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How to use addScriptContent method in Playwright Internal

Best JavaScript code snippet using playwright-internal

FrameManager.js

...287     * @param {string} content288     * @param {string} type289     * @return {!HTMLElement}290     */291    function addScriptContent(content, type = 'text/javascript') {292      const script = document.createElement('script');293      script.type = type;294      script.text = content;295      document.head.appendChild(script);296      return script;297    }298  }299  /**300   * @param {Object} options301   * @return {!Promise<!ElementHandle>}302   */303  async addStyleTag(options) {304    if (typeof options.url === 'string') {305      const url = options.url;...

DOMWorld.js

Source: DOMWorld.js

...165     * @param {string} content166     * @param {string} type167     * @return {!HTMLElement}168     */169    function addScriptContent(content, type = 'text/javascript') {170      const script = document.createElement('script');171      script.type = type;172      script.text = content;173      let error = null;174      script.onerror = e => error = e;175      document.head.appendChild(script);176      if (error)177        throw error;178      return script;179    }180  }181  /**182   * @param {!{content?: string, path?: string, url?: string}} options183   * @return {!Promise<!ElementHandle>}...

helpers.js

Source: helpers.js

1import { SERVER_URL } from "../constant"2export const removeElement = elementId => {3  const element = document.getElementById(elementId)4  !!element && element.parentNode.removeChild(element)5}6/**7 * Add Script8 * @param {*} src 9 * @param {*} id 10 * @param {*} async 11 * @param {*} selector 12 */13export const addScript = (src, id, async = true, selector = false) => {14  document.querySelectorAll(`script#${id}`)15    .forEach(e => e.parentNode.removeChild(e))16  const script = document.createElement('script')17  script.src = src18  script.id = id19  script.async = async20  const element = !!selector ? document.getElementById(selector) : false21  !!element ?22    element.parentNode.insertBefore(script, element.nextSibling) :23    document.head.appendChild(script)24}25/**26 * Add script content27 * @param {*} content 28 * @param {*} id 29 * @param {*} selector 30 */31export const addScriptContent = (content, id, selector = false) => {32  document.querySelectorAll(`script#${id}`)33    .forEach(e => e.parentNode.removeChild(e))34  const script = document.createElement('script')35  script.type = 'text/javascript'36  script.id = id37  const textNode = document.createTextNode(content)38  script.appendChild(textNode)39  const element = !!selector ? document.getElementById(selector) : false40  !!element ?41    element.parentNode.insertBefore(script, element.nextSibling) :42    document.head.appendChild(script)43}44export const waitForScript = (name, timeout = 3) => {45  return new Promise(resolve => {46    let waited = 047    function wait(interval) {48      setTimeout(() => {49        waited += interval50        if (window[name] !== undefined)51          return resolve(true)52        else if (waited >= timeout * 1000)53          return resolve(false)54        wait(interval * 2)55      }, interval)56    }57    return wait(500)58  })59}60/**61 * Prepare request62 * @param {*} method 63 * @param {*} url 64 * @param {*} data 65 * @param {*} dataType 66 * @param {*} contentType 67  */68export const prepareRequest = async (method, url, data, dataType, contentType) =>69  new Promise((resolve, reject) => {70    const serverUrl = SERVER_URL + url71    fetch(serverUrl, {72      method,73      headers: {74        'Accept': 'application/json',75        'Content-Type': 'application/json'76      },77      credentials: "include",78      ...(data && { 'body': data }),79      ...(dataType && { 'dataType': dataType }),80      ...(contentType && { 'contentType': contentType })81    })82      .then(res => res.json())83      .then(result => resolve(result))84      .catch(error => reject(error))...

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    await page.addScriptContent({7        content: 'window.__FOO = 10;'8    });9    await page.screenshot({ path: `example.png` });10    await browser.close();11})();

Using AI Code Generation

1const { addScriptContent } = require('playwright/lib/server/frames');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 addScriptContent(page, 'alert("Hello, World!");');8  await page.waitForTimeout(3000);9  await browser.close();10})();11addInitScript(page, script[, arg1[, arg2[, ...]]])12const { addInitScript } = require('playwright/lib/server/frames');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  await addInitScript(page, 'alert("Hello, World!");');19  await page.waitForTimeout(3000);20  await browser.close();21})();22addInitScript(page, script[, arg1[, arg2[, ...]]])

