Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Register for FREE! Join TestMu Conference

How to use prepareToHydrateHostInstance method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberHydrationContext.js

Source:ReactFiberHydrationContext.js

...19export type HydrationContext<C> = {20  enterHydrationState(fiber: Fiber): boolean,21  resetHydrationState(): void,22  tryToClaimNextHydratableInstance(fiber: Fiber): void,23  prepareToHydrateHostInstance(fiber: Fiber, rootContainerInstance: C): boolean,24  prepareToHydrateHostTextInstance(fiber: Fiber): boolean,25  popHydrationState(fiber: Fiber): boolean,26};27module.exports = function<T, P, I, TI, PI, C, CX, PL>(28  config: HostConfig<T, P, I, TI, PI, C, CX, PL>,29): HydrationContext<C> {30  const {31    shouldSetTextContent,32    canHydrateInstance,33    canHydrateTextInstance,34    getNextHydratableSibling,35    getFirstHydratableChild,36    hydrateInstance,37    hydrateTextInstance,38  } = config;39  // If this doesn't have hydration mode.40  if (41    !(canHydrateInstance &&42      canHydrateTextInstance &&43      getNextHydratableSibling &&44      getFirstHydratableChild &&45      hydrateInstance &&46      hydrateTextInstance)47  ) {48    return {49      enterHydrationState() {50        return false;51      },52      resetHydrationState() {},53      tryToClaimNextHydratableInstance() {},54      prepareToHydrateHostInstance() {55        invariant(false, 'React bug.');56      },57      prepareToHydrateHostTextInstance() {58        invariant(false, 'React bug.');59      },60      popHydrationState(fiber: Fiber) {61        return false;62      },63    };64  }65  // The deepest Fiber on the stack involved in a hydration context.66  // This may have been an insertion or a hydration.67  let hydrationParentFiber: null | Fiber = null;68  let nextHydratableInstance: null | I | TI = null;69  let isHydrating: boolean = false;70  function enterHydrationState(fiber: Fiber) {71    const parentInstance = fiber.stateNode.containerInfo;72    nextHydratableInstance = getFirstHydratableChild(parentInstance);73    hydrationParentFiber = fiber;74    isHydrating = true;75    return true;76  }77  function deleteHydratableInstance(returnFiber: Fiber, instance: I | TI) {78    const childToDelete = createFiberFromHostInstanceForDeletion();79    childToDelete.stateNode = instance;80    childToDelete.return = returnFiber;81    childToDelete.effectTag = Deletion;82    // This might seem like it belongs on progressedFirstDeletion. However,83    // these children are not part of the reconciliation list of children.84    // Even if we abort and rereconcile the children, that will try to hydrate85    // again and the nodes are still in the host tree so these will be86    // recreated.87    if (returnFiber.lastEffect !== null) {88      returnFiber.lastEffect.nextEffect = childToDelete;89      returnFiber.lastEffect = childToDelete;90    } else {91      returnFiber.firstEffect = returnFiber.lastEffect = childToDelete;92    }93  }94  function canHydrate(fiber, nextInstance) {95    switch (fiber.tag) {96      case HostComponent: {97        const type = fiber.type;98        const props = fiber.memoizedProps;99        return canHydrateInstance(nextInstance, type, props);100      }101      case HostText: {102        return canHydrateTextInstance(nextInstance);103      }104      default:105        return false;106    }107  }108  function tryToClaimNextHydratableInstance(fiber: Fiber) {109    if (!isHydrating) {110      return;111    }112    let nextInstance = nextHydratableInstance;113    if (!nextInstance) {114      // Nothing to hydrate. Make it an insertion.115      fiber.effectTag |= Placement;116      isHydrating = false;117      hydrationParentFiber = fiber;118      return;119    }120    if (!canHydrate(fiber, nextInstance)) {121      // If we can't hydrate this instance let's try the next one.122      // We use this as a heuristic. It's based on intuition and not data so it123      // might be flawed or unnecessary.124      nextInstance = getNextHydratableSibling(nextInstance);125      if (!nextInstance || !canHydrate(fiber, nextInstance)) {126        // Nothing to hydrate. Make it an insertion.127        fiber.effectTag |= Placement;128        isHydrating = false;129        hydrationParentFiber = fiber;130        return;131      }132      // We matched the next one, we'll now assume that the first one was133      // superfluous and we'll delete it. Since we can't eagerly delete it134      // we'll have to schedule a deletion. To do that, this node needs a dummy135      // fiber associated with it.136      deleteHydratableInstance(137        (hydrationParentFiber: any),138        nextHydratableInstance,139      );140    }141    fiber.stateNode = nextInstance;142    hydrationParentFiber = fiber;143    nextHydratableInstance = getFirstHydratableChild(nextInstance);144  }145  function prepareToHydrateHostInstance(146    fiber: Fiber,147    rootContainerInstance: C,148  ): boolean {149    const instance: I = fiber.stateNode;150    const updatePayload = hydrateInstance(151      instance,152      fiber.type,153      fiber.memoizedProps,154      rootContainerInstance,155      fiber,156    );157    // TODO: Type this specific to this type of component.158    fiber.updateQueue = (updatePayload: any);159    // If the update payload indicates that there is a change or if there...

