Why put JavaScript in head

Question

If it is perfectly acceptable to put JavaScript right before what is a good reason to keep it in the ?

Based on t

Answer 1

The only reason to put JS in the head is for scripts that modify how the browser actually renders the page. For example, Modernizr.js is loaded in the head so that it can do things like add support for HTML5 elements and manipulate classes on the tag before the page begins to render.

Otherwise, your JS should be going in at the bottom of the page.