每天一个JS 小demo之滑屏幻灯片。主要知识点:event
导读:收集整理的这篇文章主要介绍了每天一个JS 小demo之滑屏幻灯片。主要知识点:event,觉得挺不错的,现在分享给大家,也给大家做个参考。<!DOCTYPE htML><html lang="en"><head...
收集整理的这篇文章主要介绍了每天一个JS 小demo之滑屏幻灯片。主要知识点:event,觉得挺不错的,现在分享给大家,也给大家做个参考。!DOCTYPE htML>
html lang="en">
head>
meta charset="UTF-8">
tITle> Document/title>
style type="text/css">
body {
margin: 0;
}
#wrap {
margin: 100px auto;
position: relative;
width: 400px;
height: 300px;
border: 5px solid #000;
overflow: hidden;
}
#list {
position: absolute;
left: 0;
top: 0;
width: 400%;
list-style: none;
padding: 0;
margin: 0;
}
#list li {
width: 25%;
float: left;
}
img {
vertical-align: top;
}
#navs {
position: absolute;
left: 0;
bottom: 30px;
height: 12px;
width: 100%;
text-align: center;
}
#navs a {
display: inline-block;
width: 12px;
height: 12px;
vertical-align: top;
background: #fff;
margin: 0 5px;
border-radius: 6px;
}
#navs .active {
background: #f60;
}
/style>
/head>
body>
!--
练习:
1. 实现自动播放
2. 添加上一张 下一张功能
3. 给下边的导航添加点击事件
-->
div id="wrap">
ul id="list">
li> img src="pic/1.jpg"/> /li>
li> img src="pic/2.jpg"/> /li>
li> img src="pic/3.jpg"/> /li>
li> img src="pic/4.jpg"/> /li>
/ul>
nav id="navs">
a href="javascript:; " class="active"> /a>
a href="javascript:; "> /a>
a href="javascript:; "> /a>
a href="javascript:; "> /a>
/nav>
/div>
script type="text/javascript" src="startmove.js"> /script>
script type="text/javascript">
(function(){
VAR wrap = document.querySelector('#wrap');
var list = document.querySelector('#list');
var navs = document.querySelectorAll('#navs a');
var wrapW = css(wrap,"width");
list.onmousedown = function(e){
clearInterval(list.timer); //清除动画
var startMouseX = e.clientX;
var elX = css(list,"left");
document.onmouSEMove = function(e){
var nowMouseX = e.clientX;
css(list,"left",nowMouseX - startMouseX + elX);
} ;
document.onmouseup = function(e){
document.onmousemove = null;
document.onmouseup = null;
var left = css(list,"left");
var now = -Math.round(left/wrapW); //获取到走了几张图
console.LOG(now);
now = now0?0:now;
now = now> navs.length-1?navs.length-1:now;
left = now * wrapW;
//计算走到这张图 left需要走的距离
startMove({
el: list,
target: {
left: -left
}
,
type: "easeOutstrong",
time: 800
}
);
for(var i = 0;
i navs.length;
i++){
navs[i].classname = "";
}
navs[now].className = "active";
}
;
return false;
//阻止默认事件(在这的作用阻止图片被选中)
}
;
}
)();
/script>
/body>
/html>
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