将defer属性添加到javascript_include_tag Rails
问题描述：
是否可以使用Rails中的 javascript_include_tag 帮助器轻松地添加 defer 属性？
Is there some way to add the defer attribute easily using the javascript_include_tag helper in Rails?
即，有一些简单的方法可以转弯
I.e., is there some easy way to turn
<％= javascript_include_tag blah.js ％>
成
<脚本延迟src = blah.js>< / script>
答
<%= javascript_include_tag "blah.js", :defer => "defer" %>
这将使您（开发中）：
<script defer="defer" src="/assets/blah.js" type="text/javascript"></script>