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How to use isInteractive method in Playwright Internal

Best JavaScript code snippet using playwright-internal

MentionDropdownMenu.js

1/*2 * Copyright (C) 2021 - present Instructure, Inc.3 *4 * This file is part of Canvas.5 *6 * Canvas is free software: you can redistribute it and/or modify it under7 * the terms of the GNU Affero General Public License as published by the Free8 * Software Foundation, version 3 of the License.9 *10 * Canvas is distributed in the hope that it will be useful, but WITHOUT ANY11 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR12 * A PARTICULAR PURPOSE. See the GNU Affero General Public License for more13 * details.14 *15 * You should have received a copy of the GNU Affero General Public License along16 * with this program. If not, see <http://www.gnu.org/licenses/>.17 */18import PropTypes from 'prop-types'19import React, {useMemo, useRef, useState} from 'react'20import MentionDropdownOption from './MentionDropdownOption'21import {View} from '@instructure/ui-view'22import {usePopper} from 'react-popper'23import {ARIA_ID_TEMPLATES} from '../../constants'24const MentionDropdownMenu = ({25  onSelect,26  onMouseEnter,27  mentionOptions,28  coordiantes,29  selectedUser,30  instanceId,31  highlightMouse,32  onOptionMouseEnter,33  isInteractive34}) => {35  // Hooks & Variables36  const directionality = tinyMCE?.activeEditor?.getParam('directionality')37  const menuRef = useRef(null)38  // Setup Popper39  const virtualReference = useMemo(() => {40    return {41      getBoundingClientRect: () => {42        return coordiantes43      }44    }45  }, [coordiantes])46  const [popperElement, setPopperElement] = useState(null)47  const {styles, attributes} = usePopper(virtualReference, popperElement, {48    placement: directionality === 'rtl' ? 'bottom-end' : 'bottom-start',49    modifiers: [50      {51        name: 'flip',52        options: {53          flipVariations: false,54          fallbackPlacements: ['bottom', 'bottom-end', 'bottom-start']55        }56      }57    ]58  })59  // Memoize map of Mention Options60  const menuItems = useMemo(() => {61    return mentionOptions.map(user => {62      return (63        <MentionDropdownOption64          {...user}65          onSelect={() => {66            onSelect({67              ...user,68              elementId: ARIA_ID_TEMPLATES.activeDescendant(instanceId, user.id)69            })70          }}71          isSelected={selectedUser === user.id}72          key={user.id}73          id={ARIA_ID_TEMPLATES.activeDescendant(instanceId, user.id)}74          highlightMouse={highlightMouse}75          onOptionMouseEnter={() => {76            onOptionMouseEnter(user)77          }}78          menuRef={menuRef}79          isInteractive={isInteractive}80        />81      )82    })83  }, [84    mentionOptions,85    selectedUser,86    instanceId,87    highlightMouse,88    isInteractive,89    onSelect,90    onOptionMouseEnter91  ])92  // Don't show if menu is empty93  if (mentionOptions?.length === 0) {94    return null95  }96  return (97    <div98      className="mention-dropdown-menu"99      ref={isInteractive ? setPopperElement : null}100      style={isInteractive ? {...styles.popper, zIndex: 10000} : null}101      onMouseEnter={isInteractive ? onMouseEnter : null}102      {...attributes.popper}103    >104      <View105        as="div"106        background="primary"107        borderWidth="small"108        borderRadius="medium"109        maxHeight="200px"110        maxWidth="400px"111        minWidth="320px"112        overflowY="auto"113        padding="none"114        shadow="above"115        width="auto"116        elementRef={el => {117          menuRef.current = el118        }}119      >120        <ul121          aria-label="Mentionable Users"122          id={ARIA_ID_TEMPLATES.ariaControlTemplate(instanceId)}123          role="listbox"124          style={{125            paddingInlineStart: '0px',126            marginBlockStart: '0px',127            marginBlockEnd: '0px',128            margin: '0'129          }}130        >131          {menuItems}132        </ul>133      </View>134    </div>135  )136}137export default MentionDropdownMenu138MentionDropdownMenu.proptypes = {139  /**140   * Array of optons to be presented to user141   */142  mentionOptions: PropTypes.array,143  /**144   * Unique ID supplied for ARIA support145   */146  instanceId: PropTypes.string,147  /**148   * cordinates for menu on screen149   */150  coordiantes: PropTypes.object,151  /**152   * Callback for selecting an item153   */154  onSelect: PropTypes.func,155  /**156   * ID of selected user157   */158  selectedUser: PropTypes.string,159  /**160   * Event for triggering onMosueOver161   */162  onMouseEnter: PropTypes.func,163  /**164   * Bool to control mouse highlighting165   */166  highlightMouse: PropTypes.bool,167  /**168   * Callback to set user on hover169   */170  onOptionMouseEnter: PropTypes.func,171  /**172   * isInteractive determines if menu will recieve events173   * This is used for the hidden menu offscreen in the RCE174   */175  isInteractive: PropTypes.bool176}177MentionDropdownMenu.defaultProps = {178  isInteractive: true,179  onSelect: () => {}...

