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Javascript Include Tag Best Practice in a Rails Application

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死守一世寂寞
死守一世寂寞 2020-12-12 11:50

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


<%= javascript_incl
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4条回答
  • 盖世英雄少女心
    2020-12-12 12:28

    I usually have the following in the layout file:

    <head>
  <%= javascript_include_tag :defaults %> <!-- For example -->
  <%= @extra_head_content %>
</head>

    And then in the views:

    <% (@extra_head_content ||= "") += capture do %>
  <%= other_content %>
<% end %>

    See the API documentation for #capture

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  • 旧时难觅i
    2020-12-12 12:37

    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

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

    And send it there from a view:

    <%- content_for(:js) do -%>
  <%= javascript_include_tag :defaults -%>
<%- end -%>
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  • 鱼传尺愫
    2020-12-12 12:43

    I feel there's nothing wrong including all yr defaults since they can then be cached on user's browser.

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  • 悲&欢浪女
    2020-12-12 12:48

    I would use content_for.

    For instance, specify the place to insert it in the application layout:

    <head>
<title>Merry Christmas!</title>
<%= yield(:head) -%>
</head>

    And send it there from a view:

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