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How to use createCompileToFunctionFn method in Playwright Internal

Best JavaScript code snippet using playwright-internal

25-编译入口.js

...136            return compiled137        }138        return {139            compile,140            compileToFunctions:createCompileToFunctionFn(compile)141        }142    }143}144//createCompileToFunctionFn æ¹æ³,å®çå®ä¹å¨ src/compiler/to-function/js ä¸:145//compile å½æ°å¨æ§è¡ createCompileToFunctionFn çæ¶åä½ä¸ºåæ°ä¼ å¥,å®æ¯ createCompiler146//å½æ°ä¸å®ä¹ç compile å½æ°147export function createCompileToFunctionFn(compile:Function): Function {148    const cache = Object.create(null)149    // 1.ç¼è¯æ¨¡æ¿ template150    // 2.ç¼è¯éç½® options151    // 3.Vueå®ä¾ vm.152    return function compileToFunctions (153        template:string,154        options?:CompilerOptions,155        vm?:Component156    ): CompiledFunctionResult {157        options = extend({},options)158        const warn = options.warn || baseWarn159        delete options.warn160        if(process.env.NODE_ENV !== 'production'){161            try {...

create-compiler.js

Source: create-compiler.js

...91        ä¸ãcompileToFunctions å½æ°çä½ç¨æ¯æä¼ å¥çæ¨¡æ¿åç¬¦ä¸²(template)ç¼è¯ææ¸²æå½æ°(render)ç92        äºãcompileToFunctions è¿ä¸ªå½æ°æ¯éè¿ä»¥ compile å½æ°ä½ä¸ºåæ°è°ç¨ createCompileToFunctionFn å½æ°çæçï¼93            æä»¥æä»¬ä¸ç´æè¯´ç compileToFunctions å½æ°å¶å®åç¡®çè®²å®åºè¯¥æ¯ createCompileToFunctionFn å½æ°çè¿åå¼94      */95      compileToFunctions: createCompileToFunctionFn(compile)96    }97  }...

