.js vs. .jsx: Should You Write Your React Code in .jsx?

When working with React, one of the decisions you'll face is whether to write your React components in .js or .jsx files. This choice can impact your project's clarity and maintainability. In this blog post, we'll explore the differences between .js and .jsx files and help you decide which is right for you.

What Are .js and .jsx Files?

.js Files

1. Definition: .js files are the standard extension for JavaScript files.
2. Usage: You can write React code, including JSX syntax, in .js files. However, this requires proper configuration of your build tools to handle JSX.
3. Configuration: Make sure your build system (e.g., Babel) is set up to transpile JSX code into standard JavaScript.

.jsx Files

1. Definition: .jsx is a convention that indicates the file contains JSX syntax.
2. Usage: Using .jsx makes it explicit that the file includes JSX, which can improve readability and understanding of your code.
3. Configuration: .jsx files also require appropriate build tool configurations, similar to .js files, to transpile JSX.

Pros and Cons of Using .jsx

Pros

1. Clarity: By using .jsx, you clearly indicate that the file contains JSX, which can make your codebase easier to navigate and understand.
2. Convention: Many teams and projects use .jsx to follow established conventions, making it easier for new developers to get up to speed.

Cons

1. Additional Extension: You’ll need to ensure your development tools (like ESLint, Prettier) are configured to handle .jsx files.
2. Inconsistency: If your project or team uses .js for everything, introducing .jsx might create inconsistency.

Making Your Decision

Whether to use .js or .jsx comes down to personal or team preference and the conventions of your project. If clarity and following conventions are important to you, .jsx might be the way to go. On the other hand, if you prefer simplicity and consistency, sticking with .js should work just fine as long as your build tools are properly configured.

In the end, both file extensions serve the same purpose, and with the right configuration, you can use either without issues. Choose the one that best fits your project’s needs and your team’s workflow.