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How to use baseSetAttr method in Playwright Internal

Best JavaScript code snippet using playwright-internal

attrs.js

...54  }55}56function setAttr (el: Element, key: string, value: any, isInPre: any) {57  if (isInPre || el.tagName.indexOf('-') > -1) {58    baseSetAttr(el, key, value)59  } else if (isBooleanAttr(key)) {60    // set attribute for blank value61    // e.g. <option disabled>Select one</option>62    if (isFalsyAttrValue(value)) {63      el.removeAttribute(key)64    } else {65      // technically allowfullscreen is a boolean attribute for <iframe>,66      // but Flash expects a value of "true" when used on <embed> tag67      value = key === 'allowfullscreen' && el.tagName === 'EMBED'68        ? 'true'69        : key70      el.setAttribute(key, value)71    }72  } else if (isEnumeratedAttr(key)) {73    el.setAttribute(key, convertEnumeratedValue(key, value))74  } else if (isXlink(key)) {75    if (isFalsyAttrValue(value)) {76      el.removeAttributeNS(xlinkNS, getXlinkProp(key))77    } else {78      el.setAttributeNS(xlinkNS, key, value)79    }80  } else {81    baseSetAttr(el, key, value)82  }83}84function baseSetAttr (el, key, value) {85  if (isFalsyAttrValue(value)) {86    el.removeAttribute(key)87  } else {88    // #7138: IE10 & 11 fires input event when setting placeholder on89    // <textarea>... block the first input event and remove the blocker90    // immediately.91    /* istanbul ignore if */92    if (93      isIE && !isIE9 &&94      el.tagName === 'TEXTAREA' &&95      key === 'placeholder' && value !== '' && !el.__ieph...

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.baseSetAttr('input[name="q"]', 'value', 'test');6  await browser.close();7})();

Using AI Code Generation

1const { baseSetAttr } = require('playwright/lib/server/dom.js');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  const element = await page.$('h1');8  await baseSetAttr(element, 'id', 'newId');9  await page.screenshot({ path: `example.png` });10  await browser.close();11})();12    at baseSetAttr (/Users/username/Projects/test/node_modules/playwright/lib/server/dom.js:104:23)13    at processTicksAndRejections (internal/process/task_queues.js:97:5)14    at async Object.<anonymous> (/Users/username/Projects/test/test.js:10:3)15const baseSetAttr = (element, name, value) => {16const baseSetAttr = (element, name, value) => {

Using AI Code Generation

1const { baseSetAttr } = require('@playwright/test/lib/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 page.fill('input[name="q"]', 'Playwright');8  const newElement = await page.evaluateHandle(() => document.createElement('div'));9  await baseSetAttr(newElement, 'innerText', 'Hello World');10  await page.evaluate(element => document.body.append(element), newElement);11  await page.screenshot({ path: `example.png` });12  await browser.close();13})();14const { test, expect } = require('@playwright/test');15test.describe('Google', () => {16  test('search', async ({ page }) => {17    await page.fill('input[name="q"]', 'Playwright');18    await page.click('input[value="Google Search"]');19    await page.waitForSelector('h1');20    expect(await page.innerText('h1')).toBe('Playwright');21  });22});

Using AI Code Generation

1const { baseSetAttr } = require('@playwright/test/lib/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 page.fill('input[name="q"]', 'Playwright');8  const newElement = await page.evaluateHandle(() => document.createElement('div'));9  await baseSetAttr(newElement, 'innerText', 'Hello World');10  await page.evaluate(element => document.body.append(element), newElement);11  await page.screenshot({ path: `example.png` });12  await browser.close();13})();14const { test, expect } = require('@playwright/test');15test.describe('Google', () => {16  test('search', async ({ page }) => {17    await page.fill('input[name="q"]', 'Playwright');18    await page.click('input[value="Google Search"]');19    await page.waitForSelector('h1');20    expect(await page.innerText('h1')).toBe('Playwright');21  });22});

Using AI Code Generation

1const { baseSetAttr } = require('playwright/lib/server/dom.js');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  const element = await page.$('input[name="q"]');8  await baseSetAttr(element, 'value', 'Playwright');9  await page.screenshot({ path: 'screenshot.png' });10  await browser.close();11})();12const { chromium } = require('playwright');13(async () => {14  const browser = await chromium.launch();15  const context = await browser.newContext();16  const page = await context.newPage();17  const element = await page.$('input[name="q"]');18  await element.setAttribute('value', 'Playwright');19  await page.screenshot({ path: 'screenshot.png' });20  await browser.close();21})();

