Code Mosh React 18 Beginners Fco Better -

const handleClick = async () => { // Before React 18, setCount would not batch with async code // Now, React 18 automatically batches updates setCount(count + 1); await fetch('https://example.com/api/data'); // State updates here will batch with the previous setCount };

const Counter = () => { const [count, setCount] = useState(0);

import React, { lazy, Suspense } from 'react'; import './App.css'; import Counter from './Counter'; code mosh react 18 beginners fco better

function App() { return ( <div className="App"> <header className="App-header"> <Counter /> <Suspense fallback={<div>Loading...</div>}> <LazyLoadedComponent /> </Suspense> </header> </div> ); }

Below is a simple React application that demonstrates some of React 18's features. This guide assumes you have a basic understanding of JavaScript and are using Node.js (14 or later) and npm. First, create a new React app using Create React App: const handleClick = async () =&gt; { //

const LazyLoadedComponent = lazy(() => import('./LazyLoadedComponent'));

const Counter = () => { const [count, setCount] = useState(0); Creating a Component Create a new file called Counter

const LazyLoadedComponent = () => { return <div>This component was lazy loaded!</div>; };

export default App; To see automatic batching in action, you can modify Counter.tsx to include a function that updates state and then uses fetch to make an API call:

npx create-react-app my-app --template typescript cd my-app 2.1. Creating a Component Create a new file called Counter.tsx in the src directory:

function App() { return ( <div className="App"> <header className="App-header"> <Counter /> <Suspense fallback={<div>Loading...</div>}> <LazyLoadedComponent /> </Suspense> </header> </div> ); }