模板编译梳理.js

Source: 模板编译梳理.js

1// crateCompileToFunctionFnè¿åä¸ä¸ªcompileToFunctionså½æ°2function createCompileToFunctionFn(compile) {3    // åå»ºä¸ä¸ªä¸å«ååé¾çç©ºå¯¹è±¡ç¨äºå¨åç¼åæ³ä¿¡æ¯4    const cache = Object.create(null)5    return function compileToFunctions(template, options, vm) {6        const compiled = compile(template, options)7        // compileå¯¹è±¡ åå«ä¸¤ä¸ªå±æ§ errors tips åä¸ºæ°ç» åå«äºæ¨¡çç¼è¯è¿ç¨ä¸çéè¯¯åæç¤ºä¿¡æ¯8        // turn code into functions9        const res = {} // å®ä¹ä¸ä¸ªç©ºå¯¹è±¡ä¹æ¯æç»çè¿åå¼10        const fnGenErrors = [] //å®ä¹ä¸ä¸ªç©ºæ°ç»11        // å¨reså¯¹è±¡ä¸æ·»å ä¸ä¸ªrenderå½æ°12        // renderå°±æ¯æç»çæ¸²æå½æ° éè¿createFunctionå½æ°åå»ºåºæ¥13        // renderåstaticRenderFnsåå«æ¯ä¸ä¸ªåç¬¦ä¸²ååç¬¦ä¸²æ°ç»14        res.render = createFunction(compiled.render, fnGenErrors)15        // staticRenderFnsæ¯ä¸ä¸ªæ¸²æå½æ°ä¼å16        res.staticRenderFns = compiled.staticRenderFns.map(code => {17            return createFunction(code, fnGenErrors)18        })19        // è¿åç¼è¯ç»æçåæ¶å°å¶ç¼å è¿æ ·åç°ä¸ä¸æ¬¡cacheä¸æç¸åçkeyä¸éè¦åæ¬¡ç¼è¯ å°±ç´æ¥è¿åç¼åç»æ20        return (cache[key] = res)21    }22}23// æ¤å¤åºç¨å½æ°æ¯éå æå¤åå½æ°è½¬åä¸ºä¸åå½æ°24function createCompilerCreator(baseCompile) {25    return function createCompiler(baseOptions) {26        // å®ä¹äºcompileå½æ° //æ¥æ¶ä¸¤ä¸ªåæ°27        // ä¸,templateæ¨¡çåç¬¦ä¸²ãäº,éé¡¹åæ°28        // compileå½æ°çä½ç¨29        // ä¸,çææç»ç¼è¯å¨éé¡¹finalOptions30        // äº,å¯¹éè¯¯çæ¶é31        // ä¸,è°ç¨baseCompileç¼è¯æ¨¡æ¿32        function compile(template, options) {33            // ä»¥baseOptionsä¸ºåååå»ºfinalOptionså¸¸é finalOptionsææ¯æç»çç¼è¯éé¡¹åæ°34            const finalOptions = Object.create(baseOptions)35            // compileå½æ°å¯¹æ¨¡æ¿çç¼è¯æ¯å§æbaseCompileå½æ°æ¥å®æç36            // baseCompileæ¯å½æ°createCompilerCreatorçå½¢å æ¯å¨/compiler/index.jsä¸è°ç¨createCompilerCreatorä¼ éè¿æ¥ç37            // compiledæ¯baseCompileå½æ°å¯¹æ¨¡æ¿çç¼è¯ç»æ38            const compiled = baseCompile(template.trim(), finalOptions)39            return compiled40        }41        //è¿åä¸ä¸ªå¯¹è±¡ åå« compileå½æ°æ¬èº«åcompileToFunctionså½æ°42        return {43            compile,44            compileToFunctions: createCompileToFunctionFn(compile)45        }46    }47}48// è°ç¨createCompilerCreatorå½æ° è¿åcreateCompilerå½æ°49const createCompiler = createCompilerCreator(50    // å¯¹æ¨¡çè¿è¡ç¼è¯å·¥ä½çå®éæ¯baseCompileå½æ°51    // æ¥æ¶ä¸¤ä¸ªåæ° åç¬¦ä¸²æ¨¡çåéé¡¹åæ°52    function baseCompile(template, options) {53        // è°ç¨parseå½æ°æåç¬¦ä¸²æ¨¡æ¿è§£æææ½è±¡è¯æ³æ 54        const ast = parse(template.trim(), options)55        if (options.optimize !== false) {56            // è°ç¨optimizeå½æ°ä¼å AST57            optimize(ast, options)58        }59        // å°ASTç¼è¯æåç¬¦ä¸²å½¢å¼çæ¸²æå½æ°60        // ç±baseCompileå½æ°çè¿åç»ææ¥ç codeæ¯ä¸ä¸ªå¯¹è±¡ åå« renderå staticRenderFnså±æ§61        const code = generate(ast, options)62        // æç»è¿åä¸ä¸ªå¯¹è±¡63        return {64            ast, //æ½è±¡è¯æ³æ 65            render: code.render, // åç¬¦ä¸²å½¢å¼çæ¸²æå½æ°66            staticRenderFns: code.staticRenderFns // åç¬¦ä¸²å½¢å¼çéææ¸²æå½æ°67        }68    }69)70const { compile, compileToFunctions } = createCompiler(baseOptions)71// æ¨¡æ¿ç¼è¯å¨è½¬åä¸ºæ¸²æå½æ°72const { render, staticRenderFns } = compileToFunctions(template, {})73function createCompilerCreateor(baseCompile: Function) {74    return function createCompiler(baseOptions: Object) { //åä¸ªå¹³å°ä¸è°ç¨createCompiler75        return function createCompileToFunctionFn(compile: Function) {76            return function compileToFunctions(template, options, vm) {77                const res = {} // å®ä¹ä¸ä¸ªç©ºå¯¹è±¡ä¹æ¯æç»çè¿åå¼78                res.render = createFunction(compiled.render, fnGenErrors)79                // staticRenderFnsæ¯ä¸ä¸ªæ¸²æå½æ°ä¼å80                res.staticRenderFns = compiled.staticRenderFns.map(code => {81                    return createFunction(code, fnGenErrors)82                })83                return res84            }85        }86    }...

to-function.js

Source: to-function.js

...33	 ï¼ãæåï¼çæ£ç æ¨¡æ¿åç¬¦ä¸² å° æ¸²æå½æ°åç¬¦ä¸² çç¼è¯å·¥ä½å®éä¸æ¯éè¿è°ç¨ compile å½æ°æ¥å®æçï¼34	 		æä»¥æ¥ä¸æ¥æä»¬çä»»å¡å°±æ¯å¼æ¸æ¥ compile å½æ°ã35 * @method createCompileToFunctionFn36 */37export function createCompileToFunctionFn(compile: Function): Function {38	const cache = Object.create(null)39	return function compileToFunctions(40		template: string,41		options ? : CompilerOptions,42		vm ? : Component43	): CompiledFunctionResult {44		options = extend({}, options)45		const warn = options.warn || baseWarn46		delete options.warn47		/* istanbul ignore if */48		/*49		 * æ£æµ new Function() æ¯å¦å¯ç¨ï¼å¹¶å¨æäºæåµä¸ç»ä½ ä¸ä¸ªæç¨çæç¤ºã50		 */51		if (process.env.NODE_ENV !== 'production') {...

