php - What is an appropriate content-type header for JavaScript files?

Question

I am delivering a JS response from a PHP file. When setting the Content-Type header which value should I use, application/javascript or text/javascript?

What’s the difference between the two?

Answer 1

According to the IANA Registered MIME media type list, JS has two registered MIME types; the obsolete text/javascript and the now official application/javascript.

Thus, use application/javascript.