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How to use precacheChildNodes method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactDOMComponentTree.js

Source:ReactDOMComponentTree.js

...59 * the DOM nodes we see. To avoid this, ReactMultiChild calls60 * `prepareToManageChildren` before we change `_renderedChildren`, at which61 * time the container's child nodes are always cached (until it unmounts).62 */63function precacheChildNodes(inst, node) {64  if (inst._flags & Flags.hasCachedChildNodes) {65    return;66  }67  var children = inst._renderedChildren;68  var childNode = node.firstChild;69  outer: for (var name in children) {70    if (!children.hasOwnProperty(name)) {71      continue;72    }73    var childInst = children[name];74    var childID = getRenderedNativeOrTextFromComponent(childInst)._domID;75    if (childID == null) {76      // We're currently unmounting this child in ReactMultiChild; skip it.77      continue;78    }79    // We assume the child nodes are in the same order as the child instances.80    for (; childNode !== null; childNode = childNode.nextSibling) {81      if ((childNode.nodeType === 1 &&82           childNode.getAttribute(ATTR_NAME) === String(childID)) ||83          (childNode.nodeType === 8 &&84           childNode.nodeValue === ' react-text: ' + childID + ' ') ||85          (childNode.nodeType === 8 &&86           childNode.nodeValue === ' react-empty: ' + childID + ' ')) {87        precacheNode(childInst, childNode);88        continue outer;89      }90    }91    // We reached the end of the DOM children without finding an ID match.92    invariant(false, 'Unable to find element with ID %s.', childID);93  }94  inst._flags |= Flags.hasCachedChildNodes;95}96/**97 * Given a DOM node, return the closest ReactDOMComponent or98 * ReactDOMTextComponent instance ancestor.99 */100function getClosestInstanceFromNode(node) {101  if (node[internalInstanceKey]) {102    return node[internalInstanceKey];103  }104  // Walk up the tree until we find an ancestor whose instance we have cached.105  var parents = [];106  while (!node[internalInstanceKey]) {107    parents.push(node);108    if (node.parentNode) {109      node = node.parentNode;110    } else {111      // Top of the tree. This node must not be part of a React tree (or is112      // unmounted, potentially).113      return null;114    }115  }116  var closest;117  var inst;118  for (; node && (inst = node[internalInstanceKey]); node = parents.pop()) {119    closest = inst;120    if (parents.length) {121      precacheChildNodes(inst, node);122    }123  }124  return closest;125}126/**127 * Given a DOM node, return the ReactDOMComponent or ReactDOMTextComponent128 * instance, or null if the node was not rendered by this React.129 */130function getInstanceFromNode(node) {131  var inst = getClosestInstanceFromNode(node);132  if (inst != null && inst._nativeNode === node) {133    return inst;134  } else {135    return null;136  }137}138/**139 * Given a ReactDOMComponent or ReactDOMTextComponent, return the corresponding140 * DOM node.141 */142function getNodeFromInstance(inst) {143  // Without this first invariant, passing a non-DOM-component triggers the next144  // invariant for a missing parent, which is super confusing.145  invariant(146    inst._nativeNode !== undefined,147    'getNodeFromInstance: Invalid argument.'148  );149  if (inst._nativeNode) {150    return inst._nativeNode;151  }152  // Walk up the tree until we find an ancestor whose DOM node we have cached.153  var parents = [];154  while (!inst._nativeNode) {155    parents.push(inst);156    invariant(157      inst._nativeParent,158      'React DOM tree root should always have a node reference.'159    );160    inst = inst._nativeParent;161  }162  // Now parents contains each ancestor that does *not* have a cached native163  // node, and `inst` is the deepest ancestor that does.164  for (; parents.length; inst = parents.pop()) {165    precacheChildNodes(inst, inst._nativeNode);166  }167  return inst._nativeNode;168}169var ReactDOMComponentTree = {170  getClosestInstanceFromNode: getClosestInstanceFromNode,171  getInstanceFromNode: getInstanceFromNode,172  getNodeFromInstance: getNodeFromInstance,173  precacheChildNodes: precacheChildNodes,174  precacheNode: precacheNode,175  uncacheNode: uncacheNode,176};...

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  await page.precacheChildNodes('input[name="q"]');7  await page.type('input[name="q"]', 'Hello');8  await page.screenshot({ path: 'google.png' });9  await browser.close();10})();

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  await page.precacheChildNodes("body");7  await page.screenshot({ path: "google.png" });8  await browser.close();9})();10const { chromium } = require("playwright");11const { precacheChildNodes } = require("@playwright/test-utils");12(async () => {13  const browser = await chromium.launch();14  const context = await browser.newContext();15  const page = await context.newPage();16  await precacheChildNodes(page, "body");17  await page.screenshot({ path: "google.png" });18  await browser.close();19})();20precacheChildNodes(page, selector, options);

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  await page.precacheChildNodes('css=div');7  await page.waitForTimeout(5000);8  await browser.close();9})();

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch({ headless: false, slowMo: 50 });4  const context = await browser.newContext();5  await context.tracing.start({ screenshots: true, snapshots: true });6  const page = await context.newPage();7  await page.precacheChildNodes('html');8  await page.tracing.stop({ path: 'trace.zip' });9  await browser.close();10})();11#### tracing.start(options)12#### tracing.stop(options)13#### tracing.path()14#### tracing.screenshots()15#### tracing.snapshots()16#### page.tracing.start(options)

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  await page.precacheChildNodes();6  await page.screenshot({ path: `example.png` });7  await browser.close();8})();9const { chromium } = require('playwright');10(async () => {11  const browser = await chromium.launch();12  const page = await browser.newPage();13  const dom = await page.fetch();14  console.log(dom);15  await browser.close();16})();17const puppeteer = require('puppeteer');18(async () => {19  const browser = await puppeteer.launch();20  const page = await browser.newPage();21  const dom = await page.evaluateHandle(() => document);22  console.log(dom);23  await browser.close();24})();25const { chromium } = require('playwright');26(async () => {27  const browser = await chromium.launch();28  const page = await browser.newPage();29  const dom = await page.fetch();30  console.log(dom);31  await browser.close();32})();33const puppeteer = require('puppeteer');34(async () => {35  const browser = await puppeteer.launch();36  const page = await browser.newPage();37  const dom = await page.evaluateHandle(() => document);

Using AI Code Generation

1const { chromium, devices } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  const client = await page.context().newCDPSession(page);7  await client.send('DOM.enable');8  await client.send('DOM.precacheChildNodes', { nodeId: 1 });9  await browser.close();10})();

Using AI Code Generation

1const { chromium } = require('playwright');2const { precacheChildNodes } = require('playwright/lib/server/supplements/recorder/recorderSupplement');3const fs = require('fs');4(async () => {5  const browser = await chromium.launch();6  const context = await browser.newContext();7  const page = await context.newPage();8  await precacheChildNodes(page);9  const html = await page.content();10  fs.writeFileSync('test.html', html);11  await browser.close();12})();

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Playwright tutorial

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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.