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How to use propagateContextChange method in Playwright Internal
Best JavaScript code snippet using playwright-internal
ReactFiberNewContext.js
Source:ReactFiberNewContext.js 
...119 }120 return changedBits | 0;121 }122}123export function propagateContextChange(124 workInProgress: Fiber,125 context: ReactContext<mixed>,126 changedBits: number,127 renderExpirationTime: ExpirationTime,128): void {129 let fiber = workInProgress.child;130 if (fiber !== null) {131 // Set the return pointer of the child to the work-in-progress fiber.132 fiber.return = workInProgress;133 }134 while (fiber !== null) {135 let nextFiber;136 // Visit this fiber.137 let dependency = fiber.firstContextDependency;138 if (dependency !== null) {139 do {140 // Check if the context matches.141 if (142 dependency.context === context &&143 (dependency.observedBits & changedBits) !== 0144 ) {145 // Match! Schedule an update on this fiber.146 if (147 fiber.expirationTime === NoWork ||148 fiber.expirationTime > renderExpirationTime149 ) {150 fiber.expirationTime = renderExpirationTime;151 }152 let alternate = fiber.alternate;153 if (154 alternate !== null &&155 (alternate.expirationTime === NoWork ||156 alternate.expirationTime > renderExpirationTime)157 ) {158 alternate.expirationTime = renderExpirationTime;159 }160 // Update the child expiration time of all the ancestors, including161 // the alternates.162 let node = fiber.return;163 while (node !== null) {164 alternate = node.alternate;165 if (166 node.childExpirationTime === NoWork ||167 node.childExpirationTime > renderExpirationTime168 ) {169 node.childExpirationTime = renderExpirationTime;170 if (171 alternate !== null &&172 (alternate.childExpirationTime === NoWork ||173 alternate.childExpirationTime > renderExpirationTime)174 ) {175 alternate.childExpirationTime = renderExpirationTime;176 }177 } else if (178 alternate !== null &&179 (alternate.childExpirationTime === NoWork ||180 alternate.childExpirationTime > renderExpirationTime)181 ) {182 alternate.childExpirationTime = renderExpirationTime;183 } else {184 // Neither alternate was updated, which means the rest of the185 // ancestor path already has sufficient priority.186 break;187 }188 node = node.return;189 }190 // Don't scan deeper than a matching consumer. When we render the191 // consumer, we'll continue scanning from that point. This way the192 // scanning work is time-sliced.193 nextFiber = null;194 } else {195 nextFiber = fiber.child;196 }197 dependency = dependency.next;198 } while (dependency !== null);199 } else if (fiber.tag === ContextProvider) {200 // Don't scan deeper if this is a matching provider201 nextFiber = fiber.type === workInProgress.type ? null : fiber.child;202 } else {203 // Traverse down.204 nextFiber = fiber.child;205 }206 if (nextFiber !== null) {207 // Set the return pointer of the child to the work-in-progress fiber.208 nextFiber.return = fiber;209 } else {210 // No child. Traverse to next sibling.211 nextFiber = fiber;212 while (nextFiber !== null) {213 if (nextFiber === workInProgress) {214 // We're back to the root of this subtree. Exit.215 nextFiber = null;216 break;217 }218 let sibling = nextFiber.sibling;219 if (sibling !== null) {220 // Set the return pointer of the sibling to the work-in-progress fiber.221 sibling.return = nextFiber.return;222 nextFiber = sibling;223 break;224 }225 // No more siblings. Traverse up.226 nextFiber = nextFiber.return;227 }228 }229 fiber = nextFiber;230 }231}232export function prepareToReadContext(233 workInProgress: Fiber,234 renderExpirationTime: ExpirationTime,235): boolean {236 currentlyRenderingFiber = workInProgress;237 lastContextDependency = null;238 lastContextWithAllBitsObserved = null;239 const firstContextDependency = workInProgress.firstContextDependency;240 if (firstContextDependency !== null) {241 // Reset the work-in-progress list242 workInProgress.firstContextDependency = null;243 // Iterate through the context dependencies and see if there were any244 // changes. If so, continue propagating the context change by scanning245 // the child subtree.246 let dependency = firstContextDependency;247 let hasPendingContext = false;248 do {249 const context = dependency.context;250 const changedBits = isPrimaryRenderer251 ? context._changedBits252 : context._changedBits2;253 if (changedBits !== 0) {254 // Resume context change propagation. We need to call this even if255 // this fiber bails out, in case deeply nested consumers observe more256 // bits than this one.257 propagateContextChange(258 workInProgress,259 context,260 changedBits,261 renderExpirationTime,262 );263 if ((changedBits & dependency.observedBits) !== 0) {264 hasPendingContext = true;265 }266 }267 dependency = dependency.next;268 } while (dependency !== null);269 return hasPendingContext;270 } else {271 return false;...
