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How to use getClientLanguage method in Playwright Internal

Best JavaScript code snippet using playwright-internal

import.js

...133				let cardGroups = [];134				let totalQuantity = 0;135				if (fs.existsSync(process.env.PWD + '/private/')) {136					if (type === 'demo') {137						demoPath = process.env.PWD + '/public/demo/' + ServerStyle.getDemoFolder() + '/' + ServerStyle.getClientLanguage() + "/";138					} else {139						demoPath = process.env.PWD + '/public/demo/makingOf/' + ServerStyle.getClientLanguage() + "/";140					}141				} else {142					if (type === 'demo') {143						demoPath = process.env.PWD + '/programs/web.browser/app/demo/' + ServerStyle.getDemoFolder() + '/' + ServerStyle.getClientLanguage() + "/";144					} else {145						demoPath = process.env.PWD + '/programs/web.browser/app/demo/makingOf/' + ServerStyle.getClientLanguage() + "/";146					}147				}148				if (fs.existsSync(demoPath)) {149					let cardsetFiles = fs.readdirSync(demoPath);150					let originalAuthorName;151					for (let i = 0; i < cardsetFiles.length; i++) {152						let cardset;153						let res = fs.readFileSync(demoPath + cardsetFiles[i], 'utf8');154						if (res.charAt(0) === '[' && res.charAt(res.length - 1) === ']') {155							cardset = JSON.parse(res);156						} else {157							cardset = JSON.parse('[' + res + ']');158						}159						if (cardset[0].originalAuthor !== undefined) {...

Context.js

Source: Context.js

1/***2 * Copyright (C) Rodolfo Herrera Hernandez. All rights reserved.3 * Licensed under the MIT license. See LICENSE file in the project root4 * for full license information.5 *6 * =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+7 *8 * For related information - https://github.com/CodeWithRodi/Cutternet/9 *10 * Cutternet Client Source Code11 *12 * =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-13 ****/14import React, { useState, createContext, useEffect } from 'react';15import { DoServerRequest, GetClientLanguage } from '../../Utils/Shortcuts';16import HandleError from '../../Utils/ErrorController';17import { useLocation, useNavigate } from 'react-router';18import { GetAllLanguages, DeleteLanguage, UpdateLanguage, CreateLanguage } from './Service';19export const LanguageContext = createContext();20export const LanguageProvider = ({ children }) => {21    const [GetMessage, SetMessage] = useState(null);22    const [GetError, SetError] = useState(null);23    const [GetLanguages, SetLanguages] = useState({});24    const [GetIsLanguageLoading, SetIsLanguageLoading] = useState(true);25    const Location = useLocation();26    const Navigate = useNavigate();27    const Setters = { OnErrorSetter: SetError };28    const RequiredFields = ['Key'];29    const SortFields = [30        [GetLanguages.LANGUAGE_CONTEXT_SORT_KEY, 'Key'],31        [GetLanguages.LANGUAGE_CONTEXT_SORT_VALUE, 'Value'],32        [GetLanguages.LANGUAGE_CONTEXT_SORT_LANGUAGE, 'Language']33    ];34    const FilterFields = [35        [GetLanguages.LANGUAGE_CONTEXT_FILTER_VALUE, 'Value'],36        [GetLanguages.LANGUAGE_CONTEXT_FILTER_LANGUAGE, 'Language']37    ];38    const OnCreateLanguage = ({ OnStart, Data, OnResolve, OnRejection }) =>39        DoServerRequest({40            Setters,41            OnStart,42            InPromise: { OnResolve, OnRejection },43            Axios: {44                Callback: CreateLanguage,45                Arguments: [Data]46            }47        });48    const OnGetAllLanguages = ({ OnStart, OnResolve, OnFinish, Language, Filter }) =>49        DoServerRequest({50            Setters,51            OnFinish,52            OnStart,53            InPromise: { OnResolve },54            Axios: {55                Callback: GetAllLanguages,56                Arguments: [Language || '-1', Filter]57            }58        });59    const OnDeleteLanguage = ({ OnStart, OnResolve, OnFinish, LanguageIdentifier }) =>60        DoServerRequest({61            Setters,62            OnStart,63            OnFinish,64            InPromise: { OnResolve },65            Axios: {66                Callback: DeleteLanguage,67                Arguments: [LanguageIdentifier]68            }69        });70    const OnUpdateLanguage = ({ OnStart, OnFinish, OnResolve, LanguageIdentifier, Data }) =>71        DoServerRequest({72            Setters,73            OnStart,74            OnFinish,75            InPromise: { OnResolve },76            Axios: {77                Callback: UpdateLanguage,78                Arguments: [LanguageIdentifier, Data]79            }80        });81    useEffect(82        () =>83            OnGetAllLanguages({84                OnStart: () => SetIsLanguageLoading(true),85                OnResolve: (Response) => {86                    const Buffer = {};87                    Response.Data.forEach((Data) => (Buffer[Data.Key] = Data.Value));88                    SetLanguages(Buffer);89                },90                OnFinish: () => SetIsLanguageLoading(false),91                Language: GetClientLanguage(),92                Filter: {93                    Paginate: { Limit: -1, Page: 0 }94                }95            }),96        [] // eslint-disable-line react-hooks/exhaustive-deps97    ); 98    useEffect(99        () =>100            HandleError({101                Navigate,102                Location,103                SetMessage,104                GetLanguages,105                ClientError: GetError106            }),107        [GetError] // eslint-disable-line react-hooks/exhaustive-deps108    ); 109    useEffect(() => {110        SetError(null);111        Array.isArray(GetMessage) ? SetMessage(GetMessage[0]) : SetMessage(null);112    }, [Location]); // eslint-disable-line react-hooks/exhaustive-deps113    return (114        <LanguageContext.Provider115            value={{116                GetMessage,117                SetMessage,118                GetIsLanguageLoading,119                OnGetAllLanguages,120                GetLanguages,121                OnDeleteLanguage,122                OnUpdateLanguage,123                OnCreateLanguage,124                RequiredFields,125                SortFields,126                FilterFields127            }}128        >129            {children}130        </LanguageContext.Provider>131    );...

