What is this script tag?

Question

I've never seen it used like this before:

<script src="{{ file.name_js }}"></script>

Is this better?

Answer 1

This is something from a templating engine, such as Smarty or similar.

Everything between the brackets {{ }} is handled server-side, likely so that the script files can be minified server-side easily and the file name be updated to the minified version, or something from a variable.

Answer 2

looks like somekind of a templating language Django has the same kind of tags for example.