01 / Technologies / Language

Detect JavaScript in any GitHub repo

JavaScript is the language of the web, running in every browser and on servers via Node.js, Deno and Bun.

Why show JavaScript on your README

Detected from .js/.jsx/.mjs/.cjs files, so mixed JS and TS repos show both languages.

How JavaScript is detected

Stack Fingerprint reads the repo's full file tree in one GitHub API call and flags JavaScript when it finds any of these:

  • File extensions: .js, .jsx, .mjs, .cjs

JavaScript README badge

A static badge you can paste anywhere in Markdown:

JavaScript badge

Markdown
![JavaScript](https://img.shields.io/badge/JavaScript-F7DF1E?style=for-the-badge&logo=javascript&logoColor=white)

Or let the repo describe itself

Static badges go stale the moment you swap a dependency. A Stack Fingerprint card is generated from the repo, so JavaScript (and everything around it) appears or disappears on its own:

Tech stack card for lodash/lodash
lodash/lodash · generated live from the repo
README.md
[![Stack Fingerprint](https://stackfingerprint.vercel.app/api/card?repo=OWNER/REPO)](https://stackfingerprint.vercel.app/?repo=OWNER/REPO)

Replace OWNER/REPO with your repository, or open the builder to pick a theme and layout.