Security News
Highlights from the 2024 Rails Community Survey
A record 2,709 developers participated in the 2024 Ruby on Rails Community Survey, revealing key tools, practices, and trends shaping the Rails ecosystem.
mime-types
Advanced tools
The mime-types npm package is a utility for resolving file extensions to MIME types and vice versa. It is based on the mime-db dataset, which is a comprehensive set of MIME type definitions.
Lookup MIME type for a file extension
This feature allows you to find the MIME type for a given file extension. If the extension has a MIME type in the database, it will return it as a string; otherwise, it will return false.
const mime = require('mime-types');
const mimeType = mime.lookup('json'); // 'application/json'
Determine the default extension for a MIME type
This feature enables you to find the default file extension for a given MIME type. If the MIME type has an associated extension, it will return it as a string; otherwise, it will return false.
const mime = require('mime-types');
const extension = mime.extension('application/json'); // 'json'
Lookup charset for a MIME type
This feature allows you to find the default charset for a given MIME type, which can be useful when setting the 'Content-Type' header in HTTP responses.
const mime = require('mime-types');
const charset = mime.charset('text/markdown'); // 'UTF-8'
Content-Type parsing
This feature is used to build a full Content-Type header given a MIME type or extension. It will also append the charset parameter when appropriate.
const mime = require('mime-types');
const contentType = mime.contentType('markdown'); // 'text/markdown; charset=utf-8'
The 'mime' package is similar to 'mime-types' and provides MIME type lookup and extension lookup. It differs in that it allows for custom MIME type definitions and has a slightly different API.
The 'file-type' package is used to detect the file type and MIME type of a Buffer/Uint8Array/ArrayBuffer. Unlike 'mime-types', it does not rely on file extensions and can detect the type of binary content.
The ultimate javascript content-type utility.
Similar to node-mime, except:
mime-types
simply returns false
,
so do var type = mime.lookup('unrecognized') || 'application/octet-stream'
.new Mime()
business, so you could do var lookup = require('mime-types').lookup
..define()
functionalityOtherwise, the API is compatible.
$ npm install mime-types
All mime types are based on mime-db, so open a PR there if you'd like to add mime types.
var mime = require('mime-types')
All functions return false
if input is invalid or not found.
Lookup the content-type associated with a file.
mime.lookup('json') // 'application/json'
mime.lookup('.md') // 'text/x-markdown'
mime.lookup('file.html') // 'text/html'
mime.lookup('folder/file.js') // 'application/javascript'
mime.lookup('cats') // false
Create a full content-type header given a content-type or extension.
mime.contentType('markdown') // 'text/x-markdown; charset=utf-8'
mime.contentType('file.json') // 'application/json; charset=utf-8'
Get the default extension for a content-type.
mime.extension('application/octet-stream') // 'bin'
Lookup the implied default charset of a content-type.
mime.charset('text/x-markdown') // 'UTF-8'
A map of content-types by extension.
A map of extensions by content-type.
FAQs
The ultimate javascript content-type utility.
The npm package mime-types receives a total of 49,790,845 weekly downloads. As such, mime-types popularity was classified as popular.
We found that mime-types demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
A record 2,709 developers participated in the 2024 Ruby on Rails Community Survey, revealing key tools, practices, and trends shaping the Rails ecosystem.
Security News
In 2023, data breaches surged 78% from zero-day and supply chain attacks, but developers are still buried under alerts that are unable to prevent these threats.
Security News
Solo open source maintainers face burnout and security challenges, with 60% unpaid and 60% considering quitting.