userAgent.js

Source: userAgent.js

...64  }65  const {66    langName,67    langVersion68  } = getClientLanguage();69  return `Playwright/${getPlaywrightVersion()} (${_os.default.arch()}; ${osIdentifier} ${osVersion}) ${langName}/${langVersion}`;70}71function getClientLanguage() {72  let langName = 'unknown';73  let langVersion = 'unknown';74  if (!process.env.PW_LANG_NAME) {75    langName = 'node';76    langVersion = process.version.substring(1).split('.').slice(0, 2).join('.');77  } else if (['node', 'python', 'java', 'csharp'].includes(process.env.PW_LANG_NAME)) {78    var _process$env$PW_LANG_;79    langName = process.env.PW_LANG_NAME;80    langVersion = (_process$env$PW_LANG_ = process.env.PW_LANG_NAME_VERSION) !== null && _process$env$PW_LANG_ !== void 0 ? _process$env$PW_LANG_ : 'unknown';81  }82  return {83    langName,84    langVersion85  };...

index.js

Source: index.js

...44        clonedObj[key] = (value === null) ? getLocale(locales[key], country, def) : value45    }46    return clonedObj47}48function getClientLanguage() {49    // try {50    //     let lang = navigator.language || navigator.userLanguage51    //     if (!lang) {52    //         return 'us'53    //     }54    //55    //     lang = lang.toLowerCase()56    //     switch (lang) {57    //         case 'zh-cn':58    //             return 'cn'59    //         case 'zh':60    //             return 'cn'61    //         case 'zh-tw':62    //             return 'cn'63    //         case 'zh-hk':64    //             return 'cn'65    //         case 'zh-mo':66    //             return 'cn'67    //         default:68    //             return 'us'69    //     }70    // } catch (e) {71    //72    // }73    localStorage.setItem("localeLanguage",'cn')74    return 'cn'75}76const DEFAULT_LANG = getClientLanguage() // 'us'77const LOCALE_KEY = 'localeLanguage'78const locales = {79    //en: require('./en.json'),80    us: getLocale(langs, 'us', 'us'),81    cn: getLocale(langs, 'cn', 'us')82}83const i18n = new VueI18n({84    locale: DEFAULT_LANG,85    messages: locales86})87export const setup = lang => {88    if (lang === undefined) {89        lang = window.localStorage.getItem(LOCALE_KEY)90        if (locales[lang] === undefined) {...

background.js

Source: background.js

...19  }else if(details.reason == "update"){20  }21});22function onInstall() {23  localStorage.setItem('language', getClientLanguage());24  chrome.runtime.openOptionsPage();25}26function getClientLanguage() {27  let lang = navigator.language.substr(0,2);28  if(getSupportLanguages().includes(lang)){29    return lang;30  }31  return 'en';32}33function getSupportLanguages() {34  return ["en", "pt_BR", "zh", "fr", "de", "ja", "ro", "ru", "es", "tr"];...

reducer.js

Source: reducer.js

...11    { code: 'sv', name: 'Svenska' },12    { code: 'en', name: 'English' },13];14const initialState = {15    language: getClientLanguage() || 'fi',16    availableLanguages,17};18export default createReducer(initialState, {19    [UPDATE_LANGUAGE](state: State, { language }): State {20        setClientLanguage(language);21        return Object.assign({}, state, { language });22    },...

multLng.js

Source: multLng.js

2var clientLanguage;3/*4è·åå¤è¯è¨ è¯è¨ 5*/6function getClientLanguage() {7    return getQueryString("lt") ? getQueryString("lt") : "zh-cn";8}9clientLanguage = getClientLanguage();10$(document).append('<script type=\"text/javascript\" src=\"' + baseUrl + 'scripts/multiplelanguage/' + clientLanguage + '.js\"><\/script>');11/*è·å æç¤º*/12function wanerdaoLangTip(key) {13    if (langtip[key]) {14        return langtip[key];15    } else {16        return '';17    }...

common_utils.js

Source: common_utils.js

1export function getClientLanguage(){2  if(navigator.browserLanguage)3    return navigator.browserLanguage.slice(0,2);4  if(navigator.language)  5    return navigator.language.slice(0,2);
...

