KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

How to use remountFiber method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberBeginWork.new.js

Source:ReactFiberBeginWork.new.js

...2818    cloneChildFibers(current, workInProgress);2819    return workInProgress.child;2820  }2821}2822function remountFiber(2823  current: Fiber,2824  oldWorkInProgress: Fiber,2825  newWorkInProgress: Fiber,2826): Fiber | null {2827  if (__DEV__) {2828    const returnFiber = oldWorkInProgress.return;2829    if (returnFiber === null) {2830      throw new Error('Cannot swap the root fiber.');2831    }2832    // Disconnect from the old current.2833    // It will get deleted.2834    current.alternate = null;2835    oldWorkInProgress.alternate = null;2836    // Connect to the new tree.2837    newWorkInProgress.index = oldWorkInProgress.index;2838    newWorkInProgress.sibling = oldWorkInProgress.sibling;2839    newWorkInProgress.return = oldWorkInProgress.return;2840    newWorkInProgress.ref = oldWorkInProgress.ref;2841    // Replace the child/sibling pointers above it.2842    if (oldWorkInProgress === returnFiber.child) {2843      returnFiber.child = newWorkInProgress;2844    } else {2845      let prevSibling = returnFiber.child;2846      if (prevSibling === null) {2847        throw new Error('Expected parent to have a child.');2848      }2849      while (prevSibling.sibling !== oldWorkInProgress) {2850        prevSibling = prevSibling.sibling;2851        if (prevSibling === null) {2852          throw new Error('Expected to find the previous sibling.');2853        }2854      }2855      prevSibling.sibling = newWorkInProgress;2856    }2857    // Delete the old fiber and place the new one.2858    // Since the old fiber is disconnected, we have to schedule it manually.2859    const deletions = returnFiber.deletions;2860    if (deletions === null) {2861      returnFiber.deletions = [current];2862      // TODO (effects) Rename this to better reflect its new usage (e.g. ChildDeletions)2863      returnFiber.flags |= Deletion;2864    } else {2865      deletions.push(current);2866    }2867    newWorkInProgress.flags |= Placement;2868    // Restart work from the new fiber.2869    return newWorkInProgress;2870  } else {2871    throw new Error(2872      'Did not expect this call in production. ' +2873        'This is a bug in React. Please file an issue.',2874    );2875  }2876}2877function beginWork(2878  current: Fiber | null,2879  workInProgress: Fiber,2880  renderLanes: Lanes,2881): Fiber | null {2882  const updateLanes = workInProgress.lanes;2883  if (__DEV__) {2884    if (workInProgress._debugNeedsRemount && current !== null) {2885      // This will restart the begin phase with a new fiber.2886      return remountFiber(2887        current,2888        workInProgress,2889        createFiberFromTypeAndProps(2890          workInProgress.type,2891          workInProgress.key,2892          workInProgress.pendingProps,2893          workInProgress._debugOwner || null,2894          workInProgress.mode,2895          workInProgress.lanes,2896        ),2897      );2898    }2899  }2900  if (current !== null) {...

