Javascript Include Tag Best Practice in a Rails Application

Question

Say I need to call a javascript file in the of an ERb template. My instinct is to do the usual:

<%= javascript_incl         


        

Answer 1

I would suggest not to add javascript in the header as it causes to load the page slower. Rather load the js at the bottom of the page, which is faster. http://developer.yahoo.com/performance/rules.html#js_bottom

 ....
  <%= yield(:js) -%>

And send it there from a view:

<%- content_for(:js) do -%>
  <%= javascript_include_tag :defaults -%>
<%- end -%>