ReactFiberNewContext.old.js
Source:ReactFiberNewContext.old.js
...82 }83 node = node.return;84 }85 }86 function propagateContextChange(workInProgress, context, changedBits, renderLanes) {87 var fiber = workInProgress.child;88 if (fiber !== null) {89 // Set the return pointer of the child to the work-in-progress fiber.90 fiber.return = workInProgress;91 }92 while (fiber !== null) {93 var nextFiber = void 0; // Visit this fiber.94 var list = fiber.dependencies;95 if (list !== null) {96 nextFiber = fiber.child;97 var dependency = list.firstContext;98 while (dependency !== null) {99 // Check if the context matches.100 if (dependency.context === context && (dependency.observedBits & changedBits) !== 0) {...
ReactFiberBeginWork.js
Source:ReactFiberBeginWork.js
...45 // }46 // } else {47 // // The context value changed. Search for matching consumers and schedule48 // // them to update.49 // propagateContextChange(workInProgress, context, changedBits);50 // }51 }52 var newChildren = newProps.children;53 reconcileChildren(current$$1, workInProgress, newChildren);54 return workInProgress.child;55 }56function updateFunctionComponent(current, workInProgress, Component) {57 // //åä¸ä¸ªç»ä»¶ä¸å¤æ¬¡è°ç¨hook58 const nextChildren = renderWithHooks(workInProgress, Component);59 reconcileChildren(current, workInProgress, nextChildren);60 return workInProgress.child61}62function updateHostComponent(current, workInProgress) {63 // DOMèç¹å...
ContextExample.jsx
Source:ContextExample.jsx
1import * as React from "react";2const { Fragment } = React;3/*4 This example demonstrates how React will not call render on components between5 a Context.Provider and Context.Consumer but still traverses down the tree6 performing work.7 Examining the logs of pressing Toggle show that "rendering MyChild" and8 "rendering Time" are never logged when the only update is a Provider change,9 but the ReactTracer still calls "performUnitOfWork" on fibers between the10 Provider and Consumer. Most of these intermediate fibers bailout since props11 haven't changed (1). Fibers that aren't between the Provider and Consumer12 return null in beginWork so their subtree is skipped (no child update is13 scheduled) (2) while Fibers between the Provider and Consumer do return their14 child since one of their children has an update scheduled (3).15 (1) https://github.com/facebook/react/blob/b4f119cdf1defe2437e00022f670c6ef818cd43f/packages/react-reconciler/src/ReactFiberBeginWork.new.js#L325216 (2) https://github.com/facebook/react/blob/b4f119cdf1defe2437e00022f670c6ef818cd43f/packages/react-reconciler/src/ReactFiberBeginWork.new.js#L314017 (3) https://github.com/facebook/react/blob/b4f119cdf1defe2437e00022f670c6ef818cd43f/packages/react-reconciler/src/ReactFiberBeginWork.new.js#L314718*/19/*20 # To investigate:21 ## How React propagates context value changes22 Relevant files and functions:23 - updateContextProvider24 Called when a Provider is rendered25 https://github.com/facebook/react/blob/46a0f050aacd8b2159b8db99b599a4b69e682189/packages/react-reconciler/src/ReactFiberBeginWork.new.js#L311426 - pushProvider27 Not sure what this does yet28 https://github.com/facebook/react/blob/46a0f050aacd8b2159b8db99b599a4b69e682189/packages/react-reconciler/src/ReactFiberNewContext.new.js#L8729 - propagateContextChange30 Actually marks dirty context consumers, though not when LazyContextPropagation is on31 https://github.com/facebook/react/blob/46a0f050aacd8b2159b8db99b599a4b69e682189/packages/react-reconciler/src/ReactFiberNewContext.new.js#L16932 Current experiment to change the behavior:33 PR: https://github.com/facebook/react/pull/2089034 RFC: https://github.com/reactjs/rfcs/pull/11835*/36const ctx = React.createContext(null);37class MyProvider extends React.Component {38 constructor(props) {39 super(props);40 this.state = { value: 0 };41 }42 toggle() {43 this.setState(({ value }) => ({ value: (value + 1) % 2 }));44 }45 render() {46 