<!doctype html><html><head><title>滑动条</title><meta charset="utf-8"><meta name="apple-mobile-web-app-capable" content="yes" /><meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" /><script type="text/javascript" src="./hscoll.js?1.1.11"></script></head><style>*{margin: 0;padding: 0;}#content{margin-top: 50px;width:100%;height: 200px;background: #eeeeee;overflow: hidden;position: relative;/**transform: translate(0px, -70px);*/}#scoll{overflow: hidden;}#content2{margin-top: 50px;width:100%;height: 200px;background: red;overflow: hidden;position: relative;/**transform: translate(0px, -70px);*/}#scoll2{overflow: hidden;}.scrollbars{position: absolute;height: 100%;right: 0;top: 0;width: 5px;border-radius: 5px;}.scollb{position: absolute;right: 0;top: 0;width: 100%;background: #999999;border-radius: 5px;}</style><body><div id="content"><div id="scoll"><p>1111</p><p>2222</p><p>3333</p><p>4444</p><p>5555</p><p>6666</p><p>7777</p><p>8888</p><p>9999</p><p>0000</p><p>aaaa</p><p>bbbb</p><p>cccc</p><p>dddd</p><p>eeee</p></div></div></body><script>var options ={
interactivescrollbars:true}
window.hscoll.buildscoll('content',options);</script></html>
js 代码
/**
* created by hechao on 2017/6/25. */(function(){/**添加window对象hscoll属性*/window.hscoll = {
buildscoll:function(el,options){
app.init(el,options);
}
}var app = {/**初始化组件*/init:function(el,option){
app.options = option;
app.prevy = 0;
app.el = document.getelementbyid(el);
app.scoll = this.el.children[0];
app.h = this.el.offsetheight;//滑动范围高度app.ch = this.el.scrollheight;//内容的高度if(parsefloat(this.h)<=parsefloat(this.ch)){
app.sdiv = document.createelement('div');
app.scollb = document.createelement('div');
app.sdiv.setattribute('class','scrollbars');
app.scollb.setattribute('class','scollb');
app.scollb.style.height = parsefloat(this.h)*parsefloat(this.h)/parsefloat(this.ch) + 'px';
app.el.appendchild(this.sdiv);
app.sdiv.appendchild(this.scollb);
app.initevent();
}
},/**绑定事件*/initevent:function (){
app.el.addeventlistener('touchstart', app.touchstart, false);
app.el.addeventlistener('touchmove', app.touchmove, false);
app.el.addeventlistener('touchend', app.touchend, false);
},/**记录滑动初始位置*/touchstart:function(e){var point = app.getpoint(e);
app.starty = point.pagey;
},/**手指移动时，滚动条滚动*/touchmove:function(e){
e.preventdefault();//阻止默认行为var point = app.getpoint(e);
app.movey = point.pagey;
app.deltay = app.starty - app.movey;if((app.prevy - app.deltay)<=0 && (app.prevy - app.deltay)>= -(app.ch-app.h)){
app.domove(app.prevy - app.deltay);
}if(app.options.interactivescrollbars){
app.domove2(app.prevy - app.deltay);
}else{if((app.prevy - app.deltay)<=0 && (app.prevy - app.deltay)>= -(app.ch-app.h)){
app.domove2(app.prevy - app.deltay);
}
}
},/**手指离开时，判断位置*/touchend:function(e){
app.prevy = app.prevy - app.deltay;if(app.prevy >= 0){
app.prevy = 0;
app.domove(app.prevy,true);
app.domove2(app.prevy,true);
}if(app.prevy <= -(app.ch-app.h)){
app.prevy = -(app.ch-app.h);
app.domove(app.prevy,true);
app.domove2(app.prevy,true);
}
},
getpoint:function (e) {return e.touches ? e.touches[0] : e;
},/**内容滑动*/domove:function (y,t){if(t){
app.scoll.setattribute('style', 'transform: translate(0px, '+y+'px);transition:transform 300ms ease');
}else{
app.scoll.setattribute('style', 'transform: translate(0px, '+y+'px);transition:transform 0ms ease');
}
},/**滚动条滑动*/domove2:function(y,t){if(t){
app.scollb.setattribute('style', 'transform: translate(0px, '+-parsefloat(y)*parsefloat(app.h)/parsefloat(app.ch)+'px);transition:transform 0ms ease;height:'+parsefloat(app.h)*parsefloat(app.h)/parsefloat(app.ch) + 'px'+'');
}else{
app.scollb.setattribute('style', 'transform: translate(0px, '+-parsefloat(y)*parsefloat(app.h)/parsefloat(app.ch)+'px);transition:transform 0ms ease;height:'+parsefloat(app.h)*parsefloat(app.h)/parsefloat(app.ch) + 'px'+'');
}
}
}
})();
以上就是js写一个简单的滚动条实例代码的详细内容。