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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Demo</title>
<style>
.clearfix {
zoom: 1;
}
.clearfix:after {
clear: both;
display: block;
height: 0;
content: '';
visibility: hidden;
}
em {
color: red;
font-style: normal;
}
.wrap {
position: relative;
margin: 100px auto;
width: 400px;
font-size: 12px;
}
.wrap ul {
list-style-type: none;
padding: 0;
text-align: center;
line-height: 100px;
}
.wrap li {
float: left;
margin-right: 20px;
margin-bottom: 20px;
}
.wrap li a {
display: block;
width: 100px;
height: 100px;
background-color: #ccc;
text-decoration: none;
}
.pop {
position: absolute;
left: 0;
top: 0;
box-sizing: border-box;
padding: 10px;
width: 100px;
border: 1px solid red;
background-color: #dec3f5;
display: none;
-webkit-transition: all .5s ease-in-out;
-ms-transition: all .5s ease-in-out;
transition: all .5s ease-in-out;
}
.pop .tri,
.pop .tri i {
position: absolute;
top: 4px;
left: -10px;
width: 0;
height: 0;
border-style: solid;
border-width: 8px 10px 8px 0;
border-color: transparent red transparent transparent;
}
.pop .tri i {
top: -8px;
left: 2px;
border-right-color: #dec3f5;
}
</style>
</head>
<body>
<pre>
说明：
1. hover 弹出悬浮框
2. 悬浮框跟随移动：延迟消失 + transition (IE10+)
3. 快速滑入时不出弹框：延迟显示
</pre>
<div class="wrap">
<ul class="clearfix">
<li><a href="#">鼠</a></li>
<li><a href="#">牛</a></li>
<li><a href="#">虎</a></li>
<li><a href="#">兔</a></li>
<li><a href="#">龙</a></li>
<li><a href="#">蛇</a></li>
<li><a href="#">马</a></li>
<li><a href="#">羊</a></li>
<li><a href="#">猴</a></li>
<li><a href="#">鸡</a></li>
<li><a href="#">狗</a></li>
<li><a href="#">猪</a></li>
</ul>
<div class="pop js-pop">
<div class="tri"><i></i></div>
移入区域：<span class="js-target"></span>
</div>
</div>
<pre>
知识点：
1. <em>位置</em>：position() offset()
2. 事件函数 <em>hover()</em>：mouseenter mouseleave
3. <em>鼠标事件</em>的顺序&冒泡：mouseenter mousein mouseout mouseover + 鼠标按下 抬起 单击 双击
4. 计时器：<em>setTimeout() clearTimeout()</em>，clear + 作用域
</pre>
<script src="http://s0.qhimg.com/lib/jquery/183.js"></script>
<script>
$(document).ready(function(){
var wrap = $('.wrap');
var pop = $('.js-pop'),
popInfo = pop.find('.js-target');
//延迟
var timer_hidden = null,
timer_show = null;
function clearTimers(){
timer_hidden && clearTimeout(timer_hidden);
timer_show && clearTimeout(timer_show);
}
function showPop(me){
// me.offset() me.position()
var pos = me.position(),
left = pos.left,
top = pos.top;
//console.log('left: ', left, ' top:', top);
popInfo.text(me.text());
pop.css('left', (left+110)+'px').css('top', (top+20)+'px').show();
}
function hidePop(delay){
clearTimers();
timer_hidden = setTimeout(function(){
pop.hide();
}, delay|0);
}
wrap.find('li').hover(function(e){
// console.log('item: mouseenter');
var me = $(this);
clearTimers();
//当要setTime传参时，不能me传参（那时候形参而已）不能带括号（直接执行了就），只能通过闭包来
timer_show = setTimeout(function(){
showPop(me);
}, 200);
}, function(e){
// console.log('item: mouseleave');
// hidePop(2000);
});
wrap.hover(function(e){
// console.log('wrap: mouseenter');
}, function(e){
// console.log('wrap: mouseleave');
// 移出整个区域后，弹框再消失
hidePop(500);
});
});
</script>
</body>
</html>