- Community showcase
- Contribution guide
- Changelog
Source: https://www.npmjs.com/package/playwright
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