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How to use genScopedSlot method in Playwright Internal

Best JavaScript code snippet using playwright-internal

index.js

...463  }464}465/*466  ä½ç¨:467        1ãå¯¹æææç³ååç´ è¿è¡å¤çï¼è¾åºæ¯å¦:`scopedSlots:_u([genScopedSlot('header',ASTElement, state),genScopedSlot('default',ASTElement, state)])`468*/469function genScopedSlots (470  slots: { [key: string]: ASTElement },471  state: CodegenState472): string {473  /*474    scopedSlots: {475      header: ASTElement,476      "default": ASTElement477    }478  */479  return `scopedSlots:_u([${480    Object.keys(slots).map(key => {481      return genScopedSlot(key, slots[key], state)482    }).join(',')483  }])`484}485/*486   ä½ç¨:487         1ãå¯¹åä¸ªæç³ååç´ è¿è¡å¤ç488         2ãåå¨forå±æ§,è¿å _l((å¾ªç¯æºæ°æ®),function(åä¸ªå¾ªç¯æ°æ®,ä¸æ ||key,index || '') { return ç¬¬ä¸æ¥çè¾åºå¼})489         3ãä¸åå¨forå±æ§,è¿åæ¯å¦:490            {491              key: 'header',492              fn: `function(String(slotScopeå±æ§å¼)){493                  ç¬¬ä¸ç§(æ ç¾ä¸ä¸ºtemplate): return genElement(el, state)494                  ç¬¬äºç§(æ ç¾ä¸ºtemplate):495                      1ãåå¨ifå±æ§: return `${el.if}?${genChildren(el, state) || 'undefined'}:undefined`496                      2ãä¸åå¨ifå±æ§ return genChildren(el, state) || 'undefined'497              }`498            }499*/500function genScopedSlot (501  key: string,502  el: ASTElement,503  state: CodegenState504): string {505  //åå¨forå±æ§ && forProcessedå±æ§ä¸åå¨506  if (el.for && !el.forProcessed) {507    return genForScopedSlot(key, el, state)508  }509  // ä¸åå¨forå±æ§ || forProcessedä¸ºtrue510  const fn = `function(${String(el.slotScope)}){` +511    `return ${el.tag === 'template' // æ ç¾ä¸ºtemplate512      ? el.if // åå¨ifå±æ§çtemplate513        ? `${el.if}?${genChildren(el, state) || 'undefined'}:undefined`514        : genChildren(el, state) || 'undefined'515      : genElement(el, state)516    }}`517  return `{key:${key},fn:${fn}}`518}519/*520  ä½ç¨:521      å¯¹forå¾ªç¯è¿è¡å¤ç,è¾åºæ¯å¦: _l((lists),function(item,index,'') { return genScopedSlot(key, el, state)})522*/523function genForScopedSlot (524  key: string,525  el: any,526  state: CodegenState527): string {528  const exp = el.for //ç¼åå¾ªç¯æºæ°æ®åæ®µ529  const alias = el.alias // ç¼åvalueåæ®µ530  const iterator1 = el.iterator1 ? `,${el.iterator1}` : '' // åå¨key || indexåæ®µ531  const iterator2 = el.iterator2 ? `,${el.iterator2}` : ''// åå¨indexåæ®µ532  // è®¾ç½®forProcessedä¸ºtrue,è¡¨ç¤ºå·²å¯¹v-foræä»¤å¤çè¿äº533  el.forProcessed = true // avoid recursion534  return `_l((${exp}),` +535    `function(${alias}${iterator1}${iterator2}){` +536      `return ${genScopedSlot(key, el, state)}` +537    '})'538}539/*540   ä½ç¨:541         1ãä¸åå¨åèç¹ï¼è¿åundefined542         2ãåªåå¨ä¸ä¸ªåèç¹ && è¯¥èç¹ä¸ä¸ºtemplateåslot,ä¼ äºaltGenElementåæ°è¿åaltGenElement(el,state);543            æ²¡ä¼ è¿ågenElement(el, state)544         3ãä¸æ»¡è¶³ä»¥ä¸æ¡ä»¶,ä¼ äºaltGenNodeåæ°,å¯¹ååç´ ç»åè¿è¡altGenNode(c, state)å¤ç,å¹¶å°è¿åç»æç¨ï¼æ¼æ¥æ¾å¥545            æ°ç»ä¸;æ²¡ä¼ å¯¹ååç´ ç»åè¿è¡genNode(c, state)å¤ç.546            æåè¾åº`[genNode(c, state),genNode(c, state)]` || `[genNode(c, state),genNode(c, state)], 2 || 3`547*/548export function genChildren (549  el: ASTElement,550  state: CodegenState,...