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  const language = await page.evaluate(() => navigator.language);7  console.log(language);8  await browser.close();9})();

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  const language = await page.evaluate(() => {7    return window.playwright._internal.browserContext()._options.locale;8  });9  console.log(language);10  await browser.close();11})();12See [API.md](

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  const language = await page.evaluate(() => {7    const { navigator } = window;8    return navigator.language || navigator.userLanguage;9  });10  console.log(language);11  await browser.close();12})();13const { chromium } = require('playwright');14(async () => {15  const browser = await chromium.launch();16  const context = await browser.newContext();17  const page = await context.newPage();18  const language = await page.evaluate(() => {19    const { navigator } = window;20    return navigator.language || navigator.userLanguage;21  });22  console.log(language);23  await browser.close();24})();25const { chromium } = require('playwright');26(async () => {27  const browser = await chromium.launch();28  const context = await browser.newContext();29  const page = await context.newPage();30  const language = await page.evaluate(() => {31    const { navigator } = window;32    return navigator.language || navigator.userLanguage;33  });34  console.log(language);35  await browser.close();36})();37const { chromium } = require('playwright');38(async () => {39  const browser = await chromium.launch();40  const context = await browser.newContext();41  const page = await context.newPage();42  const language = await page.evaluate(() => {43    const { navigator } = window;44    return navigator.language || navigator.userLanguage;45  });46  console.log(language);47  await browser.close();48})();

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  const language = await page.evaluate(() => {7    return window.navigator.language;8  });9  console.log(language);10  await browser.close();11})();12#### browser.newContext([options])13  - `timezoneId` <[string]> Changes the timezone of the context. See ICU’s [metaZones.txt](

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  const language = await page.evaluate(() => window.navigator.language);7  console.log(language);8  await browser.close();9})();

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    const client = await page.context().newCDPSession(page);7    const language = await client.send('Playwright.getClientLanguage');8    console.log(language);9    await browser.close();10})();11{12}

Using AI Code Generation

1(async () => {2    const browser = await chromium.launch();3    const context = await browser.newContext();4    const page = await context.newPage();5    const client = await page.context().newCDPSession(page);6    const language = await client.send('Playwright.getClientLanguage');7    console.log(language);8    await browser.close();9})();10{ language: 'en-US' }

Using AI Code Generation

1const { chromium } = require('playwright-chromium');2const { devices } = require('playwright-chromium');3const iPhone = devices['iPhone 6'];4(async () => {5  const browser = await chromium.launch();6  const context = await browser.newContext({7    geolocation: { longitude: 12.492507, latitude: 41.889938 },8  });9  const page = await context.newPage();10  const client = await page.context().newCDPSession(page);11  const lang = await client.send('Playwright.getClientLanguage');12  console.log(lang);13  await browser.close();14})();

Using AI Code Generation

1const { chromium } = require('playwright');2const { getClientLanguage } = require('playwright/lib/client/clientHelper');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  const language = await getClientLanguage(page);8  console.log('Language of the browser: ', language);9  await browser.close();10})();11const { chromium } = require('playwright');12const { getClientLanguage } = require('playwright/lib/client/clientHelper');13const { test, expect } = require('@playwright/test');14test('get browser language', async ({ page }) => {15  const language = await getClientLanguage(page);16  expect(language).toBe('en-US');17});18const { chromium } = require('playwright');19const { getClientLanguage } = require('playwright/lib/client/clientHelper');20const { test, expect } = require('@playwright/test');21test('get browser language', async ({ page }) => {22  const language = await getClientLanguage(page);23  expect(language).toBe('en-US');24});25const { chromium } = require('playwright');26const { getClientLanguage } = require('playwright/lib/client/clientHelper');27const { test, expect } = require('@playwright/test');28test('get browser language', async ({ page }) => {29  const language = await getClientLanguage(page);30  expect(language).toBe('en-US');31});

StackOverFlow community discussions

Questions

Discussion

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

firefox browser does not start in playwright

Running Playwright in Azure Function

firefox browser does not start in playwright

How to run a list of test suites in a single file concurrently in jest?

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

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

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

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

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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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.

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