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch({ headless: false });4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.screenshot({ path: 'example.png' });7  await browser.close();8})();

Using AI Code Generation

1const { prepareToHydrateHostInstance } = require('playwright');2const { chromium } = require('playwright');3const fs = require('fs');4const path = require('path');5const { promisify } = require('util');6const readFile = promisify(fs.readFile);7const writeFile = promisify(fs.writeFile);8const appendFile = promisify(fs.appendFile);9(async () => {10  const browser = await chromium.launch();11  const context = await browser.newContext();12  const page = await context.newPage();13  const handle = await page.$('h1');14  const content = await handle.innerHTML();15  await appendFile('test.txt', content);16  await writeFile('test.txt', content);17  await page.close();18  await context.close();19  await browser.close();20})();

Using AI Code Generation

1const { prepareToHydrateHostInstance } = require('playwright/lib/server/dom.js');2const { ElementHandle } = require('playwright/lib/server/dom.js');3const { prepareToHydrateHostInstance } = require('playwright/lib/server/dom.js');4const { ElementHandle } = require('playwright/lib/server/dom.js');5const { prepareToHydrateHostInstance } = require('playwright/lib/server/dom.js');6const { ElementHandle } = require('playwright/lib/server/dom.js');7const { prepareToHydrateHostInstance } = require('playwright/lib/server/dom.js');8const { ElementHandle } = require('playwright/lib/server/dom.js');9const { prepareToHydrateHostInstance } = require('playwright/lib/server/dom.js');10const { ElementHandle } = require('playwright/lib/server/dom.js');11const { prepareToHydrateHostInstance } = require('playwright/lib/server/dom.js');12const { ElementHandle } = require('playwright/lib/server/dom.js');13const { prepareToHydrateHostInstance } = require('playwright/lib/server/dom.js');14const { ElementHandle } = require('playwright/lib/server/dom.js');15const { prepareToHydrateHostInstance } = require('playwright/lib/server/dom.js');16const { ElementHandle } = require('playwright/lib/server/dom.js');17const { prepareToHydrateHostInstance } = require('playwright/lib/server/dom.js');18const { ElementHandle } = require('playwright/lib/server/dom.js');19const { prepareToHydrateHostInstance } = require('playwright/lib/server/dom.js');

Using AI Code Generation

1const { prepareToHydrateHostInstance } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement.js');2const { chromium } = require('playwright-core');3const { chromiumLauncher } = require('playwright-core/lib/server/chromium/chromiumLauncher.js');4const { chromiumType } = require('playwright-core/lib/server/chromium/chromiumType.js');5const { chromiumBrowser } = require('playwright-core/lib/server/chromium/chromiumBrowser.js');6const { chromiumBrowserContext } = require('playwright-core/lib/server/chromium/chromiumBrowserContext.js');7const { chromiumPage } = require('playwright-core/lib/server/chromium/chromiumPage.js');8const { chromiumFrame } = require('playwright-core/lib/server/chromium/chromiumFrame.js');9(async () => {10  const browser = await chromium.launch();11  const context = await browser.newContext();12  const page = await context.newPage();13  const frame = page.mainFrame();14  const element = await page.$('input');15  prepareToHydrateHostInstance(element);16  await browser.close();17})();

Using AI Code Generation

1const { prepareToHydrateHostInstance } = 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');7  const internalElement = await element._elementHandle._context._adoptBackendNodeId(element._elementHandle._remoteObject.objectId);8  prepareToHydrateHostInstance(internalElement);9  await page.close();10  await browser.close();11})();

Using AI Code Generation

1async function hydratePage() {2  const { prepareToHydrateHostInstance } = require('playwright/lib/server/chromium/crPage');3  const { page } = await browser.newPage();4  const { frame } = page.mainFrame();5  const element = await frame.$('input[name="q"]');6  const context = await page.mainFrame().executionContext();7  const handle = await context.evaluateHandle(element => element, element);8  await prepareToHydrateHostInstance(page, handle);9  await page.evaluate(element => {10    element.value = 'test';11  }, element);12  await page.close();13}14hydratePage();15const browser = await playwright.chromium.launch({16});17const browser = await playwright.chromium.launch({18});19const browser = await playwright.chromium.launch({20});

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.