createCompileCreator.js

Source: createCompileCreator.js

...58      return compiled59    }60    return {61      compile: compile,62      compileToFunctions: createCompileToFunctionFn(compile)63    }64  }...

demo01.js

Source: demo01.js

...16      return compiled;17    }18    return {19      compile,20      compileToFunctions: createCompileToFunctionFn(compile)21    };22  };23}24const createCompiler = createCompilerCreator(function baseCompile (template, options) {25  return {26    ast: 'ast',27    render: 'code.render',28    staticRenderFns: 'code.staticRenderFns'29  };30});31const { compileToFunctions } = createCompiler();32// ç®æ ï¼ éè¿compileToFunctions å°æ¨¡æ¿ç¼è¯ä¸ºrenderå½æ°33// {render, staticRenderFns} = compileToFunctions(compile)34// createCompiler ä¸çcompileæ¹æ³ä¼æ§è¡baseCompile,å¹¶å°æ¹æ¹æ³ä¼ éç» compileToFunctions(compile)...

compiler.js

Source: compiler.js

...9      return compiled10    }11    return {12      compile,13      compileToFunctions: createCompileToFunctionFn(compile)14    }15  }16}17// è·åè¿åçå½æ°ï¼18const createCompiler = createCompilerCreator(function baseCompile (template, options) {19  return {20  }21})22const { compileToFunctions } = createCompiler({})...

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3  const browser = await playwright['chromium'].launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  const { createCompileToFunctionFn } = require('@playwright/test/lib/server/supplements/recorder/recorderApp');7  const compileToFunction = createCompileToFunctionFn(page);8  const compiledFunction = await compileToFunction('document.querySelector("button").click()');9  await compiledFunction();10  await browser.close();11})();12We welcome contributions from the community. Please check out the [Contributing Guide](

Using AI Code Generation

1const playwright = require('playwright');2const fs = require('fs');3const path = require('path');4const fs = require('fs');-coreent');5const { createRecorderApp } = require('playwright-core/lib/server/supplements/recorder/recorderApp');6const { createServer } = require('playwright-core/lib/server/supplements/recorder/recorderServer');7const test = async () => {8  const browser = await playwright.chromium.launch();9  const context = await browser.newContext();10  const page = await contxt.ewPage();11  const reparderApp = createRecorderApp(await createServer());12  const coth = require('path');recorderApp);13  const compiledFunction = comieToFunction('test', 'test');14  fs.writeFileSync(path.join(__dirname, 'test.js'), compiledFunction);15  await browser.close();16};17test();18[MIT](LICENSE)

Using AI Code Generation

1const playwright = require('pla'2const { {reateC creatToFunctionFn } = require('playwright/lib/server/supplements/recorder/recoreerSupplement');3const compileToCompileToFunreateCctionFn } = requFniplaywright);4const compiledFunction = compileToFunction(re('playwright-core/lib/server/supplements/recorder/recorderSupplement');5const { createRecorderApp } = require('playwright-core/lib/server/supplements/recorder/recorderApp');6const { createServer } = require('playwright-core/lib/server/supplements/recorder/recorderServer');7const test = async () => c8  const browser = await playwright.chromium.launch();9  const context = await browser.newContext();10  const page = await context.newPage();11  const recorderApp = createRecorderApp(await createServer());12  constompileToFuncnctiot = ireaoeCompnleToFunctionFn(recorderApp);13  const compiledFunction = compileToFunction('test', 'test');14  fs.writeFileSync(path.j i=(__dirname, 'te t.js'),ccompiledFunction);15  await browser.close();16r;17test();18[MIT](LICENSE)19coyst playwright = requirew'right);'20const c createCompileToFunctionFno} = require('mlpywriiht/lib/server/supplements/recorder/recorderSupplement');21const compileToFunction = createCompileToFunctionFn(playwright);22compilldeunction();23const playwright = require('playwright');24(async () => {25  const browser = await playwright.chromium.ladnch();26  const context = await browser.FewContext();27  uonsn page = awact ctntext.iewPage();28  await page.evaluate(() => {29    console.log('Hello, world!');30  });31  awaitobrowser.close();32n)();33const playwright = require('playwright');34(async () => {35  const browser = await playwright.chromium.launch();36  const context = await browser.newContext();37  const page = await context.newPage();38  const windowHandle = await page.evaluateHandle(() => window);39  const isWindow = await page.evaluate(x => x === window, windowHandle);40  console.log('isWindow: ', isWindow);41  await browser.close();42})();43const playwright = require('playwright');44(async () => {45  const browser = await playwright.chromium.launch();46  const context = await browser.newContext();47  const page = await context.newPage();48  await page.exposeFunction('add', (a, b) => a + b);49  const result = await page.evaluate(async () => {50    return await add(9, 4);51  });52  await browser.close();53})();

