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How to use setDevtoolsHook method in Playwright Internal

Best JavaScript code snippet using playwright-internal

...110window.playwrightMount = async component => {111  const app = instance.createApp({112    render: () => render(component)113  });114  instance.setDevtoolsHook(createDevTools(), {});115  app.mount('#root');116  return '#root > *';...

vue.esm.re-export.js

Source: vue.esm.re-export.js

1import { BaseTransition, Comment, Fragment, KeepAlive, Static, Suspense, 2    Teleport, Text, Transition, TransitionGroup, callWithAsyncErrorHandling, 3    callWithErrorHandling, camelize, capitalize, cloneVNode, compile, 4    computed, createApp, createBlock, createCommentVNode, 5    createHydrationRenderer, createRenderer, createSSRApp, createSlots, 6    createStaticVNode, createTextVNode, createVNode, customRef, 7    defineAsyncComponent, defineComponent, defineEmit, defineProps, 8    devtools, getCurrentInstance, getTransitionRawChildren, h, handleError, 9    hydrate, initCustomFormatter, inject, isProxy, isReactive, isReadonly, 10    isRef, isVNode, markRaw, mergeProps, nextTick, onActivated, onBeforeMount, 11    onBeforeUnmount, onBeforeUpdate, onDeactivated, onErrorCaptured, onMounted, 12    onRenderTracked, onRenderTriggered, onUnmounted, onUpdated, openBlock, 13    popScopeId, provide, proxyRefs, pushScopeId, queuePostFlushCb, reactive, 14    readonly, ref, registerRuntimeCompiler, render, renderList, renderSlot, 15    resolveComponent, resolveDirective, resolveDynamicComponent, 16    resolveTransitionHooks, setBlockTracking, setDevtoolsHook, 17    setTransitionHooks, shallowReactive, shallowReadonly, shallowRef, 18    ssrContextKey, ssrUtils, toDisplayString, toHandlerKey, toHandlers, 19    toRaw, toRef, toRefs, transformVNodeArgs, triggerRef, unref, useContext, 20    useCssModule, useCssVars, useSSRContext, useTransitionState, 21    vModelCheckbox, vModelDynamic, vModelRadio, vModelSelect, vModelText, 22    vShow, version, warn, watch, watchEffect, withCtx, withDirectives, 23    withKeys, withModifiers, withScopeId } 24    from "/node_modules/vue/dist/vue.esm-browser.js";25export { BaseTransition, Comment, Fragment, KeepAlive, Static, Suspense, 26    Teleport, Text, Transition, TransitionGroup, callWithAsyncErrorHandling, 27    callWithErrorHandling, camelize, capitalize, cloneVNode, compile, 28    computed, createApp, createBlock, createCommentVNode, 29    createHydrationRenderer, createRenderer, createSSRApp, createSlots, 30    createStaticVNode, createTextVNode, createVNode, customRef, 31    defineAsyncComponent, defineComponent, defineEmit, defineProps, 32    devtools, getCurrentInstance, getTransitionRawChildren, h, handleError, 33    hydrate, initCustomFormatter, inject, isProxy, isReactive, isReadonly, 34    isRef, isVNode, markRaw, mergeProps, nextTick, onActivated, onBeforeMount, 35    onBeforeUnmount, onBeforeUpdate, onDeactivated, onErrorCaptured, onMounted, 36    onRenderTracked, onRenderTriggered, onUnmounted, onUpdated, openBlock, 37    popScopeId, provide, proxyRefs, pushScopeId, queuePostFlushCb, reactive, 38    readonly, ref, registerRuntimeCompiler, render, renderList, renderSlot, 39    resolveComponent, resolveDirective, resolveDynamicComponent, 40    resolveTransitionHooks, setBlockTracking, setDevtoolsHook, 41    setTransitionHooks, shallowReactive, shallowReadonly, shallowRef, 42    ssrContextKey, ssrUtils, toDisplayString, toHandlerKey, toHandlers, 43    toRaw, toRef, toRefs, transformVNodeArgs, triggerRef, unref, useContext, 44    useCssModule, useCssVars, useSSRContext, useTransitionState, 45    vModelCheckbox, vModelDynamic, vModelRadio, vModelSelect, vModelText, 46    vShow, version, warn, watch, watchEffect, withCtx, withDirectives, ...

vue.esm-bundler.js

Source: vue.esm-bundler.js

...5import { compile } from '@vue/compiler-dom';6function initDev() {7    const target = getGlobalThis();8    target.__VUE__ = true;9    setDevtoolsHook(target.__VUE_DEVTOOLS_GLOBAL_HOOK__);10    {11        initCustomFormatter();12    }13}14// This entry is the "full-build" that includes both the runtime15(process.env.NODE_ENV !== 'production') && initDev();16const compileCache = Object.create(null);17function compileToFunction(template, options) {18    if (!isString(template)) {19        if (template.nodeType) {20            template = template.innerHTML;21        }22        else {23            (process.env.NODE_ENV !== 'production') && warn(`invalid template option: `, template);...

