How to use updateValueIfChanged method in Playwright Internal

Best JavaScript code snippet using playwright-internal

Input.js

Source: Input.js Github

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...124 dispatchInputEvent(event, onChange, context, 'change', target);125 }126 dispatchChangeEvent(context, props, target);127}128function updateValueIfChanged(elem: Element | Document): boolean {129 /​/​ React's internal value tracker130 const valueTracker = (elem: any)._valueTracker;131 if (valueTracker == null) {132 return true;133 }134 const prevValue = valueTracker.getValue();135 const nextValue = getValueFromNode(elem);136 if (prevValue !== nextValue) {137 valueTracker.setValue(nextValue);138 return true;139 }140 return false;141}142function getValueFromNode(node: Element | Document): string {143 let value = '';144 if (!node) {145 return value;146 }147 if (isCheckable(node)) {148 value = (node: any).checked ? 'true' : 'false';149 } else {150 value = (node: any).value;151 }152 return value;153}154const inputResponderImpl = {155 targetEventTypes,156 onEvent(157 event: ReactDOMResponderEvent,158 context: ReactDOMResponderContext,159 props: InputResponderProps,160 ): void {161 const {type, target} = event;162 if (props.disabled) {163 return;164 }165 const currentTarget = context.getResponderNode();166 if (target !== currentTarget || currentTarget === null) {167 return;168 }169 switch (type) {170 default: {171 if (shouldUseChangeEvent(target) && type === 'change') {172 dispatchBothChangeEvents(event, context, props, currentTarget);173 } else if (174 isTextInputElement(target) &&175 (type === 'input' || type === 'change') &&176 updateValueIfChanged(target)177 ) {178 dispatchBothChangeEvents(event, context, props, currentTarget);179 } else if (180 isCheckable(target) &&181 type === 'click' &&182 updateValueIfChanged(target)183 ) {184 dispatchBothChangeEvents(event, context, props, currentTarget);185 }186 break;187 }188 }189 },190};191export const InputResponder = React.DEPRECATED_createResponder(192 'Input',193 inputResponderImpl,194);195export function useInput(196 props: InputResponderProps,...

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input.development.js

Source: input.development.js Github

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...69 dispatchInputEvent(event, onChange, context, 'change', target);70 }71 dispatchChangeEvent(context, props, target);72}73function updateValueIfChanged(elem) {74 /​/​ React's internal value tracker75 var valueTracker = elem._valueTracker;76 if (valueTracker == null) {77 return true;78 }79 var prevValue = valueTracker.getValue();80 var nextValue = getValueFromNode(elem);81 if (prevValue !== nextValue) {82 valueTracker.setValue(nextValue);83 return true;84 }85 return false;86}87function getValueFromNode(node) {88 var value = '';89 if (!node) {90 return value;91 }92 if (isCheckable(node)) {93 value = node.checked ? 'true' : 'false';94 } else {95 value = node.value;96 }97 return value;98}99var inputResponderImpl = {100 targetEventTypes: targetEventTypes,101 onEvent: function (event, context, props) {102 var type = event.type,103 target = event.target;104 if (props.disabled) {105 return;106 }107 var currentTarget = context.getResponderNode();108 if (target !== currentTarget || currentTarget === null) {109 return;110 }111 switch (type) {112 default:113 {114 if (shouldUseChangeEvent(target) && type === 'change') {115 dispatchBothChangeEvents(event, context, props, currentTarget);116 } else if (isTextInputElement(target) && (type === 'input' || type === 'change') && updateValueIfChanged(target)) {117 dispatchBothChangeEvents(event, context, props, currentTarget);118 } else if (isCheckable(target) && type === 'click' && updateValueIfChanged(target)) {119 dispatchBothChangeEvents(event, context, props, currentTarget);120 }121 break;122 }123 }124 }125};126var InputResponder = React.unstable_createResponder('Input', inputResponderImpl);127function useInput(props) {128 return React.unstable_useResponder(InputResponder, props);129}130var Input = Object.freeze({131 InputResponder: InputResponder,132 useInput: useInput...

