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这篇文章主要介绍了原生js如何封装自定义滚动条,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。
效果图:
代码如下:
<!doctype html> <html> <head> <meta charset="utf-8"> <title></title> </head> <style type="text/css"> div{ padding:0px; box-sizing:border-box; margin:0px; border:0px; } #div-5{ width: 700px; height: 500px; border:1px solid black; position: relative; overflow: hidden; } .ribbit-OF-div1{ width: 20px; background-color: rgb(239, 238, 238); border:1px solid rgba(0,0,0,0.5); position: absolute; right:0px; top: 0px; cursor:default; } .ribbit-OF-div2{ position: absolute; top:0px; right: 0px; width: 100%; height: 100px; background-color:rgba(0,0,0,0.3); border-radius: 10px; } .ribbit-OF-div3{ width: 100%; height:auto; background-color: lime; } </style> <body> <div id="div-1"> <div id="div-2"> </div> </div> <div id="div-3"><div id="div-4"></div></div> <div id="div-5"> 123123<br/> qwe<br/> 12asd23<br/> asd3123<br/> qwe123<br/> 235423423<br/> azxc123<br/> 123123<br/> qwe<br/> 12asd23<br/> asd3123<br/> qwe123<br/> 235423423<br/> azxc123<br/> 123123<br/> qwe<br/> 12asd23<br/> asd3123<br/> qwe123<br/> 235423423<br/> azxc123<br/> 123123<br/> qwe<br/> 12asd23<br/> asd3123<br/> qwe123<br/> 235423423<br/> azxc123<br/> 123123<br/> qwe<br/> 12asd23<br/> asd3123<br/> qwe123<br/> 235423423<br/> azxc123<br/> 123123<br/> qwe<br/> 12asd23<br/> asd3123<br/> qwe123<br/> 235423423<br/> azxc123<br/>123123<br/> qwe<br/> 12asd23<br/> asd3123<br/> qwe123<br/> 235423423<br/> azxc123<br/> 123123<br/> qwe<br/> 12asd23<br/> asd3123<br/> qwe123<br/> 235423423<br/> azxc123<br/> 123123<br/> qwe<br/> 12asd23<br/> asd3123<br/> qwe123<br/> 235423423<br/> azxc123<br/> </div> </body> <script type="text/javascript"> var div_5 = document.getElementById('div-5'); function OverFlow(element){ this.element = element; this.ribbit_OF_div1 = document.createElement("div"); this.ribbit_OF_div2 = document.createElement("div"); this.ribbit_OF_div3 = document.createElement("div"); this.createDiv = function(){ this.ribbit_OF_div1.className = "ribbit-OF-div1"; this.ribbit_OF_div2.className = "ribbit-OF-div2"; this.ribbit_OF_div3.className = "ribbit-OF-div3"; this.ribbit_OF_div3.innerHTML = this.element.innerHTML; this.element.innerHTML=""; this.element.appendChild(this.ribbit_OF_div3); this.ribbit_OF_div1.appendChild(this.ribbit_OF_div2); document.body.appendChild(this.ribbit_OF_div1); this.ribbit_OF_div1.style.height = getComputedStyle(this.element,null).height; this.ribbit_OF_div1.style.left = (this.element.offsetLeft+(parseInt(getComputedStyle(this.element,null).width)-parseInt(getComputedStyle(this.ribbit_OF_div1,null).width)))+"px"; this.ribbit_OF_div1.style.top = this.element.offsetTop+"px"; this.ribbit_OF_div2.style.top = "0px"; } this.addAudo=function(){ var YY=null;//前鼠标位置 var topXX = 0;//前top位置 var topX = 0;//后top值 var vherght = parseInt(getComputedStyle(this.ribbit_OF_div3,null).height)-parseInt(getComputedStyle(this.element,null).height);//可移动 var dst = 0; //最大top移动位置 var top_x = parseInt(getComputedStyle(this.ribbit_OF_div1,null).height)-parseInt(getComputedStyle(this.ribbit_OF_div2,null).height); var thio = this; window.onmousemove = function(e){ fun(e.clientY); }; this.ribbit_OF_div2.onmousedown=function(e){ YY = e.clientY; topXX =parseInt(this.style.top); return false; } window.onmouseup=function(){ YY = null; return true; } function fun(y){ if(top_x>=topX&&topX>=0&&YY!=null){ topX = y-YY+topXX; if(topX<0)topX=0; if(topX>top_x)topX=top_x-1; thio.ribbit_OF_div2.style.top = (topX-1)+"px"; dst = topX*vherght/top_x; thio.element.scrollTop = dst; } } } this.createDiv(); this.addAudo(); } new OverFlow(div_5); </script> </html>
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