index.js

Source: index.js

1import React, { useState } from 'react';2import PropTypes from 'prop-types';3import { Row, Col } from '../Layout';4import { SmallBody } from '../Text';5import Icon from '../Icon';67import { StyledIconButton } from './style';89const StarsRating = ({10  defaultRating,11  isInteractive,12  maxRating = 5,13  starSize = 24,14  color = '#FEC35A',15  onHoverColor = '#171F46',16  onChangeRating,17  labels18}) => {19  const [rating, setRating] = useState(defaultRating);20  const [hoveredRating, setHoveredRating] = useState(-1);21  const isHovered = idx =>22    isInteractive && hoveredRating >= idx ? onHoverColor : '';23  const handleSetRating = rating => {24    if (isInteractive) {25      setRating(rating);26      if (onChangeRating) {27        onChangeRating(rating);28      }29    }30  };31  const stars = [];32  for (let i = 0; i < maxRating; i += 1) {33    if (isHovered(i)) {34      stars.push(35        <StyledIconButton36          onClick={() => handleSetRating(i + 1)}37          onMouseEnter={() => setHoveredRating(i)}38          onMouseLeave={() => setHoveredRating(-1)}39          isInteractive={isInteractive}40          onHoverColor={isHovered(i)}41        >42          <Icon size={starSize} name='star-Filled' color={onHoverColor} />43        </StyledIconButton>44      );45      continue;46    }47    if (i + 0.5 === rating) {48      stars.push(49        <StyledIconButton50          onClick={() => handleSetRating(i + 1)}51          onMouseEnter={() => setHoveredRating(i)}52          onMouseLeave={() => setHoveredRating(-1)}53          isInteractive={isInteractive}54          onHoverColor={isHovered(i)}55        >56          <Icon size={starSize} name='Star-Half' color={color} />57        </StyledIconButton>58      );59      continue;60    }61    if (rating > i) {62      stars.push(63        rating >= i + 0.5 ? (64          <StyledIconButton65            onClick={() => handleSetRating(i + 1)}66            onMouseEnter={() => setHoveredRating(i)}67            onMouseLeave={() => setHoveredRating(-1)}68            isInteractive={isInteractive}69            onHoverColor={isHovered(i)}70          >71            <Icon size={starSize} name={'star-Filled'} color={color} />72          </StyledIconButton>73        ) : (74          <StyledIconButton75            onClick={() => handleSetRating(i + 1)}76            onMouseEnter={() => setHoveredRating(i)}77            onMouseLeave={() => setHoveredRating(-1)}78            isInteractive={isInteractive}79            onHoverColor={isHovered(i)}80          >81            <Icon size={starSize} name='star' color={color} />82          </StyledIconButton>83        )84      );85      continue;86    } else {87      stars.push(88        <StyledIconButton89          isInteractive={isInteractive}90          onClick={() => handleSetRating(i + 1)}91          onMouseEnter={() => setHoveredRating(i)}92          onMouseLeave={() => setHoveredRating(-1)}93          onHoverColor={isHovered(i)}94        >95          <Icon size={starSize} name='star' color={color} />96        </StyledIconButton>97      );98      continue;99    }100  }101102  return (103    <Col>104      <Row justify={labels && labels.length && 'space-between'} noWrap>105        {stars}106      </Row>107      {labels && (108        <Row justify='space-between'>109          {labels.map(l => (110            <SmallBody key={'stars-labels' + l}>{l}</SmallBody>111          ))}112        </Row>113      )}114    </Col>115  );116};117118StarsRating.propTypes = {119  labels: PropTypes.arrayOf(PropTypes.string),120  isInteractive: PropTypes.bool,121  onChangeRating: PropTypes.func,122  defaultRating: PropTypes.number,123  starSize: PropTypes.number,124  color: PropTypes.string,125  onHoverColor: PropTypes.string,126  maxRating: PropTypes.number127};128129StarsRating.defaultProps = {130  isInteractive: false,131  color: '#FEC35A',132  onHoverColor: '#171F46',133  starSize: 24,134  maxRating: 5,135  defaultRating: 0136};
...

