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How to use scrollIntoViewIfNeeded method in Playwright Internal

Best JavaScript code snippet using playwright-internal

browser_layoutHelpers.js

...15  // The tests start with a black 2x2 pixels square below bottom right.16  // Do not resize the window during the tests.17  let xPos = Math.floor(win.innerWidth / 2);18  win.scroll(xPos, win.innerHeight + 2);  // Above the viewport.19  scrollIntoViewIfNeeded(some);20  is(win.scrollY, Math.floor(win.innerHeight / 2) + 1,21     "Element completely hidden above should appear centered.");22  is(win.scrollX, xPos,23     "scrollX position has not changed.");24  win.scroll(win.innerWidth / 2, win.innerHeight + 1);  // On the top edge.25  scrollIntoViewIfNeeded(some);26  is(win.scrollY, win.innerHeight,27     "Element partially visible above should appear above.");28  is(win.scrollX, xPos,29     "scrollX position has not changed.");30  win.scroll(win.innerWidth / 2, 0);  // Just below the viewport.31  scrollIntoViewIfNeeded(some);32  is(win.scrollY, Math.floor(win.innerHeight / 2) + 1,33     "Element completely hidden below should appear centered.");34  is(win.scrollX, xPos,35     "scrollX position has not changed.");36  win.scroll(win.innerWidth / 2, 1);  // On the bottom edge.37  scrollIntoViewIfNeeded(some);38  is(win.scrollY, 2,39     "Element partially visible below should appear below.");40  is(win.scrollX, xPos,41     "scrollX position has not changed.");42  win.scroll(win.innerWidth / 2, win.innerHeight + 2);  // Above the viewport.43  scrollIntoViewIfNeeded(some, false);44  is(win.scrollY, win.innerHeight,45     "Element completely hidden above should appear above " +46     "if parameter is false.");47  is(win.scrollX, xPos,48     "scrollX position has not changed.");49  win.scroll(win.innerWidth / 2, win.innerHeight + 1);  // On the top edge.50  scrollIntoViewIfNeeded(some, false);51  is(win.scrollY, win.innerHeight,52     "Element partially visible above should appear above " +53     "if parameter is false.");54  is(win.scrollX, xPos,55     "scrollX position has not changed.");56  win.scroll(win.innerWidth / 2, 0);  // Below the viewport.57  scrollIntoViewIfNeeded(some, false);58  is(win.scrollY, 2,59     "Element completely hidden below should appear below " +60     "if parameter is false.");61  is(win.scrollX, xPos,62     "scrollX position has not changed.");63  win.scroll(win.innerWidth / 2, 1);  // On the bottom edge.64  scrollIntoViewIfNeeded(some, false);65  is(win.scrollY, 2,66     "Element partially visible below should appear below " +67     "if parameter is false.");68  is(win.scrollX, xPos,69     "scrollX position has not changed.");...

index.test.js

Source: index.test.js

1import React from 'react';2import { shallow } from 'enzyme';3import ScrollIntoViewIfNeeded from '..';4import mockScroll from '../../__mocks__/scroll-into-view-if-needed';5const MockChild = () => (6  <div>7    Yo8  </div>9);10test('Render with no props', () => {11  const wrapper = shallow(12    <ScrollIntoViewIfNeeded>13      <MockChild />14    </ScrollIntoViewIfNeeded>,15  );16  expect(wrapper).toMatchSnapshot();17  expect(mockScroll).toHaveBeenCalledTimes(1);18  expect(mockScroll).toHaveBeenCalledWith(null, {19    behavior: 'smooth',20    scrollMode: 'if-needed',21  });22});23test('Render in inactive state, then toggle active state', () => {24  const wrapper = shallow(25    <ScrollIntoViewIfNeeded active={false}>26      <MockChild />27    </ScrollIntoViewIfNeeded>,28  );29  expect(wrapper).toMatchSnapshot();30  expect(mockScroll).toHaveBeenCalledTimes(1);31  wrapper.setProps({ active: true });32  expect(mockScroll).toHaveBeenCalledTimes(2);33});34test('Expect `scroll-into-view-if-needed` to _not_ be called on prop update if still not active', () => {35  const wrapper = shallow(36    <ScrollIntoViewIfNeeded active={false}>37      <MockChild />38    </ScrollIntoViewIfNeeded>,39  );40  expect(mockScroll).toHaveBeenCalledTimes(2);41  wrapper.setProps({ className: 'something' });42  expect(mockScroll).toHaveBeenCalledTimes(2);43});44test('Expect element attributes to be forwarded', () => {45  const wrapper = shallow(46    <ScrollIntoViewIfNeeded className="test">47      <MockChild />48    </ScrollIntoViewIfNeeded>,49  );50  expect(wrapper.find('.test').length).toBe(1);51});52test('Expect elementType to be respected', () => {53  const wrapper = shallow(54    <ScrollIntoViewIfNeeded elementType="button">55      <MockChild />56    </ScrollIntoViewIfNeeded>,57  );58  expect(wrapper.find('button').length).toBe(1);59});60test('Expect custom options to be passed to `scroll-into-view-if-needed`', () => {61  shallow(62    <ScrollIntoViewIfNeeded options={{ block: 'center' }}>63      <MockChild />64    </ScrollIntoViewIfNeeded>,65  );66  expect(mockScroll).toHaveBeenLastCalledWith(null, { block: 'center' });...

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  await page.click('text=Images');7  await page.click('text=Videos');8  await page.click('text=News');9  await page.click('text=Shopping');10  await page.click('text=Maps');11  await page.click('text=Books');12  await page.click('text=Flights');13  await page.click('text=Finance');14  await page.click('text=Search tools');15  await page.click('text=More');16  await page.click('text=Settings');17  await page.click('text=Sign in');18  await page.click('text=About');19  await page.click('text=Privacy');20  await page.click('text=Terms');21  await page.click('text=Settings');22  await page.click('text=Advertising');23  await page.click('text=Business');24  await page.click('text=How Search works');25  await page.click('text=Privacy');26  await page.click('text=Terms');27  await page.click('text=Settings');28  await page.click('text=Advertising');29  await page.click('text=Business');30  await page.click('text=How Search works');31  await page.click('text=Privacy');32  await page.click('text=Terms');33  await page.click('text=Settings');34  await page.click('text=Advertising');35  await page.click('text=Business');36  await page.click('text=How Search works');37  await page.click('text=Privacy');38  await page.click('text=Terms');39  await page.click('text=Settings');40  await page.click('text=Advertising');41  await page.click('text=Business');42  await page.click('text=How Search works');43  await page.click('text=Privacy');44  await page.click('text=Terms');45  await page.click('text=Settings');46  await page.click('text=Advertising');47  await page.click('text=Business');48  await page.click('text=How Search works');49  await page.click('text=Privacy');50  await page.click('text=Terms');51  await page.click('text=Settings');52  await page.click('text=Advertising');53  await page.click('text=Business');

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  await page.click('text=scrollIntoViewIfNeeded');7  await page.waitForSelector('text=scrollIntoViewIfNeeded');8  await page.$eval('text=scrollIntoViewIfNeeded', element => element.scrollIntoViewIfNeeded());9  await page.screenshot({ path: `test.png` });10  await browser.close();11})();12{13  "scripts": {14  },15  "dependencies": {16  }17}18{19  "dependencies": {20    "playwright": {21      "requires": {

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch({ headless: false });4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.fill('input[title="Search"]', 'playwright');7  await page.press('input[title="Search"]', 'Enter');8  await page.waitForNavigation();9  await page.click('text=Playwright');10  await page.waitForNavigation();11  await page.click('text=Docs');12  await page.waitForNavigation();13  await page.click('text=API');14  await page.waitForNavigation();15  await page.click('text=class: Browser');16  await page.waitForNavigation();17  await page.click('text=BrowserContext');18  await page.waitForNavigation();19  await page.click('text=class: BrowserContext');20  await page.waitForNavigation();21  await page.click('text=BrowserContextOptions');22  await page.waitForNavigation();23  await page.click('text=class: BrowserContextOptions');24  await page.waitForNavigation();25  await page.click('text=BrowserContextOptions');26  await page.waitForNavigation();27  await page.click('text=class: BrowserContextOptions');28  await page.waitForNavigation();29  await page.click('text=BrowserType');30  await page.waitForNavigation();31  await page.click('text=class: BrowserType');32  await page.waitForNavigation();33  await page.click('text=BrowserTypeConnectOptions');34  await page.waitForNavigation();35  await page.click('text=class: BrowserTypeConnectOptions');36  await page.waitForNavigation();37  await page.click('text=BrowserTypeLaunchOptions');38  await page.waitForNavigation();39  await page.click('text=class: BrowserTypeLaunchOptions');40  await page.waitForNavigation();41  await page.click('text=BrowserTypeLaunchPersistentContextOptions');42  await page.waitForNavigation();43  await page.click('text=class: BrowserTypeLaunchPersistentContextOptions');44  await page.waitForNavigation();45  await page.click('text=BrowserTypeLaunchServerOptions');46  await page.waitForNavigation();47  await page.click('text=class: BrowserTypeLaunchServerOptions');48  await page.waitForNavigation();49  await page.click('text=BrowserTypeLaunchPersistentContextOptions');50  await page.waitForNavigation();51  await page.click('text=class: BrowserTypeLaunchPersistentContextOptions');52  await page.waitForNavigation();

