How to use getNativeBeforeInputChars method in Playwright Internal

Best JavaScript code snippet using playwright-internal

BeforeInputEventPlugin.js

Source: BeforeInputEventPlugin.js Github

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...127 }128 EventPropagators.accumulateTwoPhaseDispatches(event);129 return event;130}131function getNativeBeforeInputChars(topLevelType, nativeEvent) {132 switch (topLevelType) {133 case topLevelTypes.topCompositionEnd:134 return getDataFromCustomEvent(nativeEvent);135 case topLevelTypes.topKeyPress:136 var which = nativeEvent.which;137 if (which !== SPACEBAR_CODE) {138 return null;139 }140 hasSpaceKeypress = true;141 return SPACEBAR_CHAR;142 case topLevelTypes.topTextInput:143 var chars = nativeEvent.data;144 if (chars === SPACEBAR_CHAR && hasSpaceKeypress) {145 return null;146 }147 return chars;148 default:149 return null;150 }151}152function getFallbackBeforeInputChars(topLevelType, nativeEvent) {153 if (currentComposition) {154 if (topLevelType === topLevelTypes.topCompositionEnd || isFallbackCompositionEnd(topLevelType, nativeEvent)) {155 var chars = currentComposition.getData();156 FallbackCompositionState.release(currentComposition);157 currentComposition = null;158 return chars;159 }160 return null;161 }162 switch (topLevelType) {163 case topLevelTypes.topPaste:164 return null;165 case topLevelTypes.topKeyPress:166 if (nativeEvent.which && !isKeypressCommand(nativeEvent)) {167 return String.fromCharCode(nativeEvent.which);168 }169 return null;170 case topLevelTypes.topCompositionEnd:171 return useFallbackCompositionData ? null : nativeEvent.data;172 default:173 return null;174 }175}176function extractBeforeInputEvent(topLevelType, topLevelTarget, topLevelTargetID, nativeEvent) {177 var chars;178 if (canUseTextInputEvent) {179 chars = getNativeBeforeInputChars(topLevelType, nativeEvent);180 } else {181 chars = getFallbackBeforeInputChars(topLevelType, nativeEvent);182 }183 if (!chars) {184 return null;185 }186 var event = SyntheticInputEvent.getPooled(eventTypes.beforeInput, topLevelTargetID, nativeEvent);187 event.data = chars;188 EventPropagators.accumulateTwoPhaseDispatches(event);189 return event;190}191var BeforeInputEventPlugin = {192 eventTypes: eventTypes,193 extractEvents: function(topLevelType, topLevelTarget, topLevelTargetID, nativeEvent) {...

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Using AI Code Generation

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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.focus('input[name="q"]');7 await page.keyboard.type('hello');8 const chars = await page.evaluate(() => {9 return window.getNativeBeforeInputChars();10 });11 console.log(chars);12 await browser.close();13})();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.focus('input[name="q"]');20 await page.keyboard.type('hello');21 const chars = await page.evaluate(() => {22 return window.getNativeBeforeInputChars();23 });24 console.log(chars);25 await browser.close();26})();

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Using AI Code Generation

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1const { chromium } = require('playwright');2const fs = require('fs');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[type="search"]');8 await input.click();9 await input.press('Backspace');10 const result = await page.evaluate(async () => {11 const { getNativeBeforeInputChars } = window['playwright'];12 const input = document.querySelector('input[type="search"]');13 const event = new InputEvent('beforeinput', { data: 'a', inputType: 'insertText', dataTransfer: null });14 input.dispatchEvent(event);15 return getNativeBeforeInputChars(event);16 });17 fs.writeFileSync('./​result.txt', result);18 await browser.close();19})();

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Using AI Code Generation

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1const { chromium } = require('playwright');2const { getNativeBeforeInputChars } = require('playwright/​lib/​internal/​keyboard');3(async () => {4 const browser = await chromium.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 await page.click('#tsf > div:nth-child(2) > div > div.RNNXgb > div > div.a4bIc > input');8 await page.type('#tsf > div:nth-child(2) > div > div.RNNXgb > div > div.a4bIc > input', 'hello');9 const beforeInputChars = await getNativeBeforeInputChars(page);10 console.log(beforeInputChars);11 await browser.close();12})();