browsersHelper.js

Source: browsersHelper.js

1/**2 * Copyright (c) 2015-present, Facebook, Inc.3 *4 * This source code is licensed under the MIT license found in the5 * LICENSE file in the root directory of this source tree.6 */7'use strict';8const browserslist = require('browserslist');9const chalk = require('chalk');10const os = require('os');11const prompts = require('prompts');12const pkgUp = require('pkg-up');13const fs = require('fs');14const defaultBrowsers = {15  production: ['>0.2%', 'not dead', 'not op_mini all'],16  development: [17    'last 1 chrome version',18    'last 1 firefox version',19    'last 1 safari version',20  ],21};22function shouldSetBrowsers(isInteractive) {23  if (!isInteractive) {24    return Promise.resolve(true);25  }26  const question = {27    type: 'confirm',28    name: 'shouldSetBrowsers',29    message:30      chalk.yellow("We're unable to detect target browsers.") +31      `\n\nWould you like to add the defaults to your ${chalk.bold(32        'package.json'33      )}?`,34    initial: true,35  };36  return prompts(question).then(answer => answer.shouldSetBrowsers);37}38function checkBrowsers(dir, isInteractive, retry = true) {39  const current = browserslist.loadConfig({ path: dir });40  if (current != null) {41    return Promise.resolve(current);42  }43  if (!retry) {44    return Promise.reject(45      new Error(46        chalk.red(47          'As of react-scripts >=2 you must specify targeted browsers.'48        ) +49          os.EOL +50          `Please add a ${chalk.underline(51            'browserslist'52          )} key to your ${chalk.bold('package.json')}.`53      )54    );55  }56  return shouldSetBrowsers(isInteractive).then(shouldSetBrowsers => {57    if (!shouldSetBrowsers) {58      return checkBrowsers(dir, isInteractive, false);59    }60    return (61      pkgUp({ cwd: dir })62        .then(filePath => {63          if (filePath == null) {64            return Promise.reject();65          }66          const pkg = JSON.parse(fs.readFileSync(filePath));67          pkg['browserslist'] = defaultBrowsers;68          fs.writeFileSync(filePath, JSON.stringify(pkg, null, 2) + os.EOL);69          browserslist.clearCaches();70          console.log();71          console.log(72            `${chalk.green('Set target browsers:')} ${chalk.cyan(73              defaultBrowsers.join(', ')74            )}`75          );76          console.log();77        })78        // Swallow any error79        .catch(() => {})80        .then(() => checkBrowsers(dir, isInteractive, false))81    );82  });83}...

isInteractive.test.js

Source: isInteractive.test.js

1// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.2let oldIsTTY;3let oldTERM;4beforeEach(() => {5  oldIsTTY = process.stdout.isTTY;6  oldTERM = process.env.TERM;7});8afterEach(() => {9  process.stdout.isTTY = oldIsTTY;10  process.env.TERM = oldTERM;11  jest.resetModules();12});13it('Returns true when running on interactive environment', () => {14  jest.doMock('is-ci', () => false);15  process.stdout.isTTY = true;16  process.env.TERM = 'xterm-256color';17  const isInteractive = require('../isInteractive').default;18  expect(isInteractive).toBe(true);19});20it('Returns false when running on a non-interactive environment', () => {21  let isInteractive;22  const expectedResult = false;23  // Test with is-ci being true and isTTY false24  jest.doMock('is-ci', () => true);25  process.stdout.isTTY = false;26  process.env.TERM = 'xterm-256color';27  isInteractive = require('../isInteractive').default;28  expect(isInteractive).toBe(expectedResult);29  // Test with is-ci being false and isTTY false30  jest.resetModules();31  jest.doMock('is-ci', () => false);32  process.stdout.isTTY = false;33  process.env.TERM = 'xterm-256color';34  isInteractive = require('../isInteractive').default;35  expect(isInteractive).toBe(expectedResult);36  // Test with is-ci being true and isTTY true37  jest.resetModules();38  jest.doMock('is-ci', () => true);39  process.stdout.isTTY = true;40  process.env.TERM = 'xterm-256color';41  isInteractive = require('../isInteractive').default;42  expect(isInteractive).toBe(expectedResult);43  // Test with dumb terminal44  jest.resetModules();45  jest.doMock('is-ci', () => false);46  process.stdout.isTTY = false;47  process.env.TERM = 'dumb';48  isInteractive = require('../isInteractive').default;49  expect(isInteractive).toBe(expectedResult);...

