JavaScript Compilers

A compiler converts JavaScript (or TypeScript) code into another version of JavaScript, which could be backwards compatible in current and older browsers or environments.

For example, we can use Private class features in JavaScript, but not all browsers support it yet. If we use Private class features in our code, we need to use a compiler to compile it to a version of JavaScript that a browser (or other environment, for example in a Serverless Function) can execute.

A compiler does not bundle code. It simply transforms it to another version, based on a certain configuration.

Popular compilers:

• Babel
• TypeScript

---

Backlinks

• Performance Patterns