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<div align="center">
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<img src="logo.png" alt="mrmime" width="320" />
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</div>
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<div align="center">
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<a href="https://npmjs.org/package/mrmime">
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<img src="https://badgen.now.sh/npm/v/mrmime" alt="version" />
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</a>
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<a href="https://github.com/lukeed/mrmime/actions">
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<img src="https://github.com/lukeed/mrmime/workflows/CI/badge.svg" alt="CI" />
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</a>
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<a href="https://npmjs.org/package/mrmime">
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<img src="https://badgen.now.sh/npm/dm/mrmime" alt="downloads" />
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</a>
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<a href="https://packagephobia.now.sh/result?p=mrmime">
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<img src="https://packagephobia.now.sh/badge?p=mrmime" alt="install size" />
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</a>
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</div>
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<div align="center">
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A tiny (2.8kB) and fast utility for getting a MIME type from an extension or filename
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</div>
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## Features
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* Lightweight – 2.8kB gzip<br>
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_Only includes standard mime types; all experimental and vendor-specific mimetypes removed._
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* [Performant](#benchmarks)<br>
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_All lookups are O(1) with minimal processing._
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* Comprehensive Dictionary<br>
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_Generated from [`mime-db`](https://github.com/jshttp/mime-db), which aggregates the IANA, NGINX, and Apache datasets._
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* Customizable<br>
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_Exposes the `mimes` dictionary for easy additions or overrides._
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* Supports Native ESM and [Deno](https://deno.land/x/mrmime)<br>
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_Ships with CommonJS and ESM support!_
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## Install
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```
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$ npm install --save mrmime
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```
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## Usage
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```js
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import { lookup, mimes } from 'mrmime';
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// Get a MIME type
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// ---
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lookup('txt'); //=> "text/plain"
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lookup('.txt'); //=> "text/plain"
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lookup('a.txt'); //=> "text/plain"
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// Unknown extension
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// ---
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lookup('.xyz'); //=> undefined
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// Add extension to dictionary
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// ---
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mimes['xyz'] = 'hello/world';
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lookup('xyz'); //=> "hello/world"
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```
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## API
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### lookup(input)
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Returns: `string` or `undefined`
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#### input
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Type: `string`
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The extension or filename to lookup.
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> **Important:**
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> * Any `input` value is cast to string, lowercased, and trimmed.
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> * If a filename or filepath is provided, only the extension will be used.
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## Benchmarks
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> Running on Node v16.8.0
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```
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Load times:
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mrmime 0.963ms
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mime/lite 3.281ms
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mime 6.751ms
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Benchmark :: plain ("ext")
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mime x 598,849 ops/sec ±0.28% (94 runs sampled)
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mime/lite x 536,643 ops/sec ±0.11% (97 runs sampled)
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mrmime x 835,885 ops/sec ±0.20% (97 runs sampled)
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Benchmark :: leading (".ext")
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mime x 368,656 ops/sec ±0.19% (99 runs sampled)
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mime/lite x 368,318 ops/sec ±0.13% (97 runs sampled)
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mrmime x 533,643 ops/sec ±0.10% (96 runs sampled)
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Benchmark :: filename ("file.ext")
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mime x 326,907 ops/sec ±0.17% (95 runs sampled)
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mime/lite x 327,479 ops/sec ±0.12% (98 runs sampled)
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mrmime x 512,823 ops/sec ±0.12% (99 runs sampled)
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```
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## Credits
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Of course, a thank-you to [`mime`](https://github.com/broofa/mime) serving the community all these years & for being a all-encompassing MIME type library. I've only ever needed lookup/`getType` functionality – and now ESM support – so `mrmime` can only ever support 1/3 of what `mime` offers, at best.
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This would not be possible without the team behind [`mime-db`](https://github.com/jshttp/mime-db), who have painstakingly maintained an amazing database for 7+ years.
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Artwork created by [mintinol](https://www.deviantart.com/mintinol), which I found [here](https://www.deviantart.com/mintinol/art/Mr-Mime-373927920).
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Finally, thanks to [Tim Branyen](https://github.com/tbranyen) for donating the package name :)
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## License
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MIT © [Luke Edwards](https://lukeed.com)
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