JavaScript实现登录滑动验证
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PS：
附上代码，有需要自己更改，
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>滑块解锁封装js方法</title>
<!--注：这里首次用到了iconfont的语法，即矢量图标-->
<link rel="stylesheet" href="font/iconfont.css">
<style>
*{
padding: 0;
margin: 0;
}
#box{
position: relative;
width: 300px;
height: 40px;
margin: 0 auto;
margin-top: 10px;
background-color: #e8e8e8;
box-shadow: 1px 1px 5px rgba(0,0,0,0.2);
}
.bgColor{
position: absolute;
left:0;
top:0;
width:40px;
height: 40px;
background-color: lightblue;
}
.txt{
position: absolute;
width: 100%;
height: 40px;
line-height: 40px;
font-size: 14px;
color: #000;
text-align: center;
}
.slider{
position: absolute;
left:0;
top:0;
width: 50px;
height: 38px;
border: 1px solid #ccc;
background: #fff;
text-align: center;
cursor: move;
}
.slider>i{
position: absolute;
top:50%;
left:50%;
transform: translate(-50%,-50%);
}
.slider.active>i{
color:green;
}
.btn {
position: absolute;
width: 40px;
height: 32px;
background: #fff url(data:image/png;base64,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) center no-repeat;
background-size: 13px;//不设置这个属性，背景图片会不成比例的显示
border: 1px solid #ccc;
cursor: move;
}
.btns {
position: absolute;
width: 40px;
height: 32px;
background: #fff url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAA3hpVFh0WE1MOmNvbS5hZG9iZS54bXAAAAAAADw/eHBhY2tldCBiZWdpbj0i77u/IiBpZD0iVzVNME1wQ2VoaUh6cmVTek5UY3prYzlkIj8+IDx4OnhtcG1ldGEgeG1sbnM6eD0iYWRvYmU6bnM6bWV0YS8iIHg6eG1wdGs9IkFkb2JlIFhNUCBDb3JlIDUuNS1jMDIxIDc5LjE1NTc3MiwgMjAxNC8wMS8xMy0xOTo0NDowMCAgICAgICAgIj4gPHJkZjpSREYgeG1sbnM6cmRmPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5LzAyLzIyLXJkZi1zeW50YXgtbnMjIj4gPHJkZjpEZXNjcmlwdGlvbiByZGY6YWJvdXQ9IiIgeG1sbnM6eG1wTU09Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC9tbS8iIHhtbG5zOnN0UmVmPSJodHRwOi8vbnMuYWRvYmUuY29tL3hhcC8xLjAvc1R5cGUvUmVzb3VyY2VSZWYjIiB4bWxuczp4bXA9Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC8iIHhtcE1NOk9yaWdpbmFsRG9jdW1lbnRJRD0ieG1wLmRpZDo0ZDhlNWY5My05NmI0LTRlNWQtOGFjYi03ZTY4OGYyMTU2ZTYiIHhtcE1NOkRvY3VtZW50SUQ9InhtcC5kaWQ6NDlBRDI3NjVGMkQ2MTFFNEI5NDBCMjQ2M0ExMDQ1OUYiIHhtcE1NOkluc3RhbmNlSUQ9InhtcC5paWQ6NDlBRDI3NjRGMkQ2MTFFNEI5NDBCMjQ2M0ExMDQ1OUYiIHhtcDpDcmVhdG9yVG9vbD0iQWRvYmUgUGhvdG9zaG9wIENDIDIwMTQgKE1hY2ludG9zaCkiPiA8eG1wTU06RGVyaXZlZEZyb20gc3RSZWY6aW5zdGFuY2VJRD0ieG1wLmlpZDphNWEzMWNhMC1hYmViLTQxNWEtYTEwZS04Y2U5NzRlN2Q4YTEiIHN0UmVmOmRvY3VtZW50SUQ9InhtcC5kaWQ6NGQ4ZTVmOTMtOTZiNC00ZTVkLThhY2ItN2U2ODhmMjE1NmU2Ii8+IDwvcmRmOkRlc2NyaXB0aW9uPiA8L3JkZjpSREY+IDwveDp4bXBtZXRhPiA8P3hwYWNrZXQgZW5kPSJyIj8+k+sHwwAAASZJREFUeNpi/P//PwMyKD8uZw+kUoDYEYgloMIvgHg/EM/ptHx0EFk9I8wAoEZ+IDUPiIMY8IN1QJwENOgj3ACo5gNAbMBAHLgAxA4gQ5igAnNJ0MwAVTsX7IKyY7L2UNuJAf+AmAmJ78AEDTBiwGYg5gbifCSxFCZoaBMCy4A4GOjnH0D6DpK4IxNSVIHAfSDOAeLraJrjgJp/AwPbHMhejiQnwYRmUzNQ4VQgDQqXK0ia/0I17wJiPmQNTNBEAgMlQIWiQA2vgWw7QppBekGxsAjIiEUSBNnsBDWEAY9mEFgMMgBk00E0iZtA7AHEctDQ58MRuA6wlLgGFMoMpIG1QFeGwAIxGZo8GUhIysmwQGSAZgwHaEZhICIzOaBkJkqyM0CAAQDGx279Jf50AAAAAABJRU5ErkJggg==) center no-repeat;
background-size: 13px;//不设置这个属性，背景图片会不成比例的显示
border: 1px solid #ccc;
cursor: move;
}
</style>
</head>
<body>
<div id="box" onselectstart="return false;">
<div class="bgColor"></div>
<div class="txt" >滑动解锁</div>
<!--给i标签添加上相应字体图标的类名即可-->
<div class="slider"><i class="btn"></i></div>
</div>
<script>
//一、定义了一个获取元素的方法
function getEle(selector){
return document.querySelector(selector);
}
//二、获取到需要用到的DOM元素
var box = getEle("#box"),//容器
bgColor = getEle(".bgColor"),//背景色
txt = getEle(".txt"),//文本
slider = getEle(".slider"),//滑块
icon = getEle(".slider>i"),
successMoveDistance = box.offsetWidth- slider.offsetWidth,//解锁需要滑动的距离
downX,//用于存放鼠标按下时的位置
isSuccess = false;//是否解锁成功的标志，默认不成功
//三、给滑块添加鼠标按下事件
slider.onmousedown = mousedownHandler;
//3.1鼠标按下事件的方法实现
function mousedownHandler(e){
bgColor.style.transition = "";
slider.style.transition = "";
var e = e || window.event || e.which;
downX = e.clientX;
//在鼠标按下时，分别给鼠标添加移动和松开事件
document.onmousemove = mousemoveHandler;
document.onmouseup = mouseupHandler;
};
//四、定义一个获取鼠标当前需要移动多少距离的方法
function getOffsetX(offset,min,max){
if(offset < min){
offset = min;
}else if(offset > max){
offset = max;
}
return offset;
}
//3.1.1鼠标移动事件的方法实现
function mousemoveHandler(e){
var e = e || window.event || e.which;
var moveX = e.clientX;
var offsetX = getOffsetX(moveX - downX,0,successMoveDistance);
bgColor.style.width = offsetX + "px";
slider.style.left = offsetX + "px";
if(offsetX == successMoveDistance){
success();
}
//如果不设置滑块滑动时会出现问题（目前还不知道为什么）
e.preventDefault();
};
//3.1.2鼠标松开事件的方法实现
function mouseupHandler(e){
if(!isSuccess){
bgColor.style.width = 0 + "px";
slider.style.left = 0 + "px";
bgColor.style.transition = "width 0.8s linear";
slider.style.transition = "left 0.8s linear";
}
document.onmousemove = null;
document.onmouseup = null;
};
//五、定义一个滑块解锁成功的方法
function success(){
isSuccess = true;
txt.innerHTML = "解锁成功";
bgColor.style.backgroundColor ="lightgreen";
slider.className = "slider active";
icon.className = "btns";
//滑动成功时，移除鼠标按下事件和鼠标移动事件
slider.onmousedown = null;
document.onmousemove = null;
};
</script>
</body>
</html>