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inputValueTracking-test.js

Source: inputValueTracking-test.js Github

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...81 it('should update value if it changed and return result', () => {82 inputValueTracking.track(mockComponent);83 input.value = 'foo';84 var tracker = mockComponent._wrapperState.valueTracker;85 expect(inputValueTracking.updateValueIfChanged(mockComponent)).toBe(false);86 tracker.setValue('bar');87 expect(inputValueTracking.updateValueIfChanged(mockComponent)).toBe(true);88 expect(tracker.getValue()).toEqual('foo');89 });90 it('should track value and return true when updating untracked instance', () => {91 input.value = 'foo';92 expect(inputValueTracking.updateValueIfChanged(mockComponent)).toBe(true);93 var tracker = mockComponent._wrapperState.valueTracker;94 expect(tracker.getValue()).toEqual('foo');95 });96 it('should return tracker from node', () => {97 var node = ReactTestUtils.renderIntoDocument(98 <input type="text" defaultValue="foo" /​>,99 );100 var tracker = inputValueTracking._getTrackerFromNode(node);101 expect(tracker.getValue()).toEqual('foo');102 });103 it('should stop tracking', () => {104 inputValueTracking.track(mockComponent);105 expect(mockComponent._wrapperState.hasOwnProperty('valueTracker')).toBe(106 true,...

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ReactEventsInput-prod.js

Source: ReactEventsInput-prod.js Github

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...39 "function" === typeof props &&40 ((target = getValueFromNode(target)),41 context.dispatchEvent(target, props, 0));42}43function updateValueIfChanged(elem) {44 var valueTracker = elem._valueTracker;45 if (null == valueTracker) return !0;46 var prevValue = valueTracker.getValue();47 elem = getValueFromNode(elem);48 return prevValue !== elem ? (valueTracker.setValue(elem), !0) : !1;49}50function getValueFromNode(node) {51 var value = "";52 return node53 ? (value = isCheckable(node)54 ? node.checked55 ? "true"56 : "false"57 : node.value)58 : value;59}60var InputResponder = React.unstable_createResponder("Input", {61 targetEventTypes: ["input", "change", "beforeinput", "click"],62 onEvent: function(event, context, props) {63 var type = event.type,64 target = event.target;65 if (!props.disabled) {66 var currentTarget = context.getResponderNode();67 if (target === currentTarget && null !== currentTarget) {68 var nodeName = target.nodeName && target.nodeName.toLowerCase();69 if (70 ("select" === nodeName ||71 ("input" === nodeName && "file" === target.type)) &&72 "change" === type73 )74 dispatchBothChangeEvents(event, context, props, currentTarget);75 else {76 nodeName = target.nodeName && target.nodeName.toLowerCase();77 var type$jscomp$0 = target.type;78 ("textarea" !== nodeName &&79 ("input" !== nodeName ||80 (null != type$jscomp$0 &&81 !supportedInputTypes.has(type$jscomp$0)))) ||82 ("input" !== type && "change" !== type) ||83 !updateValueIfChanged(target)84 ? isCheckable(target) &&85 "click" === type &&86 updateValueIfChanged(target) &&87 dispatchBothChangeEvents(event, context, props, currentTarget)88 : dispatchBothChangeEvents(event, context, props, currentTarget);89 }90 }91 }92 }93});94module.exports = {95 InputResponder: InputResponder,96 useInput: function(props) {97 return React.unstable_useResponder(InputResponder, props);98 }...

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Using AI Code Generation

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1const { updateValueIfChanged } = require('playwright/​lib/​server/​dom.js');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.evaluate(async (selector, value) => {8 const element = document.querySelector(selector);9 await updateValueIfChanged(element, value);10 }, 'input', 'hello');11 await page.screenshot({ path: `example.png` });12 await browser.close();13})();14- [updateValueIfChanged](#updatevalueifchanged)15 - [Parameters](#parameters)16 - [Examples](#examples)17- [updateCheckedIfChanged](#updatecheckedifchanged)18 - [Parameters](#parameters-1)19 - [Examples](#examples-1)20- `element` **[ElementHandle](

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Using AI Code Generation

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1const { updateValueIfChanged } = require('playwright/​lib/​client/​elementHandler');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 const input = await page.$('input[name="q"]');8 await input.type('hello');9 await updateValueIfChanged(input, 'hello');10 await browser.close();11})();