37isInteractive.test.js

Source: 37isInteractive.test.js

1// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.2let oldIsTTY;3let oldTERM;4beforeEach(() => {5  oldIsTTY = process.stdout.isTTY;6  oldTERM = process.env.TERM;7});8afterEach(() => {9  process.stdout.isTTY = oldIsTTY;10  process.env.TERM = oldTERM;11  jest.resetModules();12});13it('Returns true when running on interactive environment', () => {14  jest.doMock('is-ci', () => false);15  process.stdout.isTTY = true;16  process.env.TERM = 'xterm-256color';17  const isInteractive = require('../isInteractive').default;18  expect(isInteractive).toBe(true);19});20it('Returns false when running on a non-interactive environment', () => {21  let isInteractive;22  const expectedResult = false;23  // Test with is-ci being true and isTTY false24  jest.doMock('is-ci', () => true);25  process.stdout.isTTY = false;26  process.env.TERM = 'xterm-256color';27  isInteractive = require('../isInteractive').default;28  expect(isInteractive).toBe(expectedResult);29  // Test with is-ci being false and isTTY false30  jest.resetModules();31  jest.doMock('is-ci', () => false);32  process.stdout.isTTY = false;33  process.env.TERM = 'xterm-256color';34  isInteractive = require('../isInteractive').default;35  expect(isInteractive).toBe(expectedResult);36  // Test with is-ci being true and isTTY true37  jest.resetModules();38  jest.doMock('is-ci', () => true);39  process.stdout.isTTY = true;40  process.env.TERM = 'xterm-256color';41  isInteractive = require('../isInteractive').default;42  expect(isInteractive).toBe(expectedResult);43  // Test with dumb terminal44  jest.resetModules();45  jest.doMock('is-ci', () => false);46  process.stdout.isTTY = false;47  process.env.TERM = 'dumb';48  isInteractive = require('../isInteractive').default;49  expect(isInteractive).toBe(expectedResult);...

is_interactive.test.js

Source: is_interactive.test.js

1let oldIsTTY;2let oldTERM;3beforeEach(() => {4  oldIsTTY = process.stdout.isTTY;5  oldTERM = process.env.TERM;6});7afterEach(() => {8  process.stdout.isTTY = oldIsTTY;9  process.env.TERM = oldTERM;10  jest.resetModules();11});12it('Returns true when running on interactive environment', () => {13  jest.doMock('is-ci', () => false);14  process.stdout.isTTY = true;15  process.env.TERM = 'xterm-256color';16  const isInteractive = require('../is_interative').default;17  expect(isInteractive).toBe(true);18});19it('Returns false when running on a non-interactive environment', () => {20  let isInteractive;21  const expectedResult = false;22  // Test with is-ci being true and isTTY false23  jest.doMock('is-ci', () => true);24  process.stdout.isTTY = false;25  process.env.TERM = 'xterm-256color';26  isInteractive = require('../is_interative').default;27  expect(isInteractive).toBe(expectedResult);28  // Test with is-ci being false and isTTY false29  jest.resetModules();30  jest.doMock('is-ci', () => false);31  process.stdout.isTTY = false;32  process.env.TERM = 'xterm-256color';33  isInteractive = require('../is_interative').default;34  expect(isInteractive).toBe(expectedResult);35  // Test with is-ci being true and isTTY true36  jest.resetModules();37  jest.doMock('is-ci', () => true);38  process.stdout.isTTY = true;39  process.env.TERM = 'xterm-256color';40  isInteractive = require('../is_interative').default;41  expect(isInteractive).toBe(expectedResult);42  // Test with dumb terminal43  jest.resetModules();44  jest.doMock('is-ci', () => false);45  process.stdout.isTTY = false;46  process.env.TERM = 'dumb';47  isInteractive = require('../is_interative').default;48  expect(isInteractive).toBe(expectedResult);...

doll.js

Source: doll.js

...10    }11    set type(type) {12        this._type = type;13    }14    get isInteractive() {15        return this._isInteractive;16    }17    set isInteractive(isInteractive) {18        this._isInteractive = isInteractive;19    }20}...

isInteractive.js

Source: isInteractive.js

1import React from 'react';2export const isInteractive = (Component) =>3    class IsInteractive extends React.Component {4        constructor (props) {5            super(props);6            this.state = {7                isInteractive: false8            };9        }10        componentDidMount () {11            this.setState({ isInteractive: true });12        }13        render () {14            return (15                <Component { ...this.props } isInteractive={ this.state.isInteractive } />16            );17        }18    }...

