Must a external js file contain a .js extension?

Question

Is it okay if I use <script type="text/javascript" src="http://example.com/file"></script>

without .js at the end of the source?

Answer 1

Yes, it's okay to omit the .js, as long as your server is configured to cope with that and will serve that URI with a 200 OK and Content-Type: text/javascript.