Using AI Code Generation

1const playwright = require("playwright");2const { addScriptContent } = require("playwright/lib/server/injected/injectedScript");3(async () => {4  for (const browserType of BROWSER) {5    const browser = await playwright[browserType].launch();6    const context = await browser.newContext();7    const page = await context.newPage();8    const handle = await page.evaluateHandle(() => document.body);9    await addScriptContent(handle, 'console.log("Hello World")');10    await browser.close();11  }12})();

Using AI Code Generation

1const { addScriptContent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch({ headless: false });5  const page = await browser.newPage();6  await addScriptContent(page, 'console.log("Hello World")');7  await page.close();8  await browser.close();9})();10const { addScriptUrl } = require('playwright/lib/server/supplements/recorder/recorderSupplement');11const { chromium } = require('playwright');12(async () => {13  const browser = await chromium.launch({ headless: false });14  const page = await browser.newPage();15  await page.close();16  await browser.close();17})();18const { addScriptContent } = require('playwright/lib/server/supplements/recorder/recorderSupplement');19const { chromium } = require('playwright');20(async () => {21  const browser = await chromium.launch({ headless: false });22  const page = await browser.newPage();23  await addScriptContent(page, 'console.log("Hello World")');24  await page.close();25  await browser.close();26})();27const { addScriptUrl } = require('playwright/lib/server/supplements/recorder/recorderSupplement');28const { chromium } = require('playwright');29(async () => {30  const browser = await chromium.launch({ headless: false });31  const page = await browser.newPage();32  await page.close();33  await browser.close();34})();35const { addScriptContent } = require('playwright/lib/server/supplements/rec

Using AI Code Generation

1const {chromium} = require('playwright');2(async () => {3    const browser = await chromium.launch();4    const context = await browser.newContext();5    await context.addInitScript(() => {6        window.foo = 'bar';7    });8    const page = await context.newPage();9    console.log(await page.evaluate(() => window.foo));10    await browser.close();11})();12const {chromium} = require('playwright');13(async () => {14    const browser = await chromium.launch();15    const context = await browser.newContext();16    await context.addInitScript({path: './script.js'});17    const page = await context.newPage();18    console.log(await page.evaluate(() => window.foo));19    await browser.close();20})();21const {chromium} = require('playwright');22(async () => {23    const browser = await chromium.launch();24    const context = await browser.newContext();25    const page = await context.newPage();26    console.log(await page.evaluate(() => window.foo));27    await browser.close();28})();29const {chromium} = require('playwright');30(async () => {31    const browser = await chromium.launch();32    const context = await browser.newContext();33    await context.addInitScript({path: './script.js', type: 'module'});34    const page = await context.newPage();35    console.log(await page.evaluate(() => window.foo));36    await browser.close();37})();38const {chromium} = require('playwright');39(async () => {40    const browser = await chromium.launch();41    const context = await browser.newContext();42    await context.addInitScript({content: 'window.foo = "bar";', type: 'module'});

Using AI Code Generation

1const {chromium} = require('playwright');2(async () => {3  const browser = await chromium.launch({4  });5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.addScriptContent({content: 'console.log("Hello World");'});8  await page.waitForTimeout(5000);9  await browser.close();10})();11const {chromium} = require('playwright');12(async () => {13  const browser = await chromium.launch({14  });15  const context = await browser.newContext();16  const page = await context.newPage();17  await page.waitForTimeout(5000);18  await browser.close();19})();20const {chromium} = require('playwright');21(async () => {22  const browser = await chromium.launch({23  });24  const context = await browser.newContext();25  const page = await context.newPage();

