使IE8以下的IE浏览器也支持图片的data协议

最新推荐文章于 2025-09-21 08:51:04 发布

最新推荐文章于 2025-09-21 08:51:04 发布 · 594 阅读

文章标签：

#IE #浏览器 #CSS #HTML

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本文介绍了一种利用MHTML格式来减少网页加载时HTTP请求次数的方法，通过将多个资源捆绑到一个MHTML文件中，可以有效提升网页加载速度。

参见[url]http://www.phpied.com/mhtml-when-you-need-data-uris-in-ie7-and-under/[/url]
测试页面：[url]http://phpied.com/files/mhtml/mhtml.html[/url]

原理是使用MHTML（Multipurpose Internet Mail Extensions HyperText Markup Language） hack


/*
Content-Type: multipart/related; boundary="_ANY_STRING_WILL_DO_AS_A_SEPARATOR"

--_ANY_STRING_WILL_DO_AS_A_SEPARATOR
Content-Location:locoloco
Content-Transfer-Encoding:base64

iVBORw0KGgoAAAANSUhEUgAAAAQAAAADCAIAAAA7ljmRAAAAGElEQVQIW2P4DwcMDAxAfBvMAhEQMYgcACEHG8ELxtbPAAAAAElFTkSuQmCC
--_ANY_STRING_WILL_DO_AS_A_SEPARATOR
Content-Location:polloloco
Content-Transfer-Encoding:base64

iVBORw0KGgoAAAANSUhEUgAAABkAAAAUBAMAAACKWYuOAAAAMFBMVEX///92dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnYvD4PNAAAAD3RSTlMAACTkfhvbh3iEewTtxBIFliR3AAAAUklEQVQY02NgIBMwijgKCgrAef5fkHnz/y9E4kn+/4XEE6z/34jEE///A4knev7zAwQv7L8RQk40/7MiggeUQpjJff+zIpINykbIbhFSROIRDQAWUhW2oXLWAQAAAABJRU5ErkJggg==
*/

#test1 {
  background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAADCAIAAAA7ljmRAAAAGElEQVQIW2P4DwcMDAxAfBvMAhEQMYgcACEHG8ELxtbPAAAAAElFTkSuQmCC"); /* normal */
  *background-image: url(mhtml:http://phpied.com/files/mhtml/mhtml.css!locoloco); /* IE < 8 */
}


#test2 {
  background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABkAAAAUBAMAAACKWYuOAAAAMFBMVEX///92dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnZ2dnYvD4PNAAAAD3RSTlMAACTkfhvbh3iEewTtxBIFliR3AAAAUklEQVQY02NgIBMwijgKCgrAef5fkHnz/y9E4kn+/4XEE6z/34jEE///A4knev7zAwQv7L8RQk40/7MiggeUQpjJff+zIpINykbIbhFSROIRDQAWUhW2oXLWAQAAAABJRU5ErkJggg=="); /* normal */
  *background-image: url(mhtml:http://phpied.com/files/mhtml/mhtml.css!polloloco); /* IE < 8 */
}

div {
  width: 100px;
  height: 100px;
  font: bold 24px Arial;
}