mrmime

Features

* 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!_

Install

``
$ npm install --save mrmime
`

Usage

`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"
`

API

$3

#### input
Type: string

The extension or filename to lookup.

> Important:
> * Any input value is cast to string, lowercased, and trimmed.
> * If a filename or filepath is provided, only the extension will be used.

Benchmarks

> 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)
`

Credits

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 :)

License

MIT © Luke Edwards