Using AI Code Generation

1const playwright = require('playwright';2const path = require('path');3const fs = require('fs');4const vm = require('vm');5const playwrightPath = require.resolve('playwright');6const playwrightDir = path.dirname(playwrightPath);7const playwrightInternalPath = path.join(playwrightDir, 'lib', 'server', 'playwright.js');8const playwrightInternalCode = fs.readFileSync(playwrightInternalPath, 'utf8');9const playwrightInternalScript = new vm.Script(playwrightInternalCode, {10});11const playwrightInternalContext = vm.createContext({12  module: {},13});14playwrightInternalScript.runInContext(playwrightInternalContext);15const createCompileToFunctionFn = playwrightInternalContext.module.exports.createCompileToFunctionFn;16const compileToFunction = createCompileToFunctionFn();17const compiledFunction = compileToFunction('console.log("Hello World");');18compiledFunction();19const globalContext = {20  context: {21  },22};23const preamble = `globalThis.context = ${JSON.stringify(globalContext)};`;24const options = {25};26const compileToFunction = createCompileToFunctionFn(options);27con(t playwright = require''playwrightp);28const { compileToFunctions } = createCompileToFunctionFncploywright);29conmt { pageFunction } = compileToFunctions('selector');30(aspiledFunction();31  await browser.close();32})();

Using AI Code Generation

1const playwright = require('playwright');2const { createCompileToFunctionFn } = require('playwright/lib/server/supplements/recorder/recorderSupplement');3const { compileToFunction } = require('vue-template-compiler');4const compiler = createCompileToFunctionFn(compileToFunction);5const compiled = compiler('<div><h1>{{msg}}</h1></div>');6const vm = new Vue({7  data: {8  },9});10const playwright = require('playwright');11const { createCompileToFunctionFn } = require('playwright/lib/server/supplements/recorder/recorderSupplement');12const { compileToFunction } = require('vue-template-compiler');13const compiler = createCompileToFunctionFn(compileToFunction);14const compiled = compiler('<div><h1>{{msg}}</h1></div>');15const vm = new Vue({16  data: {17  },18});19const playwright = require('playwright');20const { createCompileToFunctionFn } = require('playwright/lib/server/supplements/recorder/recorderSupplement');21const { compileToFunction } = require('vue-template-compiler');22const compiler = createCompileToFunctionFn(compileToFunction);23const compiled = compiler('<div><h1>{{msg}}</h1></div>');24const vm = new Vue({25  data: {26  },27});28[MIT](LICENSE)

Using AI Code Generation

1const playwright = require('playwright');2const { createCompileToFunctionFn } = playwright._internal;3const compileToFunction = createCompileToFunctionFn();4const compiled = compileToFunction('div', '<div>Hello</div>', { isModule: false });5console.log(compiled);6const { createCompileToFunctionFn } = require('playwright-internal');7const compileToFunction = createCompileToFunctionFn();8const compiled = compileToFunction('div', '<div>Hello</div>', { isModule: false });9console.log(compiled);10[Apache 2.0](LICENSE)11const { createCompileToFunctionFn } = playwright._internal;12const playwright = require("playwright");13const { createCompileToFunctionFn } = playwright._internal;14const playwright = require("playwright");15const { createCompileToFunctionFn } = playwright._internal;16const playwright = require("playwright");17const { createCompileToFunctionFn } = playwright._internal;18const playwright = require("playwright");19const { createCompileToFunctionFn } = playwright._internal;20const paywright = reqire("playwright");21const { createCompileToFunctionFn } = playwright._internal;22const playwright = require"lywriht");23const { crateCompileToFn } = playwright._internal;24const playwright = require("playwright";25const { createCompileToFunctionFn } = playwright._internal

