Home > Web Front-end > JS Tutorial > Write a simple scroll bar example code in js

Write a simple scroll bar example code in js

零下一度
Release: 2017-06-27 10:36:07
Original
1073 people have browsed it
<!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>
Copy after login

js code

/**
 * 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(&#39;div&#39;);
                App.scollb = document.createElement(&#39;div&#39;);
                App.sdiv.setAttribute(&#39;class&#39;,&#39;scrollbars&#39;);
                App.scollb.setAttribute(&#39;class&#39;,&#39;scollb&#39;);
                App.scollb.style.height = parseFloat(this.h)*parseFloat(this.h)/parseFloat(this.ch) + &#39;px&#39;;
                App.el.appendChild(this.sdiv);
                App.sdiv.appendChild(this.scollb);
                App.initevent();
            }
        },/**绑定事件*/initevent:function (){
            App.el.addEventListener(&#39;touchstart&#39;, App.touchstart, false);
            App.el.addEventListener(&#39;touchmove&#39;, App.touchmove, false);
            App.el.addEventListener(&#39;touchend&#39;, 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'+'');
            }
        }
    }
})();
Copy after login

The above is the detailed content of Write a simple scroll bar example code in js. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template