<html>
<head>
<title>title>
<meta charset="utf-8">
<link rel="stylesheet" type="text/css" href="RedJu.css">
<script type="text/javascript" src="RedJu.js">script>
head>
<body>
<div id="slideVerify">
<div class="image">
<div class="chip2">div>
<div class="chip">div>
div>
<div class="drag">
<div class="bg">div>
<div class="text" onselectstart="return false;">请拖动滑块解锁div>
<div class="btn">>>div>
div>
div>
<script type="text/javascript">
var slideVerify = new SlideVerify("img/",9);
script>
body>
html>
//;分号开头,用于防止代码压缩合并时与其它代码混在一起造成语法错误
//而事实证明,uglify压缩工具会将无意义的前置分号去掉,我只是习惯了这么写
//(function(){})();立即执行函数,闭包,避免污染全局变量
//通常一个插件只暴露一个变量给全局供其它程序调用
//还有其它写法,运算符+函数体+括号
//例:!function(){}(); +function(){}(); -function(){}();
// void function(){}(); 等等只要能对函数返回值进行运算的符号都可以
;(function(global) {
//开启严格模式,规范代码,提高浏览器运行效率
//"use strict";
//定义一个类,通常首字母大写
var SlideVerify = function(path,num) {
var slideVerify = document.getElementById('slideVerify'),
chip = slideVerify.getElementsByClassName('chip')[0],//图片小块
chip2 = slideVerify.getElementsByClassName('chip2')[0],
box = slideVerify.getElementsByClassName('drag')[0],
bg = slideVerify.getElementsByClassName('bg')[0],
text = slideVerify.getElementsByClassName('text')[0],
btn = slideVerify.getElementsByClassName('btn')[0],
image = slideVerify.getElementsByClassName('image')[0],
offsetX,//鼠标滑动距离
distance,// = //滑动成功的宽度(距离)
sildeWidth = box.offsetWidth - btn.offsetWidth,
status =false,
imgAt = Math.floor(Math.random()*num);
//var img = document.createElement('img');
//image.appendChild(img);
image.style.background = 'url('+path+imgAt+'.jpg)';
var getStatus = function(){
return status;
}
//二、给滑块注册鼠标按下事件
btn.onmousedown = function(e){
//1.鼠标按下之前必须清除掉后面设置的过渡属性
btn.style.transition = "";
bg.style.transition ="";
//说明:clientX 事件属性会返回当事件被触发时,鼠标指针向对于浏览器页面(或客户区)的水平坐标。
//2.当滑块位于初始位置时,得到鼠标按下时的水平位置
var e = e || window.event;
var downX = e.clientX;
//加载图片小块
ry = Math.floor(Math.random()*80)+20;
rx = Math.floor(Math.random()*150)+110;
chip.style.background = 'url('+path+imgAt+'.jpg)';
chip.style.top = ry+'px';
chip.style.backgroundPositionX = -rx+ 'px';
chip.style.backgroundPositionY = -ry+ 'px';
chip2.style.background = 'url('+path+imgAt+'.jpg)';
chip2.style.top = ry+'px';
chip2.style.left = rx+'px';
chip2.style.backgroundPositionX = -rx+ 'px';
chip2.style.backgroundPositionY = -ry+ 'px';
chip2.style['box-shadow'] = '5px 5px 10px black';
distance = rx;
//三、给文档注册鼠标移动事件
document.onmousemove = function(e){
var e = e || window.event;
//1.获取鼠标移动后的水平位置
var moveX = e.clientX;
//2.得到鼠标水平位置的偏移量(鼠标移动时的位置 - 鼠标按下时的位置)
offsetX = moveX - downX;
//3.在这里判断一下:鼠标水平移动的距离 与 滑动成功的距离 之间的关系
if( offsetX > sildeWidth){
offsetX = sildeWidth;//如果滑过了终点,就将它停留在终点位置
}else if( offsetX < 0){
offsetX = 0;//如果滑到了起点的左侧,就将它重置为起点位置
}
//4.根据鼠标移动的距离来动态设置滑块的偏移量和背景颜色的宽度
btn.style.left = offsetX + "px";
bg.style.width = offsetX + "px";
chip.style.left = offsetX + "px";
}
//四、给文档注册鼠标松开事件
document.onmouseup = function(e){
//如果鼠标的水平移动距离 = 滑动成功的宽度
if( offsetX - distance<8 && offsetX - distance>-8){
//1.设置滑动成功后的样式
text.innerHTML = "验证通过";
text.style.color = "#fff";
btn.innerHTML = "√";
btn.style.color = "green";
bg.style.backgroundColor = "lightgreen";
bg.style.width = sildeWidth + "px";
btn.style.left = sildeWidth + "px";
status = true;
//成功后,清除掉鼠标按下事件和移动事件(因为移动时并不会涉及到鼠标松开事件)
btn.onmousedown = null;
document.onmousemove = null;
image.onmousedown = null;
//3.成功解锁后的回调函数
// setTimeout(function(){
// alert('解锁成功!');
// },100);
}else{
//反之,则将滑块复位(设置了1s的属性过渡效果)
btn.style.left = 0;
bg.style.width = 0;
// btn.style.transition = "left 1s ease";
// bg.style.transition = "width 1s ease";
imgAt = Math.floor(Math.random()*num);
image.style.background = 'url('+path+imgAt+'.jpg)';
chip.style.background = null;
chip2.style.background = null;
chip2.style['box-shadow'] = null;
}
//只要鼠标松开了,说明此时不需要拖动滑块了,那么就清除鼠标移动和松开事件。
document.onmousemove = null;
document.onmouseup = null;
}
}
return {getStatus};
};
//覆写原型链,给继承者提供方法
SlideVerify.prototype = {
init: function() {
}
};
//兼容CommonJs规范
if (typeof module !== 'undefined' && module.exports) module.exports = SlideVerify;
//兼容AMD/CMD规范
if (typeof define === 'function') define(function() { return SlideVerify; });
//注册全局变量,兼容直接使用script标签引入该插件
global.SlideVerify = SlideVerify;
//this,在浏览器环境指window,在nodejs环境指global
//使用this而不直接用window/global是为了兼容浏览器端和服务端
//将this传进函数体,使全局变量变为局部变量,可缩短函数访问全局变量的时间
})(this);
#slideVerify .drag{
width: 300px;
height: 40px;
line-height: 40px;
background-color: #e8e8e8;
position: relative;
margin:0 auto;
}
#slideVerify .bg{
width:40px;
height: 100%;
position: absolute;
background-color: #75CDF9;
}
#slideVerify .text{
position: absolute;
width: 100%;
height: 100%;
text-align: center;
user-select: none;
}
#slideVerify .btn{
width:40px;
height: 38px;
position: absolute;
border:1px solid #ccc;
cursor: pointer;
font-family: "宋体";
text-align: center;
background-color: #fff;
user-select: none;
color:#666;
}
#slideVerify .chip{
width: 40px;
height: 40px;
position: absolute;
}
#slideVerify .chip2{
width: 40px;
height: 40px;
position: absolute;
-webkit-filter: brightness(0.5) opacity(0.5);
}
#slideVerify .image{
width: 300px;
height: 200px;
position:relative;
margin: 0 auto
}
效果: