How to use polyfillBind method in Playwright Internal

Best JavaScript code snippet using playwright-internal

bind.js

Source: bind.js Github

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...41 * @param {*} fn42 * @param {*} ctx43 * @returns44 */​45function polyfillBind(fn, ctx) {46 function boundFn(a) {47 const len = arguments.length;48 return len49 ? len > 150 ? fn.apply(ctx, arguments)51 : fn.call(ctx, a)52 : fn.call(ctx);53 }54 boundFn._length = fn.length;55 return boundFn;56}57/​**58 * 原生自带bind函数59 * @param {*} fn...

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bindCallApply.js

Source: bindCallApply.js Github

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1Function.prototype.myCall = function(context, ...parameter) {2 if (typeof context === 'object') {3 context = context || window;4 } else {5 context = Object.create(null);6 }7 let fn = Symbol();8 context[fn] = this;9 context[fn](...parameter);10 delete context[fn];11}1213Function.prototype.myApply = function(context, parameter) {14 if (typeof context === 'object') {15 context = context || window;16 } else {17 context = Object.create(null);18 }19 let fn = Symbol();20 context[fn] = this;21 context[fn](...parameter);22 delete context[fn];23}2425Function.prototype.myBind = function (context, ...innerArgs) {26 let me = this27 return function (...finnalyArgs) {28 return me.call(context, ...innerArgs, ...finnalyArgs)29 }30}3132sayHi.myApply(person, [25, 男]); /​/​ Abiel 25 男3334let person = {35 name: 'Abiel'36}37function sayHi(age, sex) {38 console.log(this.name, age, sex);39}40sayHi.myCall(person, 25, 男); /​/​ Abiel 25 男414243/​/​ vue bind手写4445function polyfillBind (fn, ctx) {46 function boundFn (a) {47 var l = arguments.length;48 return l ? (l > 1 ? fn.apply(ctx, arguments) : fn.call(ctx, a)) : fn.call(ctx)49 }5051 boundFn._length = fn.length;52 return boundFn53}5455function nativeBind (fn, ctx) {56 return fn.bind(ctx)57}5859var bind = Function.prototype.bind60 ? nativeBind ...

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bind-settimeout.js

Source: bind-settimeout.js Github

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1function polyfillBind(func, target, ...params) {2 /​/​ func 是不是函数3 /​/​ target 判断4 console.log(func)5 /​/​ 收集传入的参数6 const args = params;7 return function () {8 return func.apply(target, args.concat(...arguments));9 }10}11function LateBloomer() {12 this.petalCount = Math.ceil(Math.random() * 12) + 1;13}14/​/​ 在 1 秒钟后声明 bloom15LateBloomer.prototype.bloom = function() {16 /​/​ setTimeout(this.declare.bind(this), 1000);17 setTimeout( polyfillBind(this.declare, this) , 1000);18};19LateBloomer.prototype.declare = function() {20 console.log('I am a beautiful flower with ' +21 this.petalCount + ' petals!');22};23var flower = new LateBloomer();...

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bind-partially.js

Source: bind-partially.js Github

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1function polyfillBind(func, target, ...params) {2 /​/​ func 是不是函数3 /​/​ target 判断4 console.log(func)5 /​/​ 收集传入的参数6 const args = params;7 return function () {8 return func.apply(target, args.concat(...arguments));9 }10}11function list() {12 return Array.prototype.slice.call(arguments);13}14var list1 = list(1, 2, 3); /​/​ [1, 2, 3]15/​/​ Create a function with a preset leading argument16/​/​ var leadingThirtysevenList = list.bind(null, 37);17var leadingThirtysevenList = polyfillBind(list, null, 37);18var list2 = leadingThirtysevenList();19/​/​ [37]20console.log(list2);21var list3 = leadingThirtysevenList(1, 2, 3);22console.log(list3);...

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index.test.js

Source: index.test.js Github

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...8/​/​ /​/​ console.log(params);9/​/​ console.log(this.name);10/​/​ }11/​/​ /​/​ 测试绑定1 通过12/​/​ let test1 = polyfillBind(toBindFunc, targetObj);13/​/​ test1('test1');14/​/​ console.log(targetObj)15/​/​ console.log(targetObj.name);16/​/​ var test2 = polyfillBind(toBindFunc, targetObj, 'test2')17/​/​ test2()18/​/​ console.log(targetObj.name)19/​/​ 测试绑定2 带有参数20/​/​ let test2 = polyfillBind(toBindFunc, targetObj, 'test2');21/​/​ test2();...

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base_bind.js

Source: base_bind.js Github

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1function polyfillBind(fn, ctx) {2 function boundFn(a) {3 const l = arguments.length;4 return l ?5 l > 1 ?6 fn.apply(ctx, arguments) :7 fn.call(ctx, a) :8 fn.call(ctx)9 }10 boundFn._length = fn.length11 return boundFn12}13let bind = polyfillBind;14function User() {15 this.name = 'aaaa'...

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vue.ployfillBind.js

Source: vue.ployfillBind.js Github

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1function polyfillBind(fn, ctx) {2 function boundFn(a) {3 var l = arguments.length;4 return l5 ? l > 16 ? fn.apply(ctx, arguments)7 : fn.call(ctx, a)8 : fn.call(ctx)9 }10 boundFn._length = fn.length;11 return boundFn12}13function nativeBind (fn, ctx) {14 return fn.bind(ctx)15}...

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bind-func.js

Source: bind-func.js Github

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1function polyfillBind(func, target, ...params) {2 /​/​ func 是不是函数3 /​/​ target 判断4 console.log(func)5 /​/​ 收集传入的参数6 const args = params;7 return function () {8 return func.apply(target, args.concat(...arguments));9 }10}11var obj = {}12function a(name) {13 this.name = name;14}15var re = polyfillBind(a, obj, 9000);16re();...

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Using AI Code Generation

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1const { polyfillBind } = require('playwright/​lib/​utils/​utils');2const { chromium } = require('playwright');3(async () => {4 const browser = await chromium.launch();5 const page = await browser.newPage();6 await page.fill('input[aria-label="Search"]', 'Playwright');7 const search = await page.$('input[value="Google Search"]');8 await polyfillBind(search, 'click', page)();9 await page.screenshot({ path: `example.png` });10 await browser.close();11})();12[MIT](

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Using AI Code Generation

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1const { polyfillBind } = require('playwright-core/​lib/​utils/​utils');2const { chromium } = require('playwright-core');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 const { consoleMessage } = await page.evaluateHandle(() => {8 return {9 consoleMessage: console.log.bind(console, 'hello'),10 };11 });12 await consoleMessage.jsonValue();13 await browser.close();14})();

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Using AI Code Generation

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1const { polyfillBind } = require('playwright/​lib/​internal/​inspectorInstrumentation');2const { chromium } = require('playwright');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 await polyfillBind(page);8 await page.click('text=Get started');9 await page.click('text=Docs');10 await page.click('text=API');

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Using AI Code Generation

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1const { polyfillBind } = require('playwright/​lib/​utils/​utils');2const { Page } = require('playwright/​lib/​server/​page');3const { ElementHandle } = require('playwright/​lib/​server/​dom');4const { JSHandle } = require('playwright/​lib/​server/​jsHandle');5const { Frame } = require('playwright/​lib/​server/​frame');6const { assert } = require('playwright/​lib/​utils/​utils');7const { helper } = require('playwright/​lib/​helper');8const { TimeoutError } = require('playwright/​lib/​errors');9const { EventEmitter } = require('events');10Page.prototype.polyfillBind = function () {11 polyfillBind(ElementHandle.prototype, 'waitForSelector', async function (selector, options, ...args) {12 const { state = 'visible', timeout = this._page._timeoutSettings.timeout() } = options || {};13 const info = await this._page._delegate.waitForSelectorInPage(selector, state, timeout);14 const handle = await this._adoptBackendNodeId(info.backendNodeId);15 const result = await handle.evaluate(element => !!element, ...args);16 if (result)17 return handle;18 await handle.dispose();19 throw new TimeoutError(`waiting for selector "${selector}" failed: timeout ${timeout}ms exceeded`);20 });21 polyfillBind(JSHandle.prototype, 'waitForSelector', async function (selector, options, ...args) {22 const { state = 'visible', timeout = this._context._timeoutSettings.timeout() } = options || {};23 const info = await this._context._delegate.waitForSelectorInPage(selector, state, timeout);24 const handle = await this._adoptBackendNodeId(info.backendNodeId);25 const result = await handle.evaluate(element => !!element, ...args);26 if (result)27 return handle;28 await handle.dispose();29 throw new TimeoutError(`waiting for selector "${selector}" failed: timeout ${timeout}ms exceeded`);30 });31 polyfillBind(Frame.prototype, 'waitForSelector', async function (selector, options, ...args) {32 const { state = 'visible', timeout = this._page._timeoutSettings.timeout() } = options || {};33 const info = await this._page._delegate.waitForSelectorInPage(selector, state, timeout);

