💻 programming-languages

File extensions for programming languages.

It's just a JSON file, so you can use it in any environment. Sourced from GitHub's Linguist project (defines all 700+ languages known to GitHub). Data is updated via script and released via new package version.

⚡ Installation

From your project root:

npm install @adamlui/programming-languages

🔌 Usage

ES Modules (ESM):

import programmingLangs from '@adamlui/programming-languages'

pyLangData = programmingLangs.Python

console.log(pyLangData.extensions) // => [ '.cgi', '.fcgi', '.gyp', ... ]

CommonJS (CJS):

const programmingLangs = require('@adamlui/programming-languages')

pyLangData = programmingLangs.Python

console.log(pyLangData.extensions) // => [ '.cgi', '.fcgi', '.gyp', ... ]

💻 Examples

Get language(s) from an extension:

function getLang(fileExt) {
    const langMatches = Object.entries(programmingLangs)
        .filter(([_, data]) => data.extensions.includes(fileExt))
        .map(([lang]) => lang)
    return langMatches.length == 1 ? langMatches[0] : langMatches
}

console.log(getLang('.al')) // => [ 'AL', 'Perl' ]

Get language(s) from a file path:

function getLangFromPath(filepath) {
    const fileExt = filepath.slice(filepath.lastIndexOf('.'))
    const langMatches = Object.entries(programmingLangs)
        .filter(([_, data]) => data.extensions.includes(fileExt))
        .map(([lang]) => lang)
    return langMatches.length == 1 ? langMatches[0] : langMatches
}

console.log(getLangFromPath('main.rs')) // => [ 'RenderScript', 'Rust' ]
console.log(getLangFromPath('script.kt'))  // => Kotlin
console.log(getLangFromPath('data.avsc'))  // => [] (use data-languages pkg)

MIT License

Copyright © 2026 Adam Lui

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