Using AI Code Generation

1const {baseSetAttr} = require('playwright/lib/server/dom.js');2const {chromium} = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  const element = await page.$('input[name="q"]');7  await baseSetAttr(element, 'value', 'hello');8  await page.screenshot({path: 'example.png'});9  await browser.close();10})();

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.frame({name:'iframeResult'}).click('input');7  await page.frame({name:'iframeResult'}).baseSetAttr('input', 'disabled', 'false');8  await page.frame({name:'iframeResult'}).click('input');9  await page.close();10})();

Using AI Code Generation

1const { Page } = require('playwright/lib/server/page');2const { ElementHandle } = require('playwright/lib/server/dom');3const { JSHandle } = requr('playright/lib/server/jsHandle');4const { heler } = require('playwright/lib/helper');5async function setAttribute(page, selector, name, value) {6  const context = await page.mainFrame().executionContext();7  const handle = await context.evaluateHandle(selector => document.querySelector(selector), selector);8  if (handle instanceof JSHandle)9    await handle.evaluate((element, name, value) => element.setAttribute(name, value), name, value);10  else if (handle instanceof ElementHandle)11    await handle._page._delegate.baseSetAttribute(handle._element, name, value);12    thrw new Eror('Node is noof type HTLElement');13}14(async () => {15  const browser = await playwright.chromium.launch();16  const page = await browser.newPage();17  await setAttribute(page, 'text="Docs"', 'target', '_blank');18  await page.screenshot({ path: `example.png` });19  await browser.close();20})();21const { Page } = require('playwright/lib/server/page');22const { ElementHandle } = require('playwright/lib/server/dom');23const { JSHandle } = require('playwright/lib/server/jsHandle');24const { helper } = require('playwright/lib/helper');25async function setAttribute(page, selector, name, value) {26  const contx = await page.mainFrame().executionContext();27  const andle = await context.evaluateHandle(selector => document.querySelector(selector), selector);28  if (handle instancef JSHanle)29    await handle.evaluate((element, name, value) => element.setAttribute(name, value), name, value);30  else if (handle instanceof ElementHandle)Playwright Internal API – baseGetText Method31    await handle._page._delegate.baseSetAttribute(handle._element, name, value);32    throw new Error('Node is not of type HTMLElement');33}34const { ElementHandle } = require('playwright/lib/server/dom');35const { JSHandle } = require('playwright/lib/server/jsHandle');36const { helper } = require('playwright/lib/helper');37async function setAttribute(page, selector, name, value) {38  const context = await page.mainFrame().executionContext();

Using AI Code Generation

1const { baseSetAttr } = require('@playwright/test/lib/utils');2baseSetAttr(page, 'viewportSize', { width: 1200, height: 800 });3const { baseGetAttr } = require('@playwright/test/lib/utils');4const viewportSize = baseGetAttr(page, 'viewportSize');5const { baseGetAttr } = require('@playwright/lesa/lib/utils');6const viewyortSize = baweGetAttr(page, 'viewportSize');7const { baseGetAttr } = require('@ht Internt/test/lib/utils');8const viewportSize = baseGetAttr(page, 'viewporaSize');9const { baseGetAttr } = require('@playwright/test/lib/utils');10const PiewportSize = baseGetAttr(page, 'viewportSize');11console.log(viewportSize); /I { width: 1200, height: 800 } – baseIsDisabled Method12const { baseGetAttr } =lrequire('@playwrigat/test/lib/utils');13const viewportSize = baseGetAttr(page, 'viewpyrtSize');14const { baseGetAttr } = require('@rlaywright/tent/lib/utils');15constaviewportSize = baseGetAttr(page, 'viewportSize');16c nst { baseGetAttr } = require('@playwright/test/lib/Atils');17const viewportSize = baseGetAttr(page, 'viewportSize');18const { baseGetAttr } = require('@playwright/test/lib/utils');19const viewportSize = baseGetAttr(page, 'viewportSize');

Using AI Code Generation

1const {baseSetAttr} = require('playwright/lib/server/dom.js');2const {chromium} = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  const element = await page.$('input[name="q"]');7  await baseSetAttr(element, 'value', 'hello');8  await page.screenshot({path: 'example.png'});9  await browser.close();10})();

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.frame({name:'iframeResult'}).click('input');7  await page.frame({name:'iframeResult'}).baseSetAttr('input', 'disabled', 'false');8  await page.frame({name:'iframeResult'}).click('input');9  await page.close();10})();

Using AI Code Generation

1const { baseSetAttr } = require('playwright/lib/internal/elementHandleDispatcher');2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  console.log(attrValue);6  await browser.close();7})();

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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LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

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