Using AI Code Generation

1const { addScriptContent } = require('playwright/lib/server/browserContext');2const { test } = require('playwright');3(async () => {4  const browser = await test.launchChromium();5  const page = await browser.newPage();6  await addScriptContent(page, 'window.foo = "bar";');7  await page.waitForSelector('text=bar');8  await browser.close();9})();10const { addScriptContent } = require('playwright/lib/server/browserContext');11const { test } = require('playwright');12(async () => {13  const browser = await test.launchChromium();14  const page = await browser.newPage();15  await addScriptContent(page, 'window.foo = "bar";');16  await page.waitForSelector('text=bar');17  await browser.close();18})();19const { addScriptContent } = require('playwright/lib/server/browserContext');20const { test } = require('playwright');21(async () => {22  const browser = await test.launchChromium();23  const page = await browser.newPage();24  await addScriptContent(page, 'window.foo = "bar";');25  await page.waitForSelector('text=bar');26  await browser.close();27})();28const { addScriptContent } = require('playwright/lib/server/browserContext');29const { test } = require('playwright');30(async () => {31  const browser = await test.launchChromium();32  const page = await browser.newPage();33  await addScriptContent(page, 'window.foo = "bar";');

Using AI Code Generation

1const { addScriptContent } = require('@playwright/test/lib/server/injectedScript');2const { context } = require('@playwright/test/lib/server/browserContext');3const { page } = require('@playwright/test/lib/server/page');4const { Page, BrowserContext } = require('@playwright/test/lib/server/chromium/crTypes');5const { addScriptContent } = require('@playwright/test/lib/server/injectedScript');6const { context } = require('@playwright/test/lib/server/browserContext');7const { page } = require('@playwright/test/lib/server/page');8const { Page, BrowserContext } = require('@playwright/test/lib/server/chromium/crTypes');9const { chromium } = require('playwright');10(async () => {11  const browser = await chromium.launch();12  const context = await browser.newContext();13  const page = await context.newPage();14  const { addScriptContent } = require('@playwright/test/lib/server/injectedScript');15  const { context } = require('@playwright/test/lib/server/browserContext');16  const { page } = require('@playwright/test/lib/server/page');17  const { Page, BrowserContext } = require('@playwright/test/lib/server/chromium/crTypes');18  await page.screenshot({ path: `example.png` });19  await browser.close();20})();21const { chromium } = require('playwright');22(async () => {23  const browser = await chromium.launch();24  const context = await browser.newContext();25  const page = await context.newPage();26  await page.addInitScript({27    content: 'window.foo = "bar";',28  });29  await page.screenshot({ path: `example.png` });30  await browser.close();31})();

Using AI Code Generation

1import { addScriptContent } from 'playwright-core/lib/server/injected/injectedScript';2import { createPlaywright } from 'playwright-core/lib/server/createPlaywright';3const playwright = createPlaywright('chromium');4const browser = await playwright.chromium.launch();5const context = await browser.newContext();6const page = await context.newPage();7await addScriptContent(page, 'console.log("Hello world")');8import { test } from '@playwright/test';9test('test', async ({ page }) => {10});11MIT © [Rajesh R](

Using AI Code Generation

1const playwright = require('@playwright/test');2const { addScriptContent } = require('@playwright/test/lib/server/injectedScript');3const { chromium } = require('playwright');4const { test, expect } = playwright;5(async () => {6  const browser = await chromium.launch();7  const context = await browser.newContext();8  const page = await context.newPage();9  await addScriptContent(page, 'window.test = "test";');10  console.log(await page.evaluate(() => window.test));11  await browser.close();12})();13const playwright = require('@playwright/test');14const { addInitScript } = require('@playwright/test/lib/server/injectedScript');15const { chromium } = require('playwright');16const { test, expect } = playwright;17(async () => {18  const browser = await chromium.launch();19  const context = await browser.newContext();20  await addInitScript(context, 'window.test = "test";');21  const page = await context.newPage();22  console.log(await page.evaluate(() => window.test));23  await browser.close();24})();

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

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

Running Playwright in Azure Function

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

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

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

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