ReactFiberBeginWork.old.js

Source:ReactFiberBeginWork.old.js

...1693      cloneChildFibers(current, workInProgress);1694      return workInProgress.child;1695    }1696  }1697  function remountFiber(current, oldWorkInProgress, newWorkInProgress) {1698    {1699      var returnFiber = oldWorkInProgress.return;1700      if (returnFiber === null) {1701        throw new Error('Cannot swap the root fiber.');1702      } // Disconnect from the old current.1703      // It will get deleted.1704      current.alternate = null;1705      oldWorkInProgress.alternate = null; // Connect to the new tree.1706      newWorkInProgress.index = oldWorkInProgress.index;1707      newWorkInProgress.sibling = oldWorkInProgress.sibling;1708      newWorkInProgress.return = oldWorkInProgress.return;1709      newWorkInProgress.ref = oldWorkInProgress.ref; // Replace the child/sibling pointers above it.1710      if (oldWorkInProgress === returnFiber.child) {1711        returnFiber.child = newWorkInProgress;1712      } else {1713        var prevSibling = returnFiber.child;1714        if (prevSibling === null) {1715          throw new Error('Expected parent to have a child.');1716        }1717        while (prevSibling.sibling !== oldWorkInProgress) {1718          prevSibling = prevSibling.sibling;1719          if (prevSibling === null) {1720            throw new Error('Expected to find the previous sibling.');1721          }1722        }1723        prevSibling.sibling = newWorkInProgress;1724      } // Delete the old fiber and place the new one.1725      // Since the old fiber is disconnected, we have to schedule it manually.1726      var last = returnFiber.lastEffect;1727      if (last !== null) {1728        last.nextEffect = current;1729        returnFiber.lastEffect = current;1730      } else {1731        returnFiber.firstEffect = returnFiber.lastEffect = current;1732      }1733      current.nextEffect = null;1734      current.flags = Deletion;1735      newWorkInProgress.flags |= Placement; // Restart work from the new fiber.1736      return newWorkInProgress;1737    }1738  }1739  function beginWork(current, workInProgress, renderLanes) {1740    var updateLanes = workInProgress.lanes;1741    {1742      if (workInProgress._debugNeedsRemount && current !== null) {1743        // This will restart the begin phase with a new fiber.1744        return remountFiber(current, workInProgress, createFiberFromTypeAndProps(workInProgress.type, workInProgress.key, workInProgress.pendingProps, workInProgress._debugOwner || null, workInProgress.mode, workInProgress.lanes));1745      }1746    }1747    if (current !== null) {1748      var oldProps = current.memoizedProps;1749      var newProps = workInProgress.pendingProps;1750      if (oldProps !== newProps || hasContextChanged() || ( // Force a re-render if the implementation changed due to hot reload:1751       workInProgress.type !== current.type )) {1752        // If props or context changed, mark the fiber as having performed work.1753        // This may be unset if the props are determined to be equal later (memo).1754        didReceiveUpdate = true;1755      } else if (!includesSomeLane(renderLanes, updateLanes)) {1756        didReceiveUpdate = false; // This fiber does not have any pending work. Bailout without entering1757        // the begin phase. There's still some bookkeeping we that needs to be done1758        // in this optimized path, mostly pushing stuff onto the stack....

ReactFiberBeginWork.js

Source:ReactFiberBeginWork.js

...2007    cloneChildFibers(current, workInProgress);2008    return workInProgress.child;2009  }2010}2011function remountFiber(2012  current: Fiber,2013  oldWorkInProgress: Fiber,2014  newWorkInProgress: Fiber,2015): Fiber | null {2016  if (__DEV__) {2017    const returnFiber = oldWorkInProgress.return;2018    if (returnFiber === null) {2019      throw new Error('Cannot swap the root fiber.');2020    }2021    // Disconnect from the old current.2022    // It will get deleted.2023    current.alternate = null;2024    oldWorkInProgress.alternate = null;2025    // Connect to the new tree.2026    newWorkInProgress.index = oldWorkInProgress.index;2027    newWorkInProgress.sibling = oldWorkInProgress.sibling;2028    newWorkInProgress.return = oldWorkInProgress.return;2029    // Replace the child/sibling pointers above it.2030    if (oldWorkInProgress === returnFiber.child) {2031      returnFiber.child = newWorkInProgress;2032    } else {2033      let prevSibling = returnFiber.child;2034      if (prevSibling === null) {2035        throw new Error('Expected parent to have a child.');2036      }2037      while (prevSibling.sibling !== oldWorkInProgress) {2038        prevSibling = prevSibling.sibling;2039        if (prevSibling === null) {2040          throw new Error('Expected to find the previous sibling.');2041        }2042      }2043      prevSibling.sibling = newWorkInProgress;2044    }2045    // Delete the old fiber and place the new one.2046    // Since the old fiber is disconnected, we have to schedule it manually.2047    const last = returnFiber.lastEffect;2048    if (last !== null) {2049      last.nextEffect = current;2050      returnFiber.lastEffect = current;2051    } else {2052      returnFiber.firstEffect = returnFiber.lastEffect = current;2053    }2054    current.nextEffect = null;2055    current.effectTag = Deletion;2056    newWorkInProgress.effectTag |= Placement;2057    // Restart work from the new fiber.2058    return newWorkInProgress;2059  } else {2060    throw new Error(2061      'Did not expect this call in production. ' +2062        'This is a bug in React. Please file an issue.',2063    );2064  }2065}2066function beginWork(2067  current: Fiber | null,2068  workInProgress: Fiber,2069  renderExpirationTime: ExpirationTime,2070): Fiber | null {2071  const updateExpirationTime = workInProgress.expirationTime;2072  if (__DEV__) {2073    if (workInProgress._debugNeedsRemount && current !== null) {2074      // This will restart the begin phase with a new fiber.2075      return remountFiber(2076        current,2077        workInProgress,2078        createFiberFromTypeAndProps(2079          workInProgress.type,2080          workInProgress.key,2081          workInProgress.pendingProps,2082          workInProgress._debugOwner || null,2083          workInProgress.mode,2084          workInProgress.expirationTime,2085        ),2086      );2087    }2088  }2089  if (current !== null) {...

