What are the best practices for conditional rendering in React?

What are the best practices for conditional rendering in React?

When using conditional rendering in React, it's important to keep your code clean and readable. You can use ternary operators, logical && operators, or even separate functions to handle complex conditions.

Can you give me an example of using a ternary operator?

Sure! Here's a simple example:

const isLoggedIn = true;
return (
  <div>
    {isLoggedIn ? <h1>Welcome back!</h1> : <h1>Please log in.</h1>}
  </div>
);

What about using the && operator?

The && operator can be used to render components conditionally. For example:

const isAdmin = true;
return (
  <div>
    {isAdmin && <h1>Admin Dashboard</h1>}
  </div>
);

This will only render 'Admin Dashboard' if isAdmin is true.

Are there any performance considerations I should be aware of?

Yes, avoid unnecessary re-renders by using React.memo for functional components and shouldComponentUpdate for class components. Also, consider using lazy loading for components that are not immediately needed.