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import "./App.css"; | |
import React, { useContext } from 'react'; | |
import Switch from "./Switch"; | |
import { ThemeProvider, useTheme } from './ThemeContext'; // Import from ThemeContext.js | |
const Title = ({ children }) => { | |
const { theme } = useTheme(); | |
return ( | |
<h2 | |
style={{ |
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import React, { useContext } from 'react'; | |
import { AuthContext } from './AuthContext'; | |
const UserProfile = () => { | |
const { user, logout } = useContext(AuthContext); | |
return ( | |
<div> | |
<h2>Welcome, {user ? user.name : 'Guest'}</h2> | |
{user && <button onClick={logout}>Logout</button>} |
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/** | |
* Gets keyboard-focusable elements within a specified element | |
* @param {HTMLElement} [element=document] element | |
* @returns {Array} | |
*/ | |
function getKeyboardFocusableElements(element = document) { | |
return [ | |
...element.querySelectorAll( | |
'a[href], button, input, textarea, select, details,[tabindex]:not([tabindex="-1"])' | |
), |
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function asyncFunction(x) { | |
return new Promise(function (resolve, reject) { | |
if(typeof x === 'number' && !isNaN(x)){ | |
resolve( x * x) | |
} else { | |
reject(new Error('It\'s not a number')) | |
} | |
}) | |
} |
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(async function () { | |
const a = await asyncFunction(2) | |
const b = await asyncFunction(a) | |
const c = await asyncFunction(b) | |
const d = await asyncFunction(c) | |
console.log(d); | |
})() | |
function asyncFunction(x, fn){ | |
return new Promise(function (resolve, reject) { |