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[Java教程]type=application/javascript


    type="application/javascript"

html script 标签中 type有如下这些值,请问分别是什么意思,在什么情况下使用?
  • type="text/javascript" 
  • type="application/javascript" 
  • type="application/x-javascript" 

这3个有什么区别吗 ?
 

 

 

  1. The traditional MIME type forJavaScript programs is "text/javascript".Another type that has been used is "application/x-javascript"(the "x" prefix indicates that it is an experimental, nonstandard type). RFC 4329 standardized the "text/javascript" type because it is in common use.However, because JavaScript programs are not really text documents, it marks this type as obsolete and recommends "application/javascript"(without the "x-") instead.At the time of this writing,"application/javascript" is not well supported, however.That might be the reason why "application/x-javascript" is used by a lot of webpages.

 

 

大致意思是:传统的javascript程序的MIME类型是“text/javascript”,其他使用的还有"application/x-javascript"(x前缀表示这是实验性的,不是标准的类型),RFC4329规定了“text/javascript”类型,因为它普遍被使用。然而,javascript程序并不是真正的文本文件,这就表示这个类型已经意味着过时了,而推荐使用"application/javascript"(去除x前缀)。然而,在写程序的时候,"application/javascript"没有很好的支持。这也就是"application/x-javascript"不被使用在很多网页中的原因。

 

您是否很疑惑为什么我们没有在<script>标签中使用 type="text/javascript"?


 

在 HTML5 中,不必那样做了。JavaScript 是 HTML5 以及所有现代浏览器中的默认脚本语言!