使用js块

#application.html.erb
<%= yield :javascripts %>

#index.html.erb
<%= content_for :javascripts do %>
    <script>
        $("#selectAll").select_all();
    </script>
<% end %>

application.js中turbolinks存在与否的加载区别

#不存在turblinks
$(document).ready(function(){
  //...
}

#存在turbolinks
$(document).on("turbolinks:load", function(){
 //...
})