mime-types

The ultimate javascript content-type utility.

Forked from mime-types

• Written in typescript

• Created MimeTypes Class

• Changed function names

  | old | new | | ----------- | --------------------------------- | | lookup | getMime | | contentType | getContentType | | extension | getExtension | | charset | getCharset |

• New Function

  • getMimes

Adding Types

All mime types are based on mime-db, so open a PR there if you'd like to add mime types.

API

• Installation
• Getting Started
  • CJS
  • ESM
  • Others
• Properties
  • types
  • typeSets
  • extensions
• Methods
  • getMime
  • getMimes
  • getContentType
  • getExtension
  • getCharset

Getting Started

Installation

$ npm i @whykhamist/mime-types

or

$ yarn add @whykhamist/mime-types

CJS

const mime = require("@whykhamist/mime-types").default;
mime.getMime(...)

OR

// const MimeTypes = require("@whykhamist/mime-types").MimeTypes;
// const MimeDb = require("@whykhamist/mime-types").MimeDb;
const { MimeTypes, MimeDb } = require("@whykhamist/mime-types");
const mime = new MimeTypes(MimeDb);
mime.getMime(...)

OR

const { types, extensions, typeSets, getMime, getMimes, getContentType, getExtension, getCharset } = require("@whykhamist/mime-types");

ESM

import mime from "@whykhamist/mime-types";
mime.getMime(...)

OR

import { MimeTypes, MimeDb } from "@whykhamist/mime-types";
const mime = new MimeTypes(MimeDb);
mime.getMime(...)

OR

const { types, extensions, typeSets, getMime, getMimes, getContentType, getExtension, getCharset } from "@whykhamist/mime-types";

Others

import db from "mime-db/db.json";
import { MimeTypes } from "@whykhamist/mime-types";
import { MimeDatabase } from "mime-db";

const mime = new MimeTypes(db as MimeDatabase);

extname

By default, the class uses regex to extract the file extension from a path string. If you want to use other function for the extraction (ex. Node.js path.extname), then create a new MimeTypes instance and add the function as a second paramenter

import { extname } from "path";
const mime = new MimeTypes(db, extname);

Make sure that the function takes a string (path) and returns the file extension. Must return any falsy value if no extension could be identified.

Regex used

/^.+\.([^.]+)$/

Properties

types

A map of content-types by extension.

const type = types["mp3"];
// "audio/mpeg"

typeSets

A map of array of content types by extension.

const types = typeSets["mp3"];
// [ 'audio/mp3', 'audio/mpeg' ]

extensions

A map of extensions by content-type.

const exts = extensions["text/x-c"];
// [ "c", "cc", "cxx", "cpp", "h", "hh", "dic" ]

Methods

All functions return false if input is invalid or not found.

getMime

Lookup the content-type associated with a file.

getMime("json"); // 'application/json'
getMime(".md"); // 'text/markdown'
getMime("file.html"); // 'text/html'
getMime("folder/file.js"); // 'application/javascript'
getMime("folder/.htaccess"); // false

getMime("cats"); // false

getMimes

Find all content-types that are associated with a file.

getMimes("mp3"); // [ "audio/mpeg", "audio/mp3" ]
getMimes("path/to/file.rtf"); // [ "application/rtf", "text/rtf" ]
getMimes("c:\\path\\to\\file.bmp"); // [ "image/x-ms-bmp", "image/bmp", ]

getContentType

Create a full content-type header given a content-type or extension. When given an extension, mime.lookup is used to get the matching content-type, otherwise the given content-type is used. Then if the content-type does not already have a charset parameter, mime.charset is used to get the default charset and add to the returned content-type.

getContentType("markdown"); // 'text/x-markdown; charset=utf-8'
getContentType("file.json"); // 'application/json; charset=utf-8'
getContentType("text/html"); // 'text/html; charset=utf-8'
getContentType("text/html; charset=iso-8859-1"); // 'text/html; charset=iso-8859-1'

// from a full path
getContentType(path.extname("/path/to/file.json")); // 'application/json; charset=utf-8'

getExtension

Get the default extension for a content-type.

getExtension("application/octet-stream"); // 'bin'

getCharset

Lookup the implied default charset of a content-type.

getCharset("text/markdown"); // 'UTF-8'

License

MIT