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How to use genScopedSlots method in Playwright Internal

Best JavaScript code snippet using playwright-internal

index.js

...177    data += `slot:${el.slotTarget},`178  }179  // scoped slots180  if (el.scopedSlots) {181    data += `${genScopedSlots(el.scopedSlots)},`182  }183  // inline-template184  if (el.inlineTemplate) {185    const inlineTemplate = genInlineTemplate(el)186    if (inlineTemplate) {187      data += `${inlineTemplate},`188    }189  }190  data = data.replace(/,$/, '') + '}'191  // v-bind data wrap192  if (el.wrapData) {193    data = el.wrapData(data)194  }195  return data...

render-slot.js

Source: render-slot.js

1/* @flow */2import { extend, warn, isObject } from 'core/util/index'3/**4 * Runtime helper for rendering <slot>5 *6 * åç»ä»¶ _t è°ç¨è¿ä¸ªæ¹æ³ï¼å°±å¯ä»¥å°ç¶ç»ä»¶éé¢å®ä¹ç slot ææ§½æ¸²æå°åç»ä»¶ä¸7 */8export function renderSlot (9  name: string,10  fallback: ?Array<VNode>, // ææ§½åèç¹11  props: ?Object,12  bindObject: ?Object13): ?Array<VNode> {14  const scopedSlotFn = this.$scopedSlots[name] // å°ææ§½èç¹ä»¥ key çæ¹å¼ä¿åå¨ vm.$scopedSlots ä¸,è¿éå¯ä»¥æ ¹æ® key æ¿å°ææ§½èç¹15  if (scopedSlotFn) { // scoped slot16    props = props || {}17    if (bindObject) {18      if (process.env.NODE_ENV !== 'production' && !isObject(bindObject)) {19        warn(20          'slot v-bind without argument expects an Object',21          this22        )23      }24      // å°ç¸å³æ°æ®å¯¹è±¡ï¼bindObjectï¼ï¼å¹¶åå¹¶å° props ä¸25      props = extend(extend({}, bindObject), props)26    }27    // ä½ä¸ºåæ°ä¼ å¥å°æ¸²æææ§½å½æ°ä¸ï¼è¿éæ¯è¾å·§å¦ï¼å¨æ¨¡æ¿ç¼è¯ä¸å®ä¹ç fnï¼æºç ä½ç½® src/compiler/codegen/index.js genScopedSlots28    return scopedSlotFn(props) || fallback29  } else {30    const slotNodes = this.$slots[name]31    // warn duplicate slot usage32    if (slotNodes && process.env.NODE_ENV !== 'production') {33      slotNodes._rendered && warn(34        `Duplicate presence of slot "${name}" found in the same render tree ` +35        `- this will likely cause render errors.`,36        this37      )38      slotNodes._rendered = true39    }40    return slotNodes || fallback41  }...

8393.js

Source: 8393.js

...37  if (el.slotTarget) {38    data += "slot:" + el.slotTarget + ",";39  }40  if (el.scopedSlots) {41    data += genScopedSlots(el.scopedSlots, state) + ",";42  }43  if (el.model) {44    data +=45      "model:{value:" +46      el.model.value +47      ",callback:" +48      el.model.callback +49      ",expression:" +50      el.model.expression +51      "},";52  }53  if (el.inlineTemplate) {54    var inlineTemplate = genInlineTemplate(el, state);55    if (inlineTemplate) {...

11852.js

Source: 11852.js

...37  if (el.slotTarget) {38    data += "slot:" + el.slotTarget + ",";39  }40  if (el.scopedSlots) {41    data += genScopedSlots(el.scopedSlots, state) + ",";42  }43  if (el.model) {44    data +=45      "model:{value:" +46      el.model.value +47      ",callback:" +48      el.model.callback +49      ",expression:" +50      el.model.expression +51      "},";52  }53  if (el.inlineTemplate) {54    var inlineTemplate = genInlineTemplate(el, state);55    if (inlineTemplate) {...

12072.js

Source: 12072.js

...37  if (el.slotTarget) {38    data += "slot:" + el.slotTarget + ",";39  }40  if (el.scopedSlots) {41    data += genScopedSlots(el.scopedSlots, state) + ",";42  }43  if (el.model) {44    data +=45      "model:{value:" +46      el.model.value +47      ",callback:" +48      el.model.callback +49      ",expression:" +50      el.model.expression +51      "},";52  }53  if (el.inlineTemplate) {54    var inlineTemplate = genInlineTemplate(el, state);55    if (inlineTemplate) {...

