js获取滚动条，文档，浏览器高度

不说话，直接上代码

//滚动条在Y轴上的滚动距离 getScrollTop(){ 　　var scrollTop = 0, bodyScrollTop = 0, documentScrollTop = 0; 　　if(document.body){ 　　　　bodyScrollTop = document.body.scrollTop; 　　} 　　if(document.documentElement){ 　　　　documentScrollTop = document.documentElement.scrollTop; 　　} 　　scrollTop = (bodyScrollTop - documentScrollTop > 0) ? bodyScrollTop : documentScrollTop; 　　return scrollTop; } //浏览器视口的高度 getWindowHeight(){ 　　var windowHeight = 0; 　　if(document.compatMode == "CSS1Compat"){ 　　　　windowHeight = document.documentElement.clientHeight; 　　}else{ 　　　　windowHeight = document.body.clientHeight; 　　} 　　return windowHeight; }

 

//文档的总高度 getScrollHeight(){ 　　var scrollHeight = 0, bodyScrollHeight = 0, documentScrollHeight = 0; 　　if(document.body){ 　　　　bodyScrollHeight = document.body.scrollHeight; 　　} 　　if(document.documentElement){ 　　　　documentScrollHeight = document.documentElement.scrollHeight; 　　} 　　scrollHeight = (bodyScrollHeight - documentScrollHeight > 0) ? bodyScrollHeight : documentScrollHeight; 　　return scrollHeight; }

 

转载于:https://www.cnblogs.com/bigDipper/p/7815226.html