JavaScript .js file content type default is text/javascript but could be application/javascript

[Nicco Kunzmann]

Replication: serve a static .js file from a directory.

$ cat app.py
from flask import Flask, send_from_directory

app = Flask(__name__)

@app.route("/static/<path:path>")
def route_static(path):
    """/static/"""
    return send_from_directory("static", path)

if __name__ == "__main__":
    app.run(debug=True)

cat static/x.js 
/*example*/

The behavior I get is

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

I would expect

Content-Type
	application/javascript; charset=utf-8

See https://stackoverflow.com/a/189877/1320237

---

Environment:

• Python version: 3.11.6
• Flask version: 3.0.0

$ pip list
Package      Version
------------ -------
blinker      1.7.0
click        8.1.7
Flask        3.0.0
itsdangerous 2.1.2
Jinja2       3.1.2
MarkupSafe   2.1.3
pip          23.2
setuptools   68.2.2
Werkzeug     3.0.1
wheel        0.41.2

[David Lord]

You'll need to take that up with Python, we're using their mimetypes.guess_type function.