# 💻 computer-languages
> ### _File extensions for computer languages._
It's just a [JSON file](https://cdn.jsdelivr.net/npm/computer-languages@1.0.0/dist/computer-languages.json), so you can use it in any environment. Sourced from GitHub's [Linguist](https://github.com/github-linguist/linguist) project (defines all 700+ languages known to GitHub). Data is updated via script and released via new package version.
## âš¡ Installation
From your project root:
```bash
npm install computer-languages
```
## 🔌 Usage
#### 
ES Modules (ESM):
```js
import computerLangs from 'computer-languages'
pyLangData = computerLangs.Python
console.log(pyLangData.type) // => programming
console.log(pyLangData.extensions) // => [ '.cgi', '.fcgi', '.gyp', ... ]
```
#### 
CommonJS (CJS):
```js
const computerLangs = require('computer-languages')
console.log(pyLangData.type) // => programming
console.log(pyLangData.extensions) // => [ '.cgi', '.fcgi', '.gyp', ... ]
```
## 💻 Examples
Get extension(s) for a language:
```js
jsExts = computerLangs.JavaScript.extensions
console.log(jsExts) // => [ '._js', '.bones', '.cjs', '.es', ... ]
```
Get language(s) from an extension:
```js
function getLang(fileExt) {
const langMatches = Object.entries(computerLangs)
.filter(([_, data]) => data.extensions.includes(fileExt))
.map(([lang]) => lang)
return langMatches.length == 1 ? langMatches[0] : langMatches
}
console.log(getLang('.rs')) // => [ 'RenderScript', 'Rust', 'XML' ]
```
Filter by language type:
```js
const markupLangs = Object.keys(computerLangs)
.filter(lang => computerLangs[lang].type == 'markup')
console.log(markupLangs) // => [ 'Antlers', 'API Blueprint', 'Astro', 'BibTeX', ... ]
console.log(`${markupLangs.length} markup languages`) // -> 69 markup languages
```
## MIT License
Copyright © 2026 [Adam Lui](https://github.com/adamlui)
## 📦 Related
computer-languages (Python)
> [
][computer-langs-py-install]
> [Install][computer-langs-py-install] /
> [
][computer-langs-py-readme]
> [Readme][computer-langs-py-readme] /
> 🔌 [API usage][computer-langs-py-api-usage] /
> [
][computer-langs-py-discuss]
> [Discuss][computer-langs-py-discuss]
[computer-langs-py-install]: https://github.com/adamlui/python-utils/tree/main/computer-languages/#installation
[computer-langs-py-readme]: https://github.com/adamlui/python-utils/tree/main/computer-languages/#readme
[computer-langs-py-api-usage]: https://github.com/adamlui/python-utils/tree/main/computer-languages/#usage
[computer-langs-py-discuss]: https://github.com/adamlui/python-utils/discussions
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[js-utils]: https://github.com/adamlui/js-utils/#readme