11009.js

Source: 11009.js

...37  if (el.slotTarget) {38    data += "slot:" + el.slotTarget + ",";39  }40  if (el.scopedSlots) {41    data += genScopedSlots(el.scopedSlots, state) + ",";42  }43  if (el.model) {44    data +=45      "model:{value:" +46      el.model.value +47      ",callback:" +48      el.model.callback +49      ",expression:" +50      el.model.expression +51      "},";52  }53  if (el.inlineTemplate) {54    var inlineTemplate = genInlineTemplate(el, state);55    if (inlineTemplate) {...

11415.js

Source: 11415.js

...37  if (el.slotTarget) {38    data += "slot:" + el.slotTarget + ",";39  }40  if (el.scopedSlots) {41    data += genScopedSlots(el.scopedSlots, state) + ",";42  }43  if (el.model) {44    data +=45      "model:{value:" +46      el.model.value +47      ",callback:" +48      el.model.callback +49      ",expression:" +50      el.model.expression +51      "},";52  }53  if (el.inlineTemplate) {54    var inlineTemplate = genInlineTemplate(el, state);55    if (inlineTemplate) {...

8964.js

Source: 8964.js

...37  if (el.slotTarget) {38    data += "slot:" + el.slotTarget + ",";39  }40  if (el.scopedSlots) {41    data += genScopedSlots(el.scopedSlots, state) + ",";42  }43  if (el.model) {44    data +=45      "model:{value:" +46      el.model.value +47      ",callback:" +48      el.model.callback +49      ",expression:" +50      el.model.expression +51      "},";52  }53  if (el.inlineTemplate) {54    var inlineTemplate = genInlineTemplate(el, state);55    if (inlineTemplate) {...

Using AI Code Generation

1const { chromium } = require('playwright');2const path = require('path');3(async () => {4  const browser = await chromium.launch({ headless: false });5  const context = await browser.newContext();6  const page = await context.newPage();7  const scopedSlot = page._delegate.genScopedSlots({8    render: (h) => h('div', 'Hello World!'),9  });10  const element = await page.$('#app');11  await element.evaluate(scopedSlot.render);12  await browser.close();13})();14      new Vue({15      })16      new Vue({17      })

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.$('div');7  const scopedSlots = await element._internal.genScopedSlots();8  console.log(scopedSlots);9  await browser.close();10})();11{ default: [Function: default] }12{ default: [Function: default] }

Using AI Code Generation

1const { genScopedSlots } = require('playwright/lib/internal/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  const elementHandle = await page.$('input[name="q"]');8  const scopedSlots = genScopedSlots({ id: 'foo' });9  await elementHandle.evaluate((element, { id }) => {10    element.setAttribute('id', id);11  }, scopedSlots);12  await browser.close();13})();

Using AI Code Generation

1const { genScopedSlots } = require('playwright/lib/internal/frames');2const { test } = require('@playwright/test');3test('test', async ({ page }) => {4  const frame = page.mainFrame();5  const slot = genScopedSlots(frame);6  const slot2 = genScopedSlots(frame);7});

Using AI Code Generation

1const { genScopedSlots } = require('playwright/lib/internal/frames');2const { Page } = require('playwright');3const { genScopedSlots } = require('playwright/lib/internal/frames');4const { Page } = require('playwright');5const { genScopedSlots } = require('playwright/lib/internal/frames');6const { Page } = require('playwright');7const { genScopedSlots } = require('playwright/lib/internal/frames');8const { Page } = require('playwright');9const { genScopedSlots } = require('playwright/lib/internal/frames');10const { Page } = require('playwright');11const { genScopedSlots } = require('playwright/lib/internal/frames');12const { Page } = require('playwright');13const { genScopedSlots } = require('playwright/lib/internal/frames');14const { Page } = require('playwright');15const { genScopedSlots } = require('playwright/lib/internal/frames');16const { Page } = require('playwright');17const { genScopedSlots } = require('playwright/lib/internal/frames');18const { Page } = require('playwright');19const { genScopedSlots } = require('playwright/lib/internal/frames');20const { Page } = require('playwright');21const { genScopedSlots } = require('playwright/lib/internal/frames');22const { Page } = require('playwright');23const { genScopedSlots } = require('playwright/lib/internal/frames');24const { Page } = require('playwright');25const { genScopedSlots } = require('playwright/lib/internal/frames');

