Detailed explanation of examples of js judging browser and hack scroll bars-JS Tutorial-php.cn

This article mainly introduces how to write JavaScript to judge browsers and hack scroll bars. Friends who need it can refer to it

I am bored today and help a netizen solve a very boring problem. Use JS to judge whether the page is A scroll bar appears. I read some codes on the Internet, but after verification, it does not work. The following is the code I searched on the Internet:

When the visible area is smaller than the actual height of the page, it is determined that the scroll bar appears

Determine the core of major browsers:

var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串 var isOpera = userAgent.indexOf("Opera") > -1; //判断是否Opera浏览器 var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera; //判断是否IE浏览器 var isEdge = userAgent.indexOf("Edge") > -1 && !isIE; //判断是否IE的Edge var?isFF?=?userAgent.indexOf("Firefox")>-1 //判断是否Firefox浏览器?? var?isSafari?=?userAgent.indexOf("Safari")>-1&&?userAgent.indexOf("Chrome")==-1; //判断是否Safari浏览器?? var?isChrome?=?userAgent.indexOf("Chrome")>-1&&?userAgent.indexOf("Edge")==-1; //判断Chrome浏览器?？

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Process each browser scroll bar. The following is how I write the scroll bar in the hidden company project, FYI:

if(isFF){ console.log('火狐') $('#parent').width((windowWidth -320)*(1.01749)); }else if(isChrome){ console.log('谷歌') $('#parent').width((windowWidth -320)*(1.01749)); }else if(isIE){ console.log('ie10-ie5') $('#parent').width((windowWidth -320)*(1.01720)); }else if(isEdge){ console.log('edge') $('#parent').width((windowWidth -320)*(1.02224)); }else{ console.log('ie11和其他浏览器') $('#parent').width((windowWidth -320)*(1.01816)); }

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