11013.js

Source: 11013.js

2  return (3    "scopedSlots:_u([" +4    Object.keys(slots)5      .map(function(key) {6        return genScopedSlot(key, slots[key], state);7      })8      .join(",") +9    "])"10  );...

11420.js

Source: 11420.js

1{2 return genScopedSlot(key, slots[key], state);...

11857.js

Source: 11857.js

1{2 return genScopedSlot(key, slots[key], state);...

8969.js

Source: 8969.js

1{2 return genScopedSlot(key, slots[key], state);...

12077.js

Source: 12077.js

1{2 return genScopedSlot(key, slots[key], state);...

11014.js

Source: 11014.js

1{2 return genScopedSlot(key, slots[key], state);...

8398.js

Source: 8398.js

1{2 return genScopedSlot(key, slots[key], state);...

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    const element = await page.$('input[name="q"]');7    const slot = await element._internal.genScopedSlot();8    await page.evaluate((slot) => {9        document.querySelector('input[name="q"]')._internal.setScopedSlot(slot);10    }, slot);11    await page.screenshot({ path: 'example.png' });12    await browser.close();13})();14Error: Protocol error (Runtime.callFunctionOn): Cannot find context with specified id15const { chromium } = require('playwright');16(async () => {17    const browser = await chromium.launch();18    const context = await browser.newContext();19    const page = await context.newPage();20    const element = await page.$('input[name="q"]');21    const slot = await element._internal.genScopedSlot();22    await page.evaluate((slot) => {23        document.querySelector('input[name="q"]')._internal.setScopedSlot(slot);24    }, slot);25    await page.screenshot({ path: 'example.png' });26    await browser.close();27})();28const { chromium } = require('playwright');29(async () => {30    const browser = await chromium.launch();31    const context = await browser.newContext();32    const page = await context.newPage();33    const element = await page.$('input[name="q"]');34    await page.evaluate((element) => {35        element._internal.setScopedSlot(element._internal.genScopedSlot());36    }, element);37    await page.screenshot({ path: 'example.png' });38    await browser.close();39})();

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  const slot = await page._delegate.genScopedSlot();6  console.log(slot);7  await browser.close();8})();9{ slot: '1', time: 1595343601 }10const { chromium } = require('playwright');11(async () => {12  const browser = await chromium.launch();13  const page = await browser.newPage();14  const slot = await page._delegate.genScopedSlot();15  const page2 = await browser.newPage({ slot: slot.slot });16  await browser.close();17})();18{ slot: '1', time: 1595343601 }

Using AI Code Generation

1const { genScopedSlot } = require('@playwright/test/lib/server/supplements/utils/scopedSlots');2const { test } = require('@playwright/test');3test('test', async ({ page }) => {4  const slot = genScopedSlot('test');5  await page.waitForSelector('[data-testid="test"]');6});7const { test, expect } = require('@playwright/test');8const { createServer } = require('http');9test.describe('test', () => {10  test.beforeAll(async ({}, testInfo) => {11    const server = createServer((req, res) => {12      const data = JSON.stringify({ dataTestId: testInfo.title });13      res.setHeader('Content-Type', 'application/json');14      res.end(data);15    });16    server.listen(3000);17    testInfo.attachments.push({18    });19  });20  test('test', async ({ page }) => {21    const data = await page.evaluate(() => JSON.parse(document.body.innerText));22    expect(data.dataTestId).toBe('test');23  });24});