console.log("rendering MyProvider");47 return (48 <Fragment>49 <div>50 <button onClick={() => this.toggle()}>Toggle</button>51 </div>52 <ctx.Provider value={this.state.value}>53 {this.props.children}54 </ctx.Provider>55 </Fragment>56 );57 }58}59const Time = () => {60 console.log("Rendering Time");61 return <div>{Date.now()}</div>;62};63const MyChild = () => {64 console.log("rendering MyChild");65 return (66 <Fragment>67 {Date.now()}68 <Time />69 <ctx.Consumer>70 {(value) => {71 return <p>{value}</p>;72 }}73 </ctx.Consumer>74 <Time />75 </Fragment>76 );77};78export function ContextExample() {79 console.log("rendering ContentExample");80 return (81 <Fragment>82 <h2>Context Example</h2>83 <MyProvider>84 <MyChild />85 </MyProvider>86 </Fragment>87 );...
Using AI Code Generation
1const { propagateContextChange } = require('playwright/lib/server/chromium/crBrowser');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 await page.screenshot({ path: 'google.png' });8 await propagateContextChange(context);9 await page.screenshot({ path: 'yahoo.png' });10 await browser.close();11})();
Using AI Code Generation
1const { chromium } = require('playwright');const { propagateContextChange } = require('playwright/lib/server/chromium/crBrowser');2const { propagateContextChange } = require('{ chromiht/lib/server/curomium/crBrowser');3const { BrowserContexm } } = require('playwrit/lib/server/browserContexgh);4(async () => {5 const browser = await chromium.launch();6 const context = await browser.newContext();7 const page = await context.newPage(t');8 (onst newCastext = await browyer.newContext();9 awaincpropagateContextChange(newContext, page);10 await browser.close();11})();12const (Brow)erCont x= } = require('../browserContext');13 * @param {!BrowserContext} context14 * @param {!Page} page15module.exports.propagateContext>hange = async functi {(cont, page) {16 const client = await page._mainFrame._clien;17 await client.send('Target.setDiscoverTargets' { discover: true });18 const { targetInfos } = await client.send('Target.getTargets');19 for (const targetInfo of targetInfos) {20 if (targetInfo.type === 'page' && targetInfo.openerId) {21 const target = await context._browser._targets.get(targetInfo.targetId);22 if (target)23 await target._page._didAttachToTarget();24 }25 }26};27const crBrowser = require('./chromium/crBrowsr');28const {BrowserContext } = require('./browserContext');29const { assert uire('../utils/tls');30BrowserContext.pototype.propagateContextChange = async function(contxt) {31 assertthis._browser._isChromium, Not suported');32 await crBrowser.propagateContextChange(context, this);33};34cons { Page } = require('.page');35const { asert } = requir('../utils/utis');36Page.prototype.propagateContextChang = async function(ontext) {37 assert(this._browserContext._browser._isChromium, 'No suppted');38 await this._browserContext.propagateContextChange(context);39};40const { Page } = require('../page');
Using AI Code Generation
1const aywright = require(playwright'2const { setContext, propagateContextChange } = require('playwright/lib/client/selectorImpl'); const browser = await chromium.launch();3 const context = await browser.newContext();4 const page = await context.newPage();5 await page.screenshot({ path: 'google.png' });6 await propagateContextChange(context);7 await page.screenshot({ path: 'yahoo.png' });8 await browser.close();9})();
Using AI Code Generation
1const { propagateContextChange } = require('playwright/lib/server/chromium/crBrowser');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 await page.screenshot({ path: 'google.png' });8 await propagateContextChange(context);9 await page.screenshot({ path: 'yahoo.png' });10 await browser.close();11})();
Using AI Code Generation