Using AI Code Generation

1const { isInteractive } = require('playwright/lib/server/browserType');2console.log(isInteractive);3const { isInteractive } = require('playwright/lib/server/browserType');4console.log(isInteractive);5const { isHeadless } = require('playwright/lib/server/browserType');6console.log(isHeadless);7const { isHeadless } = require('playwright/lib/server/browserType');8console.log(isHeadless);

Using AI Code Generation

1const { isInteractive } = require('playwright/lib/server/browserType');2console.log(isInteractive());3const { isInteractive } = require('playwright/lib/server/browserType');4console.log(isInteractive());5const { isInteractive } = require('playwright/lib/server/browserType');6console.log(isInteractive());7const { isInteractive } = require('playwright/lib/server/browserType');8console.log(isInteractive());9const { isInteractive } = require('playwright/lib/server/browserType');10console.log(isInteractive());11const { isInteractive } = require('playwright/lib/server/browserType');12console.log(isInteractive());13const { isInteractive } = require('playwright/lib/server/browserType');14console.log(isInteractive());15const { isInteractive } = require('playwright/lib/server/browserType');16console.log(isInteractive());17const { isInteractive } = require('playwright/lib/server/browserType');18console.log(isInteractive());19const { isInteractive } = require('playwright/lib/server/browserType');20console.log(isInteractive());21const { isInteractive } = require('playwright/lib/server/browserType');22console.log(isInteractive());23const { isInteractive } = require('playwright/lib/server/browser

Using AI Code Generation

1const { isInteractive } = require('playwright/lib/server/supplements/recorder/recorderApp');2const { isInteractive } = require('playwright/lib/server/supplements/recorder/recorderApp');3const { isInteractive } = require('playwright/lib/server/supplements/recorder/recorderApp');4const { isInteractive } = require('playwright/lib/server/supplements/recorder/recorderApp');5const { isInteractive } = require('playwright/lib/server/supplements/recorder/recorderApp');6const { isInteractive } = require('playwright/lib/server/supplements/recorder/recorderApp');7const { isInteractive } = require('playwright/lib/server/supplements/recorder/recorderApp');8const { isInteractive } = require('playwright/lib/server/supplements/recorder/recorderApp');9const { isInteractive } = require('playwright/lib/server/supplements/recorder/recorderApp');10const { isInteractive } = require('playwright/lib/server/supplements/recorder/recorderApp

Using AI Code Generation

1const { isInteractive } = require('@playwright/test/lib/utils');2const { test, expect } = require('@playwright/test');3const { chromium } = require('playwright');4test.describe('Playwright', () => {5  test.beforeEach(async ({ page }) => {6  });7  test('should be able to click through the menu', async ({ page }) => {8    await page.click('text=Docs');9    await page.click('text=API');10    await page.click('text=Playwright');11  });12  test('should be able to click through the menu', async ({ page }) => {13    await page.click('text=Docs');14    await page.click('text=API');15    await page.click('text=Playwright');16  });17});18import { test, expect } from '@playwright/test';19import { chromium } from 'playwright';20test.describe('Playwright', () => {21  test.beforeEach(async ({ page }) => {22  });23  test('should be able to click through the menu', async ({ page }) => {24    await page.click('text=Docs');25    await page.click('text=API');26    await page.click('text=Playwright');27  });28  test('should be able to click through the menu', async ({ page }) => {29    await page.click('text=Docs');30    await page.click('text=API');

Using AI Code Generation

1const { isInteractive } = require('playwright-core/lib/utils/terminalUtils');2if (isInteractive()) {3    console.log("Running in interactive mode");4} else {5    console.log("Running in headless mode");6}

Using AI Code Generation

1const page = await context.newPage();2const isInteractive = await page._delegate.isInteractive();3console.log(isInteractive);4const page = await context.newPage();5const frame = page.mainFrame();6const isInteractive = await frame._delegate.isInteractive();7console.log(isInteractive);

