Implement drag slider verification function based on JS component

The drag slider verification function can be seen on all major platforms such as Alipay and WeChat. So how is this function implemented based on js components? Today I will share with you the implementation code of js drag slider verification function. The specific code is as follows:

拖动滑块验证 *{ margin:0; padding:0; } body{ font:12px/1.125 Microsoft YaHei; background:#fff; } ul, li{ list-style:none; } a{ text-decoration:none; } .ani{transition:all .3s;} .wrap{ width:300px; height:350px; text-align:center; margin:150px auto;} .inner{ padding:15px; } .clearfix{ overflow:hidden; _zoom:1; } .none{ display:none; } #slider{position:relative;background-color:#e8e8e8;width:300px;height:34px;line-height:34px;text-align:center;} #slider .handler{position:absolute;top:0px;left:0px;width:40px;height:32px;border:1px solid #ccc;cursor:move;} .handler_bg{background:#fff url("data:image/png;base64,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") no-repeat center;} .handler_ok_bg{background:#fff url("data:image/png;base64,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") no-repeat center;} #slider .drag_bg{background-color:#7ac23c;height:34px;width:0px;} #slider .drag_text{position:absolute;top:0px;width:300px;-moz-user-select:none;-webkit-user-select:none;user-select:none;-o-user-select:none;-ms-user-select:none;} .unselect{-moz-user-select:none;-webkit-user-select:none;-ms-user-select:none;} .slide_ok{color:#fff;} 拖动滑块验证 (function(window,document,undefined){ var dog = {//声明一个命名空间，或者称为对象 $:function(id){ return document.querySelector(id); }, on:function(el,type,handler){ el.addEventListener(type,handler,false); }, off:function(el,type,handler){ el.removeEventListener(type,handler,false); } }; //封装一个滑块类 function Slider(){ var args = arguments[0]; for(var i in args){ this[i] = args[i]; //一种快捷的初始化配置 } //直接进行函数初始化，表示生成实例对象就会执行初始化 this.init(); } Slider.prototype = { constructor:Slider, init:function(){ this.getDom(); this.dragBar(this.handler); }, getDom:function(){ this.slider = dog.$('#'+this.id); this.handler = dog.$('.handler'); this.bg = dog.$('.drag_bg'); }, dragBar:function(handler){ var that = this, startX = 0, lastX = 0, doc = document, width = this.slider.offsetWidth, max = width - handler.offsetWidth, drag = { down:function(e){ var e = e||window.event; that.slider.classList.add('unselect'); startX = e.clientX - handler.offsetLeft; console.log('startX: '+startX+' px'); dog.on(doc,'mousemove',drag.move); dog.on(doc,'mouseup',drag.up); return false; }, move:function(e){ var e = e||window.event; lastX = e.clientX - startX; lastX = Math.max(0,Math.min(max,lastX)); //这一步表示距离大于0小于max，巧妙写法 console.log('lastX: '+lastX+' px'); if(lastX>=max){ handler.classList.add('handler_ok_bg'); that.slider.classList.add('slide_ok'); dog.off(handler,'mousedown',drag.down); drag.up(); } that.bg.style.width = lastX + 'px'; handler.style.left = lastX + 'px'; }, up:function(e){ var e = e||window.event; that.slider.classList.remove('unselect'); if(lastX < width){ that.bg.classList.add('ani'); handler.classList.add('ani'); that.bg.style.width = 0; handler.style.left = 0; setTimeout(function(){ that.bg.classList.remove('ani'); handler.classList.remove('ani'); },300); } dog.off(doc,'mousemove',drag.move); dog.off(doc,'mouseup',drag.up); } }; dog.on(handler,'mousedown',drag.down); } }; window.S = window.Slider = Slider; })(window,document); var defaults = { id:'slider' }; new S(defaults);

Implement drag slider verification function based on JS component

Related articles