text/javascript 和 application/javascript 有什么区别
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what is difference between text/javascript and application/javascript
提问by Avinash
Possible Duplicate:
When serving JavaScript files, is it better to use the application/javascript or application/x-javascript
可能的重复：
在提供 JavaScript 文件时，使用 application/javascript 还是 application/x-javascript 更好
what is difference between text/javascript and application/javascript?
text/javascript 和 application/javascript 有什么区别？
As IE will completely ignore the script tag if you have set type attribute to application/javascript.
如果您将 type 属性设置为 application/javascript，IE 将完全忽略脚本标记。
But what is the main difference and in which case we need to use the particular.
但是主要区别是什么，在这种情况下我们需要使用特定的。
回答by Quentin
text/javascriptwas introduced when the web was young and people hadn't thought things through.
text/javascript当网络还很年轻并且人们还没有考虑清楚时，它就被引入了。
Then people thought things through, and decided that text/*should be reserved for things designed to be human readable (which is why some XML is text/xmland other XML is application/xml). JavaScript is not human readable, so text/javascriptwas deprecated and application/javascriptwas introduced to replace it.
然后人们仔细考虑了事情，并决定text/*应该保留给设计为人类可读的东西（这就是为什么有些 XML 是text/xml而其他 XML 是application/xml）。JavaScript 不是人类可读的，因此text/javascript被弃用application/javascript并被引入以取代它。
Years later, some browsers still haven't caught up.
多年后，一些浏览器仍然没有赶上。
You can configure your server to always serve application/javascriptin the HTTP headers; browsers that don't support it also pay no attention to the actual content-type.
您可以将服务器配置为始终application/javascript在 HTTP 标头中提供服务；不支持它的浏览器也不关心实际的内容类型。
For the time being, if you are writing HTML 4 or XHTML 1, specify text/javascriptin the type attribute for the sake of backwards compatibility. If you are writing HTML 5, then omit the type attribute (as it is now optional).
目前，如果您正在编写 HTML 4 或 XHTML 1，text/javascript为了向后兼容，请在 type 属性中指定。如果您正在编写 HTML 5，则省略 type 属性（因为它现在是可选的）。
回答by jsalonen
HTML 4.01 (1999) specification suggests using MIME type text/javascript(http://www.w3.org/TR/1999/REC-html401-19991224/interact/scripts.html#h-18.2.2.2).
HTML 4.01 (1999) 规范建议使用 MIME 类型text/javascript( http://www.w3.org/TR/1999/REC-html401-19991224/interact/scripts.html#h-18.2.2.2)。
However, RFC 4329 (2006) now recommends the use of application/javascript.
但是，RFC 4329 (2006) 现在建议使用application/javascript.
It seems that historically text/javascriptwas used a lot and since it was the type that browsers most likely supported, this was the type that got suggested also in the HTML specification. Ideally, you would use application/javascript.
似乎历史text/javascript上使用了很多，并且由于它是浏览器最有可能支持的类型，因此这也是 HTML 规范中建议的类型。理想情况下，您将使用application/javascript.
In practice you may need to use text/javascriptto provide compatibility with less-conforming browsers.
在实践中，您可能需要使用text/javascript来提供与不太符合要求的浏览器的兼容性。
