@jlaitio

Developer

Stack Overflow contributor focused on React.js, serverless, AWS Lambda, and JavaScript. Reputation: 1,958. Top tags include reactjs (99 score).

https://stackoverflow.com/users/3265448/jlaitio

Programming React .js vs .jsx: Differences, Usage & Best Practices

Understand the key differences between .js and .jsx files in React. JSX works in both, but learn when to prefer .jsx for components, .js for utils, and how ESLint, Emmet, and bundlers enhance workflow with proper extensions.

#eslint
#javascript
#jsx
#react
#vite

6 answers• 1 view

02/23/2026, 05:40 PM