JSFiddle - React, Tailwind, and code Playground

by shiny bender

HTML

<p id="top">Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p> 
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>   
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,...

CSS

#go2Top{
    width: 1em;
    right: 2px;
    bottom: 2px;
    color: #555;            
    padding: 10px;
    display: block;
    font-size: 14px;
    position: fixed; 
    display: none;           
    text-decoration: none; 
    background: #DDD;
    background: rgba(221, 221, 221, .8);       
    border-radius: 4px;           
}
#go2Top:hover{
    background: #CCC; 
    background: rgba(204, 204, 204, .8);    
}

JavaScript

//SmoothScroll
(function($, window, undefined){
    var hasOwnProperty = Object.prototype.hasOwnProperty;
    
    function SmoothScroll(config){
        return this._init(config);
    }
    
    SmoothScroll.prototype = {
        constructor: SmoothScroll,
        
        _init: function(config){
            var me = this; 
            
            me._config = $.extend({
                //container 滚动条的容器
                //go2Top 返回顶部jQuery对象
                //destination 需滚动位置的jQuery对象
                duration: 500,//动画因子 
                scrollTop: 10
            }, config);
            me._cacheParam()._bindEventListener();
            
            return me;   
        },
        
        _cacheParam: function(){
            var i,
                me = this,
                config = me._config;
            
            for(i in config){
                if(hasOwnProperty.call(config, i)){
                    me['_' + i] = config[i];
                    config[i] = null;
                    delete config[i];   
                }
            }
            
            return me;
        },
        
        _bindEventListener: function(){
            var me = this,
                $go2Top = me._go2Top,
                $container = me._container;
            
            me._showOrHideGo2Top();    
            $container.on('scroll.smoothccroll', function(e){
                me._showOrHideGo2Top();
            });
            $go2Top.on('click.smoothccroll', function(e){
                me._smoothScroll();
                return false;
            }); 
            
            return me;   
        },
        
        _smoothScroll: function(duration){
            var step,
                distance,
                me = this,
                $container = me._container,
                destination = me._destination.offset().top;
            
            duration = duration == null ? me._duration : duration;
            if(duration < 0){
               ...