script标记的type属性的javascript MIME类型是什么?[副本]

这是一个常见的错误。javascript的MIME类型多年来一直没有标准化。就是现在 officially : " 应用程序/javascript ".

这里真正的问题是,大多数浏览器无论如何都不会使用该属性,至少在script标签的情况下不会。他们实际上会窥探数据包内部,并自行确定类型。

因此,最重要的是,就javascript而言,type=“text/javascript”没有任何作用,但它是两者规范的一部分 HTML 4 和 XHTML 1.0 .

这是我找到的关于这个话题的第一页,对它没有任何意义。

我的集体研究表明:

1. text/javascript 正如Keparo所说,如果你想验证它,就必须在html4和xhtml1中使用。尽管浏览器会忽略它。
2. application/javascript 如果大家都同意,并且一切进展顺利,预计将成为新的官方MIME类型。
3. application/x-javascript (x表示非官方)是当前javascript的服务器端MIME引用。
4. 每个人都希望,像往常一样,微软将决定做一些完全不同的事情来进一步混淆和填塞这件事。

摘要:目前,如果您希望您的html/xhtml在MSIE中工作并与W3C验证,请声明 type="text/javascript" .如果你想让你的web服务器知道你的意思是javascript,那么使用 应用程序/x-javascript .

text/javascript

我认为IE不接受application/x-javascript

Specifying the scripting language

在脚本标签中,我会使用 text/javascript 。这出现在 the HTML 4.0 specification 不管怎样。

有趣的是 RFC 标准化 application/javascript 是2006年的,但是 text/javascript 更为常见。这是另一个习惯战胜标准的案例吗? 它也出现在 HTML5 这可能是因为避免使用PNG图像的原因——与IE 5和6兼容。

定义Javascript MIME类型的官方RFC是 RFC4329 .

     
7.  JavaScript Media Types

7.1.  text/javascript (obsolete)

   Type name:               text
   Subtype name:            javascript
   Required parameters:     none
   Optional parameters:     charset, see section 4.1.
   Encoding considerations:
      The same as the considerations in section 3.1 of [RFC3023].

   Security considerations: See section 5.
   Interoperability considerations:
      None, except as noted in other sections of this document.

   Published specification: [JS15]
   Applications which use this media type:
      Script interpreters as discussed in this document.

   Additional information:

      Magic number(s):             n/a
      File extension(s):           .js
      Macintosh File Type Code(s): TEXT

   Person & email address to contact for further information:
      See Author's Address section.

   Intended usage:          OBSOLETE
   Restrictions on usage:   n/a
   Author:                  See Author's Address section.
   Change controller:       The IESG.

7.2.  application/javascript

   Type name:               application
   Subtype name:            javascript
   Required parameters:     none
   Optional parameters:     charset, see section 4.1.
   Encoding considerations:
      The same as the considerations in section 3.2 of [RFC3023].

   Security considerations: See section 5.
   Interoperability considerations:
      None, except as noted in other sections of this document.

   Published specification: [JS15]
   Applications which use this media type:
      Script interpreters as discussed in this document.

   Additional information:

      Magic number(s):             n/a
      File extension(s):           .js
      Macintosh File Type Code(s): TEXT

   Person & email address to contact for further information:
      See Author's Address section.

   Intended usage:          COMMON
   Restrictions on usage:   n/a
   Author:                  See Author's Address section.
   Change controller:       The IESG.