0__index.js

Source:0__index.js

2    var updateExpirationTime = workInProgress.expirationTime;3    {4        if (workInProgress._debugNeedsRemount && current$$1 !== null) {5            // This will restart the begin phase with a new fiber.6            return remountFiber(current$$1, workInProgress, createFiberFromTypeAndProps(workInProgress.type, workInProgress.key, workInProgress.pendingProps, workInProgress._debugOwner || null, workInProgress.mode, workInProgress.expirationTime));7        }8    }9    if (current$$1 !== null) {10        var oldProps = current$$1.memoizedProps;11        var newProps = workInProgress.pendingProps;12        if (oldProps !== newProps || hasContextChanged() || ( // Force a re-render if the implementation changed due to hot reload:13                workInProgress.type !== current$$1.type)) {14            // If props or context changed, mark the fiber as having performed work.15            // This may be unset if the props are determined to be equal later (memo).16            didReceiveUpdate = true;17        } else if (updateExpirationTime < renderExpirationTime) {18            didReceiveUpdate = false; // This fiber does not have any pending work. Bailout without entering19            // the begin phase. There's still some bookkeeping we that needs to be done20            // in this optimized path, mostly pushing stuff onto the stack....

Using AI Code Generation

1const playwright = require("playwright");2(async () => {3  const browser = await playwright.chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.evaluate(() => {7    window.remountFiber();8  });9  await page.screenshot({ path: `example.png` });10  await browser.close();11})();12const playwright = require("playwright");13(async () => {14  const browser = await playwright.chromium.launch();15  const context = await browser.newContext();16  const page = await context.newPage();17  await page.evaluate(() => {18    window.remountFiber();19  });20  await page.screenshot({ path: `example.png` });21  await browser.close();22})();23const playwright = require("playwright");24(async () => {25  const browser = await playwright.chromium.launch();26  const context = await browser.newContext();27  const page = await context.newPage();28  await page.evaluate(() => {29    window.remountFiber();30  });31  await page.screenshot({ path: `example.png` });32  await browser.close();33})();34const playwright = require("playwright");35(async () => {36  const browser = await playwright.chromium.launch();37  const context = await browser.newContext();38  const page = await context.newPage();39  await page.evaluate(() => {40    window.remountFiber();41  });42  await page.screenshot({ path: `example.png` });43  await browser.close();44})();45const playwright = require("playwright");46(async () => {47  const browser = await playwright.chromium.launch();48  const context = await browser.newContext();49  const page = await context.newPage();50  await page.evaluate(() => {51    window.remountFiber();52  });53  await page.screenshot({ path: `example.png` });54  await browser.close();55})();

Using AI Code Generation

1const { chromium } = require('playwright');2const { remountFiber } = require('playwright/lib/server/fiber');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  await remountFiber(page, true);7  await page.screenshot({ path: 'example.png' });8  await browser.close();9})();10const { chromium } = require('playwright');11const { remountFiber } = require('playwright/lib/server/fiber');12(async () => {13  const browser = await chromium.launch();14  const page = await browser.newPage();15  await remountFiber(page, false);16  await page.screenshot({ path: 'example.png' });17  await browser.close();18})();

Using AI Code Generation

1const { remountFiber } = require('playwright/lib/server/domFiber');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch({ headless: false });5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.waitForSelector('input[title="Search"]');8  const elementHandle = await page.$('input[title="Search"]');9  await remountFiber(elementHandle);10  await elementHandle.click();11  await page.keyboard.type('Hello World');12  await browser.close();13})();14Error: Protocol error (Runtime.callFunctionOn): Object reference chain is too long

