What is MIME type "application/ecmascript"?

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

The MIME type application/ecmascript signals that a file contains script code that follows the ECMAScript standard. It designates programs written in modern JavaScript and related languages.

This type tells systems that the file includes code with features defined in the ECMA‑262 standard, which includes fundamentals like variables, control structures, and more. It is key for dynamic behavior in web pages and other scripting environments.

Files using this MIME type include scripts such as JS, ES, AS, and ECMA. (These links provide more about the file extensions.)

• Script Execution: The MIME type informs browsers and environments to treat the file as executable code.
• Standard Compliance: It adheres to a mature standard defined by ECMA‑262.
• Web Integration: Essential for embedding dynamic scripts in webpages.
• Alternative Usage: Serves as a counterpart to other MIME types, like text/javascript.

Developers use this type to ensure proper handling of scripts across different platforms. For more details, check out MDN Web Docs.

Associated file extensions

.js, .es, .as, .ecma

Usage Examples

HTTP Header

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

    Content-Type: application/ecmascript
  

HTML

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

    <a href="file.dat" type="application/ecmascript">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', 'application/ecmascript');
      res.end('Content here');
    }).listen(3000);
  

Associated file extensions

.js, .es, .as, .ecma