基于JS组件实现拖动滑块验证功能(代码分享)

拖动滑块验证功能在支付宝,微信各大平台都能见到这样的功能,那么基于js组件是如何实现此功能的呢?今天小编就给大家分享下js 拖动滑块 验证功能的实现代码,具体代码如下所示:

<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate">

<meta http-equiv="Pragma" content="no-cache">

<meta http-equiv="Expires" content="0">

<meta http-equiv="X-UA-Compatible" content="IE-Edge,chrome=1">

<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,minimum-scale=1,user-scalable=no">

<meta content="yes" name="apple-mobile-web-app-capable">

<meta content="black" name="apple-mobile-web-app-status-bar-style">

<meta content="telephone=no" name="format-detection">

<meta content="email=no" name="format-detection">

<title>拖动滑块验证</title>

<meta name="description" content="">

<meta name="keywords" content="">

<link rel="stylesheet" type="text/css" href="">

<style>

*{ 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,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAA3hpVFh0WE1MOmNvbS5hZG9iZS54bXAAAAAAADw/eHBhY2tldCBiZWdpbj0i77u/IiBpZD0iVzVNME1wQ2VoaUh6cmVTek5UY3prYzlkIj8+IDx4OnhtcG1ldGEgeG1sbnM6eD0iYWRvYmU6bnM6bWV0YS8iIHg6eG1wdGs9IkFkb2JlIFhNUCBDb3JlIDUuNS1jMDIxIDc5LjE1NTc3MiwgMjAxNC8wMS8xMy0xOTo0NDowMCAgICAgICAgIj4gPHJkZjpSREYgeG1sbnM6cmRmPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5LzAyLzIyLXJkZi1zeW50YXgtbnMjIj4gPHJkZjpEZXNjcmlwdGlvbiByZGY6YWJvdXQ9IiIgeG1sbnM6eG1wTU09Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC9tbS8iIHhtbG5zOnN0UmVmPSJodHRwOi8vbnMuYWRvYmUuY29tL3hhcC8xLjAvc1R5cGUvUmVzb3VyY2VSZWYjIiB4bWxuczp4bXA9Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC8iIHhtcE1NOk9yaWdpbmFsRG9jdW1lbnRJRD0ieG1wLmRpZDo0ZDhlNWY5My05NmI0LTRlNWQtOGFjYi03ZTY4OGYyMTU2ZTYiIHhtcE1NOkRvY3VtZW50SUQ9InhtcC5kaWQ6NTEyNTVEMURGMkVFMTFFNEI5NDBCMjQ2M0ExMDQ1OUYiIHhtcE1NOkluc3RhbmNlSUQ9InhtcC5paWQ6NTEyNTVEMUNGMkVFMTFFNEI5NDBCMjQ2M0ExMDQ1OUYiIHhtcDpDcmVhdG9yVG9vbD0iQWRvYmUgUGhvdG9zaG9wIENDIDIwMTQgKE1hY2ludG9zaCkiPiA8eG1wTU06RGVyaXZlZEZyb20gc3RSZWY6aW5zdGFuY2VJRD0ieG1wLmlpZDo2MTc5NzNmZS02OTQxLTQyOTYtYTIwNi02NDI2YTNkOWU5YmUiIHN0UmVmOmRvY3VtZW50SUQ9InhtcC5kaWQ6NGQ4ZTVmOTMtOTZiNC00ZTVkLThhY2ItN2U2ODhmMjE1NmU2Ii8+IDwvcmRmOkRlc2NyaXB0aW9uPiA8L3JkZjpSREY+IDwveDp4bXBtZXRhPiA8P3hwYWNrZXQgZW5kPSJyIj8+YiRG4AAAALFJREFUeNpi/P//PwMlgImBQkA9A+bOnfsIiBOxKcInh+yCaCDuByoswaIOpxwjciACFegBqZ1AvBSIS5OTk/8TkmNEjwWgQiUgtQuIjwAxUF3yX3xyGIEIFLwHpKyAWB+I1xGSwxULIGf9A7mQkBwTlhBXAFLHgPgqEAcTkmNCU6AL9d8WII4HOvk3ITkWJAXWUMlOoGQHmsE45ViQ2KuBuASoYC4Wf+OUYxz6mQkgwAAN9mIrUReCXgAAAABJRU5ErkJggg==") 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;}

</style>

</head>

<body>

<div class="wrap">

<div id="slider">

<div class="drag_bg"></div>

<div class="drag_text" onselectstart="return false;" unselectable="on">拖动滑块验证</div>

<div class="handler handler_bg"></div>

</div>

</div>

<script>

(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);

</script>

</body>

</html>

以上所述是小编给大家介绍的基于JS组件实现拖动滑块验证功能(代码分享),希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对网站的支持!

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