相关疑难解决方法(0)

我一直在查看HTML 5样板模板(来自http://html5boilerplate.com/),并注意到"?v=1"在引用CSS和Javascript文件时使用URL.

1. "?v=1"在链接和脚本标记中附加到CSS和Javascript URL的作用是什么？
2. 并非所有Javascript URL都具有"?v=1"(示例来自以下示例:) js/modernizr-1.5.min.js.有这样的原因吗？

来自他们的样本index.html:

<!-- CSS : implied media="all" -->
<link rel="stylesheet" href="css/style.css?v=1">

<!-- For the less-enabled mobile browsers like Opera Mini -->
<link rel="stylesheet" media="handheld" href="css/handheld.css?v=1">

<!-- All JavaScript at the bottom, except for Modernizr which enables HTML5 elements & feature detects -->
<script src="js/modernizr-1.5.min.js"></script>

<!------ Some lines removed ------>

<script src="js/plugins.js?v=1"></script>
<script src="js/script.js?v=1"></script>

<!--[if lt IE 7 ]>
  <script src="js/dd_belatedpng.js?v=1"></script>
<![endif]-->


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