Using AI Code Generation

1const { remountFiber } = require('playwright/lib/server/fiber');2remountFiber();3const { chromium } = require('playwright');4(async () => {5  const browser = await chromium.launch();6  const context = await browser.newContext();7  const page = await context.newPage();8  await page.screenshot({ path: 'example.png' });9  await browser.close();10})();11{12  "scripts": {13  },14  "dependencies": {15  }16}

Using AI Code Generation

1const { remountFiber } = require('playwright/lib/server/ffox/ffoxConnection');2const { firefox } = require('playwright');3(async () => {4  const browser = await firefox.launch();5  const page = await browser.newPage();6  await remountFiber(page);7  await browser.close();8})();

Using AI Code Generation

1const { remountFiber } = require('playwright/lib/server/domFiber');2const { context } = require('playwright/lib/server/chromium/crBrowser');3const { Page } = require('playwright/lib/server/chromium/crPage');4const { ElementHandle } = require('playwright/lib/server/dom');5const { Frame } = require('playwright/lib/server/chromium/crFrame');6const { chromium } = require('playwright');7(async () => {8  const browser = await chromium.launch();9  const page = await browser.newPage();10  await page.waitForSelector('text=Get started');11  await page.click('text=Get started');12  await page.waitForSelector('text=Installation');13  await page.click('text=Installation');14  await page.waitForSelector('text=Playwright for Node.js');15  await page.click('text=Playwright for Node.js');16  await page.waitForSelector('text=Installation');17  await page.click('text=Installation');18  await page.waitForSelector('text=Playwright for Java');19  await page.click('text=Playwright for Java');20  const pageElementHandle = await page.$('text=Playwright for Java');21  const pageElement = await pageElementHandle._element;22  const frame = await pageElementHandle._frame;23  const context = await frame._context;24  await remountFiber(pageElementHandle._context, pageElement, frame);25  await pageElementHandle.click();26  await page.waitForSelector('text=Installation');27  await page.click('text=Installation');28  await page.waitForSelector('text=Playwright for Java');29  await page.click('text=Playwright for Java');30  await page.waitForSelector('text=Installation');31  await page.click('text=Installation');32  await page.waitForSelector('text=Playwright for Java');33  await page.click('text=Playwright for Java');34  await page.waitForSelector('text=Installation');35  await page.click('text=Installation');36  await page.waitForSelector('text=Playwright for Java');37  await page.click('text=Playwright for Java');38  await page.waitForSelector('text=Installation');39  await page.click('text=Installation');40  await page.waitForSelector('text=Playwright for Java');41  await page.click('text=Playwright for Java');42  await page.waitForSelector('text=Installation');

Using AI Code Generation

1const { remountFiber } = require('playwright/lib/server/fiber');2(async () => {3  await remountFiber();4})();5import { test } from '@playwright/test';6test('test', async ({ page }) => {7  const title = await page.title();8  expect(title).toBe('Playwright');9});

Using AI Code Generation

1const { remountFiber } = require('playwright-core/lib/server/fiber');2const { test } = require('@playwright/test');3test('remount fiber', async ({ page }) => {4  const fiber = remountFiber(page);5  console.log(fiber);6});7const { test } = require('@playwright/test');8test('remount fiber', async ({ page }) => {9});

Using AI Code Generation

1const { remountFiber } = require('playwright/lib/server/domFiber.js');2const { Page } = require('playwright/lib/server/page.js');3const { createPage } = require('playwright/lib/server/chromium.js');4const page = await createPage(browserContext, { viewport: null, hasTouch: false, isMobile: false, isDesktop: false, browserName: 'chromium' });5remountFiber(page, page._frameManager.mainFrame()._context);6console.log(await page.title());7await page.close();8await browser.close();9await browserContext.close();10const page = await createPage(browserContext, { viewport: null, hasTouch: false, isMobile: false, isDesktop: false, browserName: 'chromium' });11const { remountFiber } = require('playwright/lib/server/domFiber.js');12const { Page } = require('playwright/lib/server/page.js');13const { createPage } = require('playwright/lib/server/chromium.js');14const page = await createPage(browserContext, { viewport: null, hasTouch: false, isMobile: false, isDesktop: false, browserName: 'chromium' });15remountFiber(page, page._frameManager.mainFrame()._context);16console.log(await page.title());17await page.close();18await browser.close();19await browserContext.close();20const { remountFiber } = require('playwright/lib/server/dom

Playwright tutorial

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:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.