Home Web Front-end HTML Tutorial 学习笔记:发现一个IE版本判断的好方法_html/css_WEB-ITnose

学习笔记:发现一个IE版本判断的好方法_html/css_WEB-ITnose

Jun 24, 2016 am 11:36 AM

web开发就不得不面对浏览器兼容性问题,特别是IE的兼容问题。在前端代码中经常要处理一些兼容格式,为了解决这个问题网上找了找识别浏览器版本的方法。

 

常规js方法

找到一个方法,还不错,可以识别出各种浏览器的版本:

 

/** * 获取浏览器版本 * @returns {Array} */function browserVersion() {    ua = navigator.userAgent;    ua = ua.toLocaleLowerCase();     if (ua.match(/msie/) != null || ua.match(/trident/) != null) {        browserType = "IE";        //哈哈,现在可以检测ie11.0了!        browserVersion = ua.match(/msie ([\d.]+)/) != null ? ua.match(/msie ([\d.]+)/)[1] : ua.match(/rv:([\d.]+)/)[1];    } else if (ua.match(/firefox/) != null) {        browserType = "火狐";    } else if (ua.match(/opera/) != null) {        browserType = "欧朋";    } else if (ua.match(/chrome/) != null) {        browserType = "谷歌";    } else if (ua.match(/safari/) != null) {        browserType = "Safari";    }    var arr = new Array(browserType, browserVersion);    return arr;}
Copy after login

   

在代码中直接使用也比较简单了。

 

IE的条件注释

在一次偶然的机会看网金社的前端代码,发现一段很特别的注释:

 

这个貌似有点神奇,看代码的意思是一个跳转,但显示是注释的语句,于是抱着试一试的态度将浏览器切换到IE低版本,果然是有效果的。赶紧网上开始找这方面的资料,有一些用法说明,看来确实是可行的方案。

 

条件注释属性:

gt : greater than,选择条件版本以上版本,不包含条件版本

lt : less than,选择条件版本以下版本,不包含条件版本

gte : greater than or equal,选择条件版本以上版本,包含条件版本

lte : less than or equal,选择条件版本以下版本,包含条件版本

! : 选择条件版本以外所有版本,无论高低

用法:

用于非 IE

参考: http://baike.sogou.com/v66165627.htm

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