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Using AI Code Generation

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1const { updateValueIfChanged } = require('playwright/​lib/​server/​frames');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.click('[aria-label="Search"]');8 await updateValueIfChanged(page, 'input[name="q"]', 'Hello World');9 await page.keyboard.press('Enter');10 await page.screenshot({ path: `example.png` });11 await browser.close();12})();13const { chromium } = require('playwright');14(async () => {15 const browser = await chromium.launch();16 const context = await browser.newContext();17 const page = await context.newPage();18 await page.click('[aria-label="Search"]');19 await page.fill('input[name="q"]', 'Hello World');20 await page.keyboard.press('Enter');21 await page.screenshot({ path: `example.png` });22 await browser.close();23})();24await updateValueIfChanged(page, 'input[name="q"]', 'Hello World');25const { chromium } = require('playwright');26(async () => {27 const browser = await chromium.launch();28 const context = await browser.newContext();29 const page = await context.newPage();30 await page.click('[aria-label="Search"]');31 await updateValueIfChanged(page, 'input[name="q"]', 'Hello World');32 await page.keyboard.press('Enter');33 await page.screenshot({ path: `example.png` });34 await browser.close();35})();

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Using AI Code Generation

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

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Using AI Code Generation

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1const { updateValueIfChanged } = require('playwright/​lib/​server/​frames');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 const element = await page.$('input[name="q"]');8 await updateValueIfChanged(element, 'foo');9 await browser.close();10})();11const { chromium } = require('playwright');12(async () => {13 const browser = await chromium.launch();14 const context = await browser.newContext();15 const page = await context.newPage();16 const element = await page.$('input[name="q"]');17 await element.updateValueIfChanged('foo');18 await browser.close();19})();

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Using AI Code Generation

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1const { updateValueIfChanged } = require('playwright/​lib/​client/​selectorEngine');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.click('input[name="q"]');8 await updateValueIfChanged(page, 'input[name="q"]', 'Hello World');9 await page.click('input[name="btnK"]');10 await page.waitForSelector('text="Hello World"');11 await browser.close();12})();13const { updateValueIfChanged } = require('playwright/​lib/​client/​selectorEngine');14const { chromium } = require('playwright');15(async () => {16 const browser = await chromium.launch();17 const context = await browser.newContext();18 const page = await context.newPage();19 await page.click('input[name="q"]');20 await updateValueIfChanged(page, 'input[name="q"]', 'Hello World');21 await page.click('input[name="btnK"]');22 await page.waitForSelector('text="Hello World"');23 await browser.close();24})();25const { updateValueIfChanged } = require('playwright/​lib/​client/​selectorEngine');26const { chromium } = require('playwright');27(async () => {28 const browser = await chromium.launch();29 const context = await browser.newContext();30 const page = await context.newPage();31 await page.click('input[name="q"]');32 await updateValueIfChanged(page, 'input[name="q"]', 'Hello World');33 await page.click('input[name="btnK"]');34 await page.waitForSelector('text="Hello World"');35 await browser.close();36})();37const { updateValueIfChanged } = require('playwright/​lib/​client/​selectorEngine');38const { chromium } = require('playwright');39(async () => {40 const browser = await chromium.launch();41 const context = await browser.newContext();

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Using AI Code Generation

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1const { Page } = require('playwright/​lib/​server/​page');2const { helper } = require('playwright/​lib/​helper');3const { assert } = require('chai');4Page.prototype.updateValueIfChanged = async function (element, value) {5 const result = await this._delegate.updateValueIfChanged({ element, value });6 assert.ok(result, 'updateValueIfChanged failed');7};8const { ElementHandle } = require('playwright/​lib/​server/​dom');9const { helper } = require('playwright/​lib/​helper');10const { assert } = require('chai');11ElementHandle.prototype.updateValueIfChanged = async function (value) {12 const result = await this._delegate.updateValueIfChanged({ value });13 assert.ok(result, 'updateValueIfChanged failed');14};15const { JSHandle } = require('playwright/​lib/​server/​dom');16const { helper } = require('playwright/​lib/​helper');17const { assert } = require('chai');18JSHandle.prototype.updateValueIfChanged = async function (value) {19 const result = await this._delegate.updateValueIfChanged({ value });20 assert.ok(result, 'updateValueIfChanged failed');21};22const { Frame } = require('playwright/​lib/​server/​frames');23const { helper } = require('playwright/​lib/​helper');24const { assert } = require('chai');25Frame.prototype.updateValueIfChanged = async function (element, value) {26 const result = await this._delegate.updateValueIfChanged({ element, value });27 assert.ok(result, 'updateValueIfChanged failed');28};29For any issues or questions, please contact me at [my email](mailto:

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StackOverFlow community discussions

Questions
Discussion

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

firefox browser does not start in playwright

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

How to run a list of test suites in a single file concurrently in jest?

Running Playwright in Azure Function

firefox browser does not start 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

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