Contents of React Interview Questions

Comprehensive collection of React interview questions and answers covering hooks, components, state management, and best practices.

How to Write Comments in JSX (React)

In React, JSX allows you to write HTML-like syntax inside JavaScript. However, writing comments inside JSX is a little different compared to regular JavaScript.

Commenting Inside JSX Elements

When writing comments inside JSX (within the return statement), you must wrap your comment with {} and use the standard JavaScript comment syntax /* comment */ inside it.

Example:

function ExampleComponent() { return ( <div> {/* This is a comment inside JSX */} <h1>Hello, World!</h1> </div> ); }

✅ Important points:

  • Curly braces {} tell JSX to treat what's inside as JavaScript.
  • Inside the braces, you use /* */ for multiline-style comments.

Commenting Outside JSX

When you're outside the JSX (in the JavaScript part of your code), you use normal JavaScript comments without any extra syntax.

Example:

// This is a normal JavaScript comment function ExampleComponent() { return ( <div> <h1>Hello, again!</h1> </div> ); }

Quick Tips

  • Never use // comments directly inside JSX — it will cause an error.
  • Always use { /* your comment */ } inside JSX blocks.