Code Mosh React 18 Beginners Fco Better

Here's a simple example of a functional component in React 18. Let's create a counter:

import React,  useState  from 'react';
function Counter() 
  const [count, setCount] = useState(0);
return (
    <div>
      <p>You clicked count times</p>
      <button onClick=() => setCount(count + 1)>
        Click me
      </button>
    </div>
  );
export default Counter;

Use startTransition for non-urgent updates (e.g., filtering large lists) so urgent updates (typing) remain snappy. code mosh react 18 beginners fco better

import  startTransition  from 'react';
function Search() 
  const [query, setQuery] = useState('');
  const [results, setResults] = useState([]);
function onChange(e) 
    const value = e.target.value;
    setQuery(value); // urgent
    startTransition(() => 
      // non-urgent: update heavy UI
      setResults(searchLargeDataset(value));
    );

After your first project, learn:

The "Code Mosh React 18 for Beginners" course is structured across several sections. Here is how it aligns with the FCO better philosophy: Here's a simple example of a functional component

Replace old ReactDOM.render with the new createRoot: Use startTransition for non-urgent updates (e

import  createRoot  from 'react-dom/client';
import App from './App';
const container = document.getElementById('root');
const root = createRoot(container);
root.render(<App />);