What is MIME type "text/coffeescript"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

text/coffeescript is a MIME type that signals a file contains CoffeeScript code.
CoffeeScript is a language that compiles to JavaScript, offering a more concise and readable syntax.
When a server sends a file with this MIME type, software tools know to treat it as plain text meant for further processing or compilation.
A typical file using this MIME type is named using the COFFEE extension.
It is practical in development environments where build tools and transpilers automatically convert CoffeeScript into JavaScript.

Development: Used by developers to write and organize source code that will eventually run as JavaScript.
Tooling Integration: Supports syntax highlighting and error checking in code editors.
Build Processes: Facilitates automated compilation in web development workflows.

For a broader context on how MIME types work, refer to the guide on MDN Web Docs.

Associated file extensions

.coffee

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:


    Content-Type: text/coffeescript

HTML

In HTML, you can specify the MIME type in various elements:


    <a href="file.dat" type="text/coffeescript">Download file</a>

Server-side (Node.js)

Setting the Content-Type header in Node.js:


    const http = require('http');    
    
    http.createServer((req, res) => {    
      res.setHeader('Content-Type', 'text/coffeescript');    
      res.end('Content here');    
    }).listen(3000);

Associated file extensions

.coffee

FAQs

Can web browsers execute text/coffeescript files directly?

No, most modern web browsers cannot execute text/coffeescript directly without a transpiler. While older libraries allowed in-browser compilation, best practice involves compiling .coffee files into standard application/javascript before serving them to users. This ensures compatibility and better performance.

What is the correct MIME type for CoffeeScript files?

The generally accepted MIME type is text/coffeescript. While you might encounter non-standard variations like text/x-coffeescript or application/vnd.coffeescript in older systems, modern tools and editors prefer text/coffeescript to correctly identify the content as readable source code.

How do I configure Apache to serve .coffee files?

You can enable support by adding the AddType directive to your .htaccess file or main configuration. simply add the line AddType text/coffeescript .coffee to ensure the server sends the correct header for files with the .coffee extension.

How do I add CoffeeScript support to Nginx?

Update your mime.types file, which is usually located in /etc/nginx/. Add the entry text/coffeescript coffee; inside the types block, then reload Nginx to apply the changes so it correctly serves files with the .coffee extension.

Why is my browser downloading the .coffee file instead of running it?

This happens because the browser does not recognize text/coffeescript as an executable script type. Browsers treat unknown text types as downloadable content; to fix this, you should compile the code to JavaScript and link to the resulting .js file instead.

Is text/coffeescript safer than JavaScript?

Not inherently; text/coffeescript is simply source code that compiles into JavaScript, so it carries the same security considerations (like XSS risks) once compiled. However, because it requires a compilation step, it is less likely to be executed accidentally if a server is misconfigured.

What is the difference between text/coffeescript and application/javascript?

text/coffeescript represents the source code written in the CoffeeScript language, which features a simplified syntax. application/javascript represents the standard ECMAScript language that browsers actually run. You can learn more about the standard JavaScript type at application/javascript.

General FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why are multiple MIME types listed for one extension?

Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.