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Commit 340eb16

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‎README.md

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# React-Coding-Round-Interview-Questions
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[Edit on StackBlitz ⚡️](https://stackblitz.com/edit/stackblitz-starters-dfjd4q)

‎package.json

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{
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"name": "stackblitz-starters-dfjd4q",
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"version": "0.0.0",
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"private": true,
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"dependencies": {
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"react": "18.2.0",
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"react-dom": "18.2.0"
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},
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"scripts": {
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"start": "react-scripts start",
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"build": "react-scripts build",
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"test": "react-scripts test --env=jsdom",
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"eject": "react-scripts eject"
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},
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"devDependencies": {
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"react-scripts": "latest"
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}
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}

‎public/index.html

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<div id="root"></div>

‎src/App.js

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import React, { useState } from 'react';
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import './style.css';
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const numArr = [1, 2, 3];
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const res = numArr.map((el) => el * 2);
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console.log(numArr, res); // [1, 2, 3] [2, 4, 6]
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const res2 = numArr.forEach((el, i, arr) => (arr[i] = el * 2));
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console.log(numArr, res2); // [2, 4, 6] undefined
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const obj = {
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name: 'Ram',
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age: 21,
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printInfo: function () {
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console.log(`My name is ${this.name}, and my age is ${this.age}`);
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},
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};
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obj.printInfo(); // My name is Ram, and my age is 21
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export default function App() {
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const ERROR_MSG = 'Age is must be greater than 18';
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const [text, setText] = useState('');
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const [isError, setError] = useState(false);
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const handleTextInput = (e) => {
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setError(false);
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console.log(e.target.value);
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setText(e.target.value);
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if (e.target.value < 18) {
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setError(true);
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}
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};
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return (
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<div>
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<input value={text} onChange={handleTextInput} />
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<br />
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{isError ? ERROR_MSG : null}
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</div>
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);
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}

‎src/index.js

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import React, { StrictMode } from 'react';
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import { createRoot } from 'react-dom/client';
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import App from './App';
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const rootElement = document.getElementById('root');
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const root = createRoot(rootElement);
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root.render(
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<StrictMode>
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<App />
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</StrictMode>
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);

‎src/style.css

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h1,
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p {
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font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
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Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
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}

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AltStyle によって変換されたページ (->オリジナル) /