Using AI Code Generation

1const { genScopedSlot } = require('@playwright/test/lib/runner');2const { test } = require('@playwright/test');3const { expect } = require('@playwright/test');4const { chromium } = require('playwright');5const { firefox } = require('playwright');6const { webkit } = require('playwright');7const { genScopedSlot } = require('@playwright/test/lib/runner');8test.describe('Playwright Test', () => {9  test.use({ storageState: 'storage.json' });10  test('Playwright Test', async ({ page }) => {11    await page.fill('#tsf > div:nth-child(2) > div > div.RNNXgb > div > div.a4bIc > input', 'Playwright');12    await page.keyboard.press('Enter');13    await page.click('text=Playwright');14    await page.click('text=Getting started');15    await page.click('text=Installation');

Using AI Code Generation

1const { genScopedSlot } = require('playwright/lib/internal/utils');2const { test, expect } = require('@playwright/test');3test('test', async ({ page }) => {4  await page.setContent(`<div id="div1">Hello</div>`);5  await page.setContent(`<div id="div2">World</div>`);6  await page.setContent(`<div id="div3">!</div>`);7  const slot = genScopedSlot('div');8  const divs = await page.$$(slot);9  expect(divs.length).toBe(3);10});11import { test, expect } from '@playwright/test';12test('test', async ({ page }) => {13  await page.setContent(`<div id="div1">Hello</div>`);14  await page.setContent(`<div id="div2">World</div>`);15  await page.setContent(`<div id="div3">!</div>`);16  const slot = page._genScopedSlot('div');17  const divs = await page.$$(slot);18  expect(divs.length).toBe(3);19});20const { test, expect } = require('@playwright/test');21test('test', async ({ page }) => {22  await page.setContent(`<div id="div1">Hello</div>`);23  await page.setContent(`<div id="div2">World</div>`);24  await page.setContent(`<div id="div3">!</div>`);25  const slot = page._genScopedSlot('div');26  const divs = await page.$$(slot);27  expect(divs.length).toBe(3);28});

Using AI Code Generation

1const { Playwright } = require('playwright');2const { genScopedSlot } = Playwright.InternalAPI;3const { test } = require('@playwright/test');4test('generate scoped slot', async ({ page }) => {5  const slot = genScopedSlot('div', { class: 'test' }, 'Hello World');6  await page.setContent(slot);7  const text = await page.innerText('div');8  expect(text).toBe('Hello World');9});

Using AI Code Generation

1const { genScopedSlot } = require('playwright-core/lib/server/supplements/utils/scopedSlots');2const { Page } = require('playwright-core/lib/server/page');3const slot = genScopedSlot('slotName', 'slotValue');4const page = new Page();5page.slot('slotName', 'slotValue');6const browserContext = page.context();7browserContext.slot('slotName', 'slotValue');8const browser = browserContext.browser();9browser.slot('slotName', 'slotValue');10const playwright = require('playwright-core');11playwright.slot('slotName', 'slotValue');12const { slot } = require('playwright-core');13slot('slotName', 'slotValue');14const { slot } = require('playwright-core/lib/server/supplements/utils/scopedSlots');15slot('slotName', 'slotValue');16const { slot } = require('playwright-core/lib/server/supplements/utils/scopedSlots');17slot('slotName', 'slotValue');18const { slot } = require('playwright-core/lib/server/supplements/utils/scopedSlots');19slot('slotName', 'slotValue');20const { slot } = require('playwright-core/lib/server/supplements/utils/scopedSlots');21slot('slotName', 'slotValue');22const { slot } = require('playwright-core/lib/server/supplements/utils/scopedSlots');23slot('slotName', 'slotValue');24const { slot } = require('playwright-core/lib/server/supplements/utils/scopedSlots');25slot('slotName', 'slotValue');26const { slot } = require('playwright-core/lib/server/supplements/utils/scopedSlots');27slot('slotName', 'slotValue');28const { slot } = require('playwright-core/lib/server/supplements/utils

Using AI Code Generation

1const { _genScopedSlot } = require('playwright/lib/client/selectorEngine');2const scopedSlot = _genScopedSlot('my-scoped-slot');3await page.setContent(`<my-component>${scopedSlot('Hello World')}</my-component>`);4await page.waitForSelector('my-component >>> my-scoped-slot');5const value = await page.$eval('my-component >>> my-scoped-slot', (e) => e.textContent);6expect(value).toBe('Hello World');

StackOverFlow community discussions

Questions

Discussion

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

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

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

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

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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