vue.runtime.esm-bundler.js

Source: vue.runtime.esm-bundler.js

...3import { getGlobalThis } from '@vue/shared';4function initDev() {5    const target = getGlobalThis();6    target.__VUE__ = true;7    setDevtoolsHook(target.__VUE_DEVTOOLS_GLOBAL_HOOK__);8    {9        initCustomFormatter();10    }11}12// This entry exports the runtime only, and is built as13(process.env.NODE_ENV !== 'production') && initDev();14const compile = () => {15    if ((process.env.NODE_ENV !== 'production')) {16        warn(`Runtime compilation is not supported in this build of Vue.` +17            ( ` Configure your bundler to alias "vue" to "vue/dist/vue.esm-bundler.js".`18                ) /* should not happen */);19    }20};21export { compile };

tests.js

Source: tests.js

1import { createApp, setDevtoolsHook, h } from 'vue'2import register from '@playwright/experimental-ct-vue/register'3import Button from './components/Button.vue'4import DefaultSlot from './components/DefaultSlot.vue'5import NamedSlots from './components/NamedSlots.vue'6register({7  Button,8  DefaultSlot,9  NamedSlots10}, {11  // This is only needed if you are using Vue CLI (webpack).12  // Vite does not need this line.13  createApp,14  setDevtoolsHook,15  h...

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3    const browser = await playwright.chromium.launch({4    });5    const context = await browser.newContext();6    const page = await context.newPage();7    await page.setDevtoolsHook();8    await page.close();9    await browser.close();10})();11const playwright = require('playwright');12(async () => {13    const browser = await playwright.chromium.launch({

Using AI Code Generation

1const { chromium } = require('playwright');2const { setDevtoolsHook } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement');3(async () => {4  const browser = await chromium.launch({ headless: false, slowMo: 50 });5  const context = await browser.newContext();6  setDevtoolsHook(context, (msg) => console.log(msg));7  const page = await context.newPage();8  await page.click('text=Get started');9  await browser.close();10})();11const { test, expect } = require('@playwright/test');12test('test', async ({ page }) => {13  await page.click('text=Get started');14});15const { setDevtoolsHook } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement');16module.exports = {17  use: {18    devtoolsHook: (msg) => console.log(msg),19  },20};21### `setDevtoolsHook(context, callback)`22[MIT](./LICENSE)

Using AI Code Generation

1const { setDevtoolsHook } = require('playwright/lib/server/supplements/recorder/recorderSupplement');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  setDevtoolsHook(browser);6  const page = await browser.newPage();7  await page.click('text="I agree"');8  await page.click('text="Google Search"');9  await page.click('text="Playwright"');10  await page.close();11  await browser.close();12})();13[Apache 2.0](LICENSE)

Using AI Code Generation

1const { setDevtoolsHook } = require('playwright/lib/internal/inspector');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  setDevtoolsHook(page, (message) => {7    console.log(message);8  });9  await browser.close();10})();

Using AI Code Generation

1const { setDevtoolsHook } = require('playwright/lib/server/supplements/recorder/recorderApp');2const { setDevtoolsHook } = require('playwright/lib/server/supplements/recorder/recorderApp');3const { setDevtoolsHook } = require('playwright/lib/server/supplements/recorder/recorderApp');4const { setDevtoolsHook } = require('playwright/lib/server/supplements/recorder/recorderApp');5const { setDevtoolsHook } = require('playwright/lib/server/supplements/recorder/recorderApp');6const { setDevtoolsHook } = require('playwright/lib/server/supplements/recorder/recorderApp');7const { setDevtoolsHook } = require('playwright/lib/server/supplements/recorder/recorderApp');8const { setDevtoolsHook } = require('playwright/lib/server/supplements/recorder/recorderApp');9const { setDevtoolsHook } = require('playwright/lib/server/supplements/recorder/recorderApp');10const { setDevtoolsHook } = require('playwright/lib/server/supplements/recorder/recorderApp');11const { setDevtoolsHook } = require('playwright/lib/server/supplements/recorder/recorderApp');12const { setDevtoolsHook } = require('playwright/lib/server/supplements/recorder/recorderApp');13const { setDevtoolsHook } = require('playwright/lib/server/supplements/recorder/recorderApp');14const { set

Using AI Code Generation

1const { setDevtoolsHook } = require('playwright/lib/server/inspector');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  await setDevtoolsHook(page, (message) => {7    console.log(message);8  });9  await browser.close();10})();

Using AI Code Generation

1const { setDevtoolsHook } = require('playwright/lib/server/inspector');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch({ headless: false });5  const page = await browser.newPage();6  setDevtoolsHook(page, (message) => {7    console.log(message);8  });9})();10### `setDevtoolsHook(page, callback)`11### `setDevtoolsHook(page, null)`12Apache-2.0 © [Microsoft](

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch({ headless: false });4  const page = await browser.newPage();5  await browser.close();6})();

Using AI Code Generation

1const playwright = require('playwright');2const { setDevtoolsHook } = playwright._impl._electron;3setDevtoolsHook((message) => console.log(message));4const browser = await playwright.chromium.launch();5const context = await browser.newContext();6const page = await context.newPage();7await browser.close();8### setDevtoolsHook(hook)9const playwright = require('playwright');10const { setDevtoolsHook } = playwright._impl._electron;11setDevtoolsHook((message) => console.log(message));12const browser = await playwright.chromium.launch();13const context = await browser.newContext();14const page = await context.newPage();15await browser.close();

Using AI Code Generation

1const playwright = require('playwright');2const { setDevtoolsHook } = require('playwright/lib/server/browserType');3setDevtoolsHook(playwright._browserType);4playwright._browserType._devtools = true;5const browser = await playwright.chromium.launch();6const context = await browser.newContext();7const page = await context.newPage();8await browser.close();9[MIT](

StackOverFlow community discussions

Questions

Discussion

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

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

firefox browser does not start in playwright

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

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

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

Blogs

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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.

Chapters:

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