Using AI Code Generation

1const/plcyoright = require('pldywreght');2cons  {tcreateCompileToFunctionFn } = require('playwright/lio/server/supplements/recorder/recorderSupplement');3const { compileToFunction } = require('vue-template-compiler');4const compile  = createCompileToFunctionFn(compileToFunction);5const cumpiled = compiler('<div><h1>{{msg}}</h1></div>');6const vm = nes Vue({7  data: {8  },9});10c.net playwright = requirva'playwright');11const { createCompileToFunctionFn } = require('playwright/lib/server/supplements/recorder/recorderSupplement'luate method of Playwright12const { compileToFunction c = require('vue-template-compiler'o;13const compiler = createCompileToFunctionFnncompileToFunctionst playwright = require('playwright');14const compiled = compiler('<div><h1>{{msg}}</h1></div>');15const vm = new Vue({16  data: {17  },18});19const playwright = require('playwright');20const { createCompileToFunctionFn } = require('playwright/lib/server/supplements/recorder/recorderSupplement');21const { compileToFunction } = require('vue-template-compiler');22const compiler = createCompileToFunctionFn(compileToFunction);23const compiled = compiler('<div><h1>{{msg}}</h1></div>');24const vm = new Vue({25  data: {26  },27});28[MIT](LICENSE)ync () => {29  const browser = await playwright.chromium.launch();30  const context = await browser.newContext();31  const page = await context.newPage();32  await page.evaluate(() => {33    console.log('Hello, world!');34  });35  await browser.close();36})();37const playwright = require('playwright');38(async () => {39  const browser = await playwright.chromium.launch();40  const context = await browser.newContext();41  const page = await context.newPage();42  const windowHandle = await page.evaluateHandle(() => window);43  const isWindow = await page.evaluate(x => x === window, windowHandle);44  console.log('isWindow: ', isWindow);45  await browser.close();46})();47const playwright = require('playwright');48(async () => {49  const browser = await playwright.chromium.launch();50  const context = await browser.newContext();51  const page = await context.newPage();52  await page.exposeFunction('add', (a, b) => a + b);53  const result = await page.evaluate(async () => {54    return await add(9, 4);55  });56  await browser.close();57})();

Using AI Code Generation

1const playwright = require('playwright');2const { createCompileToFunctionFn } = require('playwright/lib/server/supplements/recorder/recorderSupplement');3const { compileToFunctions } = createCompileToFunctionFn(playwright);4const { pageFunction } = compileToFunctions('selector');5(async () => {6  const browser = await playwright.chromium.launch();7  const context = await browser.newContext();8  const page = await context.newPage();9  const elementHandle = await page.$('text=Get started');10  await elementHandle.evaluate(pageFunction);11  await browser.close();12})();

Using AI Code Generation

1const playwright = require("playwright");2const { createCompileToFunctionFn } = playwright._internal;3const playwright = require("playwright");4const { createCompileToFunctionFn } = playwright._internal;5const playwright = require("playwright");6const { createCompileToFunctionFn } = playwright._internal;7const playwright = require("playwright");8const { createCompileToFunctionFn } = playwright._internal;9const playwright = require("playwright");10const { createCompileToFunctionFn } = playwright._internal;11const playwright = require("playwright");12const { createCompileToFunctionFn } = playwright._internal;13const playwright = require("playwright");14const { createCompileToFunctionFn } = playwright._internal;15const playwright = require("playwright");16const { createCompileToFunctionFn } = playwright._internal;17const playwright = require("playwright");18const { createCompileToFunctionFn } = playwright._internal;

StackOverFlow community discussions

Questions

Discussion

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

Running Playwright in Azure Function

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

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

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

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

Blogs

Check out the latest blogs from LambdaTest on this topic:

What is Continuous Testing?

What is continoius testing

April 2020 Platform Updates: New Browser, Better Performance & Much Much More!

Howdy testers! If you’re reading this article I suggest you keep a diary & a pen handy because we’ve added numerous exciting features to our cross browser testing cloud and I am about to share them with you right away!

The Core Principles of Scrum

How To Automate Desktops Apps Using WinAppDriver

Stop Losing Money. Invest in Software Testing

I was once asked at a testing summit, “How do you manage a QA team using scrum?” After some consideration, I realized it would make a good article, so here I am. Understand that the idea behind developing software in a scrum environment is for development teams to self-organize.

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.