Using AI Code Generation

1const { isInteractive } = require('@playwright/test/lib/server/traceViewer/ui/utils');2console.log(isInteractive());3const { isInteractive } = require('@playwright/test/lib/server/traceViewer/ui/utils');4const { chromium } = require('playwright');5(async () => {6  const browser = await chromium.launch({ headless: !isInteractive() });7  const context = await browser.newContext();8  const page = await context.newPage();9  await page.screenshot({ path: 'playwright.png' });10  await browser.close();11})();12[Apache 2.0](LICENSE)

StackOverFlow community discussions

Questions

Discussion

Jest + Playwright - Test callbacks of event-based DOM library

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

Is it possible to get the selector from a locator object in playwright?

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

Assuming you are not running test with the --runinband flag, the simple answer is yes but it depends ????

There is a pretty comprehensive GitHub issue jest#6957 that explains certain cases of when tests are run concurrently or in parallel. But it seems to depend on a lot of edge cases where jest tries its best to determine the fastest way to run the tests given the circumstances.

To my knowledge there is no way to force jest to run in parallel.

Aside

Have you considered using playwright instead of puppeteer with jest? Playwright has their own internally built testing library called @playwright/test that is used in place of jest with a similar API. This library allows for explicitly defining test groups in a single file to run in parallel (i.e. test.describe.parallel) or serially (i.e. test.describe.serial). Or even to run all tests in parallel via a config option.

// parallel
test.describe.parallel('group', () => {
  test('runs in parallel 1', async ({ page }) => {});
  test('runs in parallel 2', async ({ page }) => {});
});

// serial
test.describe.serial('group', () => {
  test('runs first', async ({ page }) => {});
  test('runs second', async ({ page }) => {});
});

https://stackoverflow.com/questions/73497773/how-to-run-a-list-of-test-suites-in-a-single-file-concurrently-in-jest

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

Well this is one way, but not sure if it will work for all possible locators!.

// Get a selector from a playwright locator
import { Locator } from "@playwright/test";
export function extractSelector(locator: Locator) {
    const selector = locator.toString();
    const parts = selector.split("@");
    if (parts.length !== 2) { throw Error("extractSelector: susupect that this is not a locator"); }
    if (parts[0] !== "Locator") { throw Error("extractSelector: did not find locator"); }
    return parts[1];
}

https://stackoverflow.com/questions/72044959/is-it-possible-to-get-the-selector-from-a-locator-object-in-playwright

I found the error. It was because of some missing libraries need. I discovered this when I downgraded playwright to version 1.9 and ran the the code then this was the error msg:

(node:12876) UnhandledPromiseRejectionWarning: browserType.launch: Host system is missing dependencies!

Some of the Universal C Runtime files cannot be found on the system. You can fix
that by installing Microsoft Visual C++ Redistributable for Visual Studio from:
https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads

Full list of missing libraries:
    vcruntime140.dll
    msvcp140.dll
Error
    at Object.captureStackTrace (D:\Projects\snkrs-play\node_modules\playwright\lib\utils\stackTrace.js:48:19)
    at Connection.sendMessageToServer (D:\Projects\snkrs-play\node_modules\playwright\lib\client\connection.js:69:48)
    at Proxy.<anonymous> (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:64:61)
    at D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:64:67
    at BrowserType._wrapApiCall (D:\Projects\snkrs-play\node_modules\playwright\lib\client\channelOwner.js:77:34)
    at BrowserType.launch (D:\Projects\snkrs-play\node_modules\playwright\lib\client\browserType.js:55:21)
    at D:\Projects\snkrs-play\index.js:4:35
    at Object.<anonymous> (D:\Projects\snkrs-play\index.js:7:3)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:12876) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12876) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

A list of missing libraries was provided. After successful installments, firefox ran fine. I upgraded again to version 1.10 and firefox still works.

https://stackoverflow.com/questions/66984974/firefox-browser-does-not-start-in-playwright

Blogs

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The purpose of developing test cases is to ensure the application functions as expected for the customer. Test cases provide basic application documentation for every function, feature, and integrated connection. Test case development often detects defects in the design or missing requirements early in the development process. Additionally, well-written test cases provide internal documentation for all application processing. Test case development is an important part of determining software quality and keeping defects away from customers.

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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.