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch({ headless: false });4  const context = await browser.newContext();5  const page = await context.newPage();6  const element = await page.$('h1');7  await element.scrollIntoViewIfNeeded();8  await browser.close();9})();10const { chromium } = require('playwright');11(async () => {12  const browser = await chromium.launch({ headless: false });13  const context = await browser.newContext();14  const page = await context.newPage();15  const element = await page.$('h1');16  await element.scrollIntoViewIfNeeded();17  await browser.close();18})();19const { chromium } = require('playwright');20(async () => {21  const browser = await chromium.launch({ headless: false });22  const context = await browser.newContext();23  const page = await context.newPage();24  const element = await page.$('h1');25  await element.scrollIntoViewIfNeeded();26  await browser.close();27})();28const { chromium } = require('playwright');29(async () => {30  const browser = await chromium.launch({ headless: false });31  const context = await browser.newContext();32  const page = await context.newPage();33  const element = await page.$('h1');34  await element.scrollIntoViewIfNeeded();35  await browser.close();36})();37const { chromium } = require('playwright');38(async () => {39  const browser = await chromium.launch({ headless: false });40  const context = await browser.newContext();41  const page = await context.newPage();42  const element = await page.$('h1');

Using AI Code Generation

1const { chromium, webkit, firefox } = require('playwright');2(async () => {3  const browser = await chromium.launch({ headless: false });4  const page = await browser.newPage();5  await page.fill('input[name="q"]', 'Playwright');6  await page.click('input[value="Google Search"]');7  await page.waitForSelector('text=Playwright - Google Search');8  await page.click('text=Playwright - Google Search');9  await page.waitForSelector('text=Playwright is a Node library to automate');10  await page.click('text=Playwright is a Node library to automate');11  await page.waitForSelector('text=Playwright is a Node library to automate');12  await page.click('text=Playwright is a Node library to automate');13  await page.waitForSelector('text=Playwright is a Node library to automate');14  await page.click('text=Playwright is a Node library to automate');15  await page.waitForSelector('text=Playwright is a Node library to automate');16  await page.click('text=Playwright is a Node library to automate');17  await page.waitForSelector('text=Playwright is a Node library to automate');18  await page.click('text=Playwright is a Node library to automate');19  await page.waitForSelector('text=Playwright is a Node library to automate');20  await page.click('text=Playwright is a Node library to automate');21  await page.waitForSelector('text=Playwright is a Node library to automate');22  await page.click('text=Playwright is a Node library to automate');23  await page.waitForSelector('text=Playwright is a Node library to automate');24  await page.click('text=Playwright is a Node library to automate');25  await page.waitForSelector('text=Playwright is a Node library to automate');26  await page.click('text=Playwright is a Node library to automate');27  await page.waitForSelector('text=Playwright is a Node library to automate');28  await page.click('text=Playwright is a Node library to automate');29  await page.waitForSelector('text=Playwright is a Node library to automate');30  await page.click('text=Playwright is a Node library to automate');31  await page.waitForSelector('text=Playwright is a Node library to automate');32  await page.click('text=Playwright is a Node

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  await page.click('text=Google Stadia is a game streaming service that works over the internet');6  await page.waitForSelector('text=Google Stadia is a game streaming service that works over the internet');7  await page.$eval('text=Google Stadia is a game streaming service that works over the internet', (element) => element.scrollIntoViewIfNeeded());8  await page.screenshot({ path: `screenshot.png` });9  await browser.close();10})();

Using AI Code Generation

1await page.evaluate((selector) => {2  document.querySelector(selector).scrollIntoViewIfNeeded();3}, selector);4await page.evaluate((selector) => {5  document.querySelector(selector).scrollIntoView();6}, selector);7await page.evaluate((selector) => {8  document.querySelector(selector).scrollIntoView({block: "center"});9}, selector);10await page.evaluate((selector) => {11  document.querySelector(selector).scrollIntoView({block: "end"});12}, selector);13await page.evaluate((selector) => {14  document.querySelector(selector).scrollIntoView({block: "start"});15}, selector);16await page.evaluate((selector) => {17  document.querySelector(selector).scrollIntoView({behavior: "auto"});18}, selector);19await page.evaluate((selector) => {20  document.querySelector(selector).scrollIntoView({behavior: "smooth"});21}, selector);22await page.evaluate((selector) => {23  document.querySelector(selector).scrollIntoView({inline: "center"});24}, selector);25await page.evaluate((selector) => {26  document.querySelector(selector).scrollIntoView({inline: "end"});27}, selector);28await page.evaluate((selector) => {29  document.querySelector(selector).scrollIntoView({inline: "start"});30}, selector);31await page.evaluate((selector) => {32  document.querySelector(selector).scrollIntoView({block: "center", behavior: "auto", inline

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

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

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

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

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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