Using AI Code Generation

1const { genScopedSlots } = require('playwright/lib/client/selectorEngine');2const { ElementHandle } = require('playwright/lib/client/selectorEngine');3const { Selector } = require('playwright/lib/client/selectorEngine');4const { genScopedSlots } = require('playwright/lib/client/selectorEngine');5const { ElementHandle } = require('playwright/lib/client/selectorEngine');6const { Selector } = require('playwright/lib/client/selectorEngine');7const { chromium } = require('playwright');8(async () => {9  const browser = await chromium.launch();10  const context = await browser.newContext();11  const page = await context.newPage();12  const searchInput = await page.$('input[title="Search"]');13  await searchInput.type('Hello World');14  await searchInput.press('Enter');15  await page.waitForSelector('text=Hello World');16  const selector = await Selector.register(genScopedSlots({17    text: (text, options) => {18      return (node, selector) => {19        return node.textContent === text;20      };21    },22  }));23  const helloWorld = await page.waitForSelector(selector('text=Hello World'));24  await helloWorld.click();25  await page.waitForSelector('text=Hello World - Google Search');26  await browser.close();27})();

Using AI Code Generation

1const { genScopedSlots } = require('playwright/lib/internal/test/test');2const { genScopedSlots } = require('playwright/lib/internal/test/test');3const { genScopedSlots } = require('playwright/lib/internal/test/test');4const { genScopedSlots } = require('playwright/lib/internal/test/test');5const { genScopedSlots } = require('playwright/lib/internal/test/test');6const { genScopedSlots } = require('playwright/lib/internal/test/test');7const { genScopedSlots } = require('playwright/lib/internal/test/test');8const { genScopedSlots } = require('playwright/lib/internal/test/test');9const { genScopedSlots } = require('playwright/lib/internal/test/test');10const { genScopedSlots } = require('playwright/lib/internal/test/test');11const { genScopedSlots } = require('playwright/lib/internal/test/test');12const { genScopedSlots } = require('playwright/lib/internal/test/test');13const { genScopedSlots } = require('playwright/lib/internal/test/test');14const { genScopedSlots } = require('playwright/lib/internal/test/test');15const { genScopedSlots } = require('playwright/lib/internal/test

Using AI Code Generation

1const { Page } = require('playwright');2const { genScopedSlots } = require('playwright/lib/internal/locator');3const { Locator } = require('playwright/lib/locator');4Page.prototype.genScopedSlots = function(selector) {5  const scope = this.locator(selector);6  return genScopedSlots(scope);7};8Locator.prototype.genScopedSlots = function(selector) {9  return genScopedSlots(this, selector);10};11ElementHandle.prototype.genScopedSlots = function(selector) {12  return genScopedSlots(this, selector);13};14Frame.prototype.genScopedSlots = function(selector) {15  return genScopedSlots(this, selector);16};17JSHandle.prototype.genScopedSlots = function(selector) {18  return genScopedSlots(this, selector);19};20const { test, expect } = require('@playwright/test');21const { Locator } = require('playwright/lib/locator');22const { ElementHandle } = require('playwright/lib/elementHandle');23const { Frame } = require('playwright/lib/frame');24const { JSHandle } = require('playwright/lib/jsHandle');25test.describe('Scoped Slots', () => {26  test('Locator', async ({ page }) => {27    await page.setContent(`28    `);29    const parent = await page.$('#parent');30    const child = await page.$('#child');31    const scopedSlots = await parent.genScopedSlots();32    expect(scopedSlots).toBeInstanceOf(Locator);33    expect(await scopedSlots.evaluate((els) => els.length)).toBe(1);34    expect(await scopedSlots.evaluate((els) => els[0].innerText)).toBe('child');35    expect(await scopedSlots.evaluate((els) => els[0])).toBe(child);36  });37  test('ElementHandle', async ({ page }) => {38    await page.setContent(`39    `);40    const parent = await page.$('#parent');41    const child = await page.$('#child');42    const scopedSlots = await parent.genScopedSlots();43    expect(scopedSlots).toBe

StackOverFlow community discussions

Questions

Discussion

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

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

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

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

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