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Using AI Code Generation

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1const { getNativeBeforeInputChars } = require('playwright/​lib/​server/​input');2const { firefox } = require('playwright');3(async () => {4 const browser = await firefox.launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 await page.evaluate(() => {8 `;9 });10 const nativeString = await page.evaluate(getNativeBeforeInputChars, 'a');11 console.log(nativeString);12 await page.type('#input1', 'a');13 await page.type('#input2', 'a', { delay: 1000 });14 await page.type('#input3', 'a', { delay: 1000 });15 await page.type('#input4', 'a', { delay: 1000 });16 await browser.close();17})();

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Using AI Code Generation

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1const { getNativeBeforeInputChars } = require('playwright/​lib/​server/​frames');2const { chromium } = require('playwright');3(async () => {4 const browser = await chromium.launch({5 });6 const context = await browser.newContext();7 const page = await context.newPage();8 await page.click('input.gLFyf.gsfi');9 await page.keyboard.type('Hello World');10 await page.keyboard.down('Shift');11 await page.keyboard.press('KeyH');12 await page.keyboard.press('KeyE');13 await page.keyboard.press('KeyL');14 await page.keyboard.press('KeyL');15 await page.keyboard.press('KeyO');16 await page.keyboard.up('Shift');17 await page.keyboard.press('KeyW');18 await page.keyboard.press('KeyO');19 await page.keyboard.press('KeyR');20 await page.keyboard.press('KeyL');21 await page.keyboard.press('KeyD');22 await page.keyboard.press('Enter');23 await page.waitForTimeout(1000);24 const input = await page.$('input.gLFyf.gsfi');25 const inputHandle = await input.evaluateHandle((node) => node);26 const nativeInputValue = await getNativeBeforeInputChars(inputHandle);27 console.log(nativeInputValue);28 await browser.close();29})();

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Using AI Code Generation

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1const { getNativeBeforeInputChars } = require('@playwright/​test/​lib/​server/​supplements/​recorder/​recorderSupplement.js');2const { chromium } = require('playwright');3(async () => {4 const browser = await chromium.launch();5 const page = await browser.newPage();6 const input = await page.$('input[name="q"]');7 await input.focus();8 await input.press('a');9 const chars = await getNativeBeforeInputChars(page);10 console.log(chars);11 await browser.close();12})();

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Using AI Code Generation

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1const { chromium } = require('playwright-chromium');2(async () => {3 const browser = await chromium.launch({ headless: false });4 const page = await browser.newPage();5 await page.waitForSelector('iframe');6 const frame = page.frames()[1];7 await frame.waitForSelector('input');8 await frame.focus('input');9 await frame.type('input', 'a');10 const inputEvent = await page.evaluate(() => {11 return getNativeBeforeInputChars();12 });13 console.log(inputEvent);14 await browser.close();15})();

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Using AI Code Generation

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1const { getNativeBeforeInputChars } = require('playwright');2console.log(getNativeBeforeInputChars(0x1f1e6, 0x1f1e8));3const { getNativeBeforeInputChars } = require('playwright');4console.log(getNativeBeforeInputChars(0x1f1e6, 0x1f1e8));5const { getNativeBeforeInputChars } = require('playwright');6console.log(getNativeBeforeInputChars(0x1f1e6, 0x1f1e8));7const { getNativeBeforeInputChars } = require('playwright');8console.log(getNativeBeforeInputChars(0x1f1e6, 0x1f1e8));9const { getNativeBeforeInputChars } = require('playwright');10console.log(getNativeBeforeInputChars(0x1f1e6, 0x1f1e8));11const { getNativeBeforeInputChars } = require('playwright');12console.log(getNativeBeforeInputChars(0x1f1e6, 0x1f1e8));13const { getNativeBeforeInputChars } = require('playwright');14console.log(getNativeBeforeInputChars(0x1f1e6, 0x1f1e8));15const { getNativeBeforeInputChars } = require('playwright');16console.log(getNativeBeforeInputChars(0x1f1e6, 0x1f1e8));17const { getNativeBeforeInputChars } =

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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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