text/*

text/javascript

File extensions: .js, .mjs

JavaScript source — the modern canonical media type for JS files.

What is text/javascript?

text/javascript is the canonical media type recommended by the HTML Living Standard for JavaScript files. It replaces application/javascript in modern usage, though both still work in every browser.

Typical usage

External <script src> files, ES modules, service workers.

Common gotchas

ES modules require the correct MIME type. Serving a .mjs file as text/plain or application/octet-stream causes the browser to reject the module load.

HTTP header example

Response header

Content-Type: text/javascript; charset=utf-8

Reference

HTML Living Standard

Related MIME types

application/javascript

JavaScript

text/plain

Plain text

text/html

HTML

text/css

CSS

text/csv

CSV

text/xml

XML (text form)