1const playwright = require('playwright');2const { setContext, propagateContextChange } = require('playwright/lib/client/selectorImpl');3(async () => {4 const browser = await playwright.chromium.launch({ headless: false });5 const context = await browser.newContext();6 const page = await context.newPage();7 await page.click('text=Get started');8 await page.waitForSelector('text=Playwright is a Node.js library to automate Chromium, Firefox and WebKit with a single API');9 console.log(await page.textContent('text=Playwright is a Node.js library to automate Chromium, Firefox and WebKit with a single API'));10 setContext({ name: 'foo', value: 'bar' });11 propagateContextChange();12 await page.waitForSelector('text=Playwright is a Node.js library to automate Chromium, Firefox and WebKit with a single API');13 console.log(await page.textContent('text=Playwright is a Node.js library to automate Chromium, Firefox and WebKit with a single API'));14 await browser.close();15})();
Using AI Code Generation
1const playwright = require('playwright');2const { setContext, propagateContextChange } = require('playwright/lib/client/selectorImpl');3(async () => {4 const browser = await playwright.chromium.launch({ headless: false });5 const context = await browser.newContext();6 const page = await context.newPage();7 await page.click('text=Get started');8 await page.waitForSelector('text=Playwright is a Node.js library to automate Chromium, Firefox and WebKit with a single API');9 console.log(await page.textContent('text=Playwright is a Node.js library to automate Chromium, Firefox and WebKit with a single API'));10 setContext({ name: 'foo', value: 'bar' });11 propagateContextChange();12 await page.waitForSelector('text=Playwright is a Node.js library to automate Chromium, Firefox and WebKit with a single API');13 console.log(await page.textContent('text);
Using AI Code Generation
1const playwright = require('playwright-core');2(async () => {3 const browser = await playwright.chromium.launch();4 const page = await browser.newPage();5 await page.screenshot({ path: 'example.png' });6 await browser.close();7})();
Using AI Code Generation
1import { PlaywrightInternal } from '@playwright/test';2const pwInternal = new PlaywrightInternal();3async function main() {4 await pwInternal.propagateContextChange({5 devices: {6 'Pixel 2': {7 viewport: {8 },9 userAgent: 'Mozilla/5.0 (Linux; Android 10; Pixel 2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Mobile Safari/537.36',10 userAgentMetadata: {11 },12 },13 },14 }=P15}16main();17import { test } from '@playwright/test';18test('test', async ({ page }) => {19 await page.waitForTimeout(5000);20});21Thanks for the reply. I have triedlaywright is a Node.js library to automate Chromium, Firefox and WebKit with a single API'));22 await browser.close();23})();
Using AI Code Generation
1const { context } = require("playwright-core/lib/server/browserContext");2context.propagateContextChange();3const { test } = require("@playwright/test");4test("test", async ({ page }) => {5});6const { test } = require("@playwright/test");7test("test", async ({ page }) => {8});
Using AI Code Generation
1const playwright = require('playwright-core');2(async () => {3 const browser = await playwright.chromium.launch(4 const page = await browser.newPage();5 await page.screenshot({ path: 'example.png' });6 await browser.close();7})();
Using AI Code Generation
1import { PlaywrightInternal } from '@playwright/test';2const pwInternal = new PlaywrightInternal();3async function main() {4 await pwInternal.propagateContextChange({5 devices: {6 'Pixel 2': {7 viewport: {8 },9 userAgent: 'Mozilla/5.0 (Linux; Android 10; Pixel 2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Mobile Safari/537.36',10 userAgentMetadata: {11 },12 },13 },14 });15}16main();17import { test } from '@playwright/test';18test('test', async ({ page }) => {19 await page.waitForTimeout(5000);20});21const { test } = require("@playwright/test");22test("test", async ({ page }) => {23});24const { test } = require("@playwright/test");25test("test", async ({ page }) => {26});27const { test } = require("@playwright/test");28test("test", async ({ page }) => {29});30const { test } = require("@playwright/test");31test("test", async ({ page }) => {32});33 const browser =:await laywtight.chremium.launch();34 const st.e = awsip browser.newPage();35 await page.screenshot({ path: 'example.png' });36 await browser.close();37})();
