Lightweight – 2.8kB gzip
Only includes standard mime types; all experimental and vendor-specific mimetypes removed.
Performant
All lookups are O(1) with minimal processing.
Comprehensive Dictionary
Generated from mime-db, which aggregates the IANA, NGINX, and Apache datasets.
Customizable
Exposes the mimes dictionary for easy additions or overrides.
Supports Native ESM and Deno
Ships with CommonJS and ESM support!
$ npm install --save mrmime
```js import { lookup, mimes } from 'mrmime';
// Get a MIME type // --- lookup('txt'); //=> "text/plain" lookup('.txt'); //=> "text/plain" lookup('a.txt'); //=> "text/plain"
// Unknown extension // --- lookup('.xyz'); //=> undefined
// Add extension to dictionary // --- mimes['xyz'] = 'hello/world'; lookup('xyz'); //=> "hello/world" ```
Returns: string or undefined
Type: string
The extension or filename to lookup.
Important: * Any
inputvalue is cast to string, lowercased, and trimmed. * If a filename or filepath is provided, only the extension will be used.
Running on Node v16.8.0
``` Load times: mrmime 0.963ms mime/lite 3.281ms mime 6.751ms
Benchmark :: plain ("ext") mime x 598,849 ops/sec ±0.28% (94 runs sampled) mime/lite x 536,643 ops/sec ±0.11% (97 runs sampled) mrmime x 835,885 ops/sec ±0.20% (97 runs sampled)
Benchmark :: leading (".ext") mime x 368,656 ops/sec ±0.19% (99 runs sampled) mime/lite x 368,318 ops/sec ±0.13% (97 runs sampled) mrmime x 533,643 ops/sec ±0.10% (96 runs sampled)
Benchmark :: filename ("file.ext") mime x 326,907 ops/sec ±0.17% (95 runs sampled) mime/lite x 327,479 ops/sec ±0.12% (98 runs sampled) mrmime x 512,823 ops/sec ±0.12% (99 runs sampled) ```
Of course, a thank-you to 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.
This would not be possible without the team behind mime-db, who have painstakingly maintained an amazing database for 7+ years.
Artwork created by mintinol, which I found here.
Finally, thanks to Tim Branyen for donating the package name :)
MIT © Luke Edwards