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Using AI Code Generation

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1const { polyfillBind } = require('playwright/​lib/​utils/​utils');2const { Page } = require('playwright/​lib/​server/​page');3polyfillBind(Page.prototype);4const { polyfillBind } = require('playwright/​lib/​utils/​utils');5const { Page } = require('playwright/​lib/​server/​page');6polyfillBind(Page.prototype);7const { polyfillBind } = require('playwright/​lib/​utils/​utils');8const { Page } = require('playwright/​lib/​server/​page');9polyfillBind(Page.prototype);10const { polyfillBind } = require('playwright/​lib/​utils/​utils');11const { Page } = require('playwright/​lib/​server/​page');12polyfillBind(Page.prototype);13const { polyfillBind } = require('playwright/​lib/​utils/​utils');14const { Page } = require('playwright/​lib/​server/​page');15polyfillBind(Page.prototype);

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Using AI Code Generation

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1const { polyfillBind } = require('playwright-core/​lib/​utils/​utils')2const { Page } = require('playwright-core/​lib/​server/​page')3polyfillBind(Page.prototype, 'pageFunction', 3)4Page.prototype.pageFunction = async function (expression, arg, isFunction) {5 return this._delegate.pageFunction(expression, arg, isFunction)6}7polyfillBind(Page.prototype, 'exposeBinding', 2)8Page.prototype.exposeBinding = async function (name, binding) {9 return this._delegate.exposeBinding(name, binding)10}11const { chromium } = require('playwright-core');12(async () => {13 const browser = await chromium.launch({ headless: false });14 const context = await browser.newContext();15 const page = await context.newPage();16 await page.exposeBinding('myFunction', async ({ page }, arg) => {17 console.log('myFunction called with arg:', arg);18 return 'Hello from myFunction!';19 });20 const result = await page.evaluate(async () => {21 return await window.myFunction('Playwright');22 });23 console.log('myFunction returned:', result);24 await browser.close();25})();

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Using AI Code Generation

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1const { polyfillBind } = require('@playwright/​test/​lib/​server/​browserContext');2polyfillBind(page);3const { polyfillBind } = require('@playwright/​test/​lib/​server/​browserContext');4polyfillBind(page);5const { polyfillBind } = require('@playwright/​test/​lib/​server/​browserContext');6polyfillBind(page);7const { polyfillBind } = require('@playwright/​test/​lib/​server/​browserContext');8polyfillBind(page);9const { polyfillBind } = require('@playwright/​test/​lib/​server/​browserContext');10polyfillBind(page);11const { polyfillBind } = require('@playwright/​test/​lib/​server/​browserContext');12polyfillBind(page);13const { polyfillBind } = require('@playwright/​test/​lib/​server/​browserContext');14polyfillBind(page);15const { polyfillBind } = require('@playwright/​test/​lib/​server/​browserContext');16polyfillBind(page);

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Using AI Code Generation

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1const { polyfillBind } = require('playwright/​lib/​utils/​utils');2const { chromium } = require('playwright');3(async () => {4 const browser = await chromium.launch();5 const page = await browser.newPage();6 await page.screenshot({ path: `example.png` });7 await browser.close();8})();9#### Playwright.executablePath()10- `PLAYWRIGHT_BROWSERS_${browserName}` environment variable11- `browsers.${browserName}` option when launching Playwright12- `PLAYWRIGHT_BROWSERS_${browserName}_PATH` environment variable13- `browsers.${browserName}.path` option when launching Playwright14- `PLAYWRIGHT_BROWSERS_${browserName}_CHANNEL` environment variable15- `browsers.${browserName}.channel` option when launching Playwright16- `PLAYWRIGHT_BROWSERS_${browserName}_${platform}` environment variable17- `browsers.${browserName}.${platform}` option when launching Playwright18- `PLAYWRIGHT_BROWSERS_${browserName}_${platform}_PATH` environment variable19- `browsers.${browserName}.${platform}.path` option when launching Playwright20- `PLAYWRIGHT_BROWSERS_${browserName}_${platform}_CHANNEL` environment variable21- `browsers.${browserName}.${platform}.channel` option when launching Playwright22- `PLAYWRIGHT_BROWSERS_${browserName}_${platform}_${arch}` environment variable23- `browsers.${browserName}.${platform}.${arch}` option when launching Playwright24- `PLAYWRIGHT_BROWSERS_${browserName}_${platform}_${arch}_PATH` environment variable25- `browsers.${browserName

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StackOverFlow community discussions

Questions
Discussion

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

firefox browser does not start in playwright

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

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

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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