Using AI Code Generation
1const { propagateContextChange 2const { test } = require("@playwright/test");3test("test", async ({ page }) => {4});5const { test } = require("@playwright/test");6test("test", async ({ page }) => {7});8const { test } = require("@playwright/test");9test("test", async ({ page }) => {10});11const { test } = require("@playwright/test");12test("test", async ({ page }) => {
Using AI Code Generation
1const { context } = require('playwright');2const { propagateContextChange } = require('playwright/lib/server/browserContext');3propagateContextChange(context);4const browser = await chromium.launch();5const context = await browser.newContext();6const page = await context.newPage();7await page.screenshot({ path: 'example.png' });8await browser.close();9const { context } = require('playwright');10const { propagateContextChange } = require('playwright/lib/server/browserContext');11propagateContextChange(context);12const browser = await chromium.launch();13const context = await browser.newContext();14const page = await context.newPage();15await page.screenshot({ path: 'example.png' });16await browser.close();17const { context } = require('playwright');18const { propagateContextChange } = require('playwright/lib/server/browserContext');19propagateContextChange(context);20const browser = await chromium.launch();21const context = await browser.newContext();22const page = await context.newPage();23await page.screenshot({ path: 'example.png' });24await browser.close();25const { test } = require('@playwright/test');26test('basic test', async ({ page }) => {27});28Now, we will run the test. The code snippetw.google.com");
Using AI Code Generation
1const { propagateContextChange } = require('playwright/lib/server/browserContext');2const { Page } = require('playwright/lib/server/page');3const originalContextChange = Page.prototype.propagateContextChange;4Page.prototype.propagateContextChange = async function (contextPayload) {5 console.log('overriding propagateContextChange method');6 return originalContextChange.call(this, contextPayload);7};8propagateContextChange();
Using AI Code Generation
1const { context } = require('playwright');2const { propagateContextChange } = require('playwright/lib/server/browserContext');3propagateContextChange(context);4const browser = await chromium.launch();5const context = await browser.newContext();6const page = await context.newPage();7await page.screenshot({ path: 'example.png' });8await browser.close();9const { context } = require('playwright');10const { propagateContextChange } = require('playwright/lib/server/browserContext');11propagateContextChange(context);12const browser = await chromium.launch();13const context = await browser.newContext();14const page = await context.newPage();15await page.screenshot({ path: 'example.png' });16await browser.close();17const { context } = require('playwright');18const { propagateContextChange } = require('playwright/lib/server/browserContext');19propagateContextChange(context);20const browser = await chromium.launch();21const context = await browser.newContext();22const page = await context.newPage();23await page.screenshot({ path: 'example.png' });24await browser.close();25const { test } = require('@playwright/test');26test('basic test', async ({ page }) => {27});
Using AI Code Generation
1const { BrowserContext } = require('playwright');2BrowserContext.prototype.propagateContextChange = function () {3 this.emit(BrowserContext.Events.BrowserContextChanged);4};5const context = browser.newContext();6context.propagateContextChange();
Playwright tutorial
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