image
开启定时器
- setInterval 【间隔性】一旦启动就不会停下来
- setTimeout【延时性】只执行一次
停止定时器
- clearInterval
- clearTimeout
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style media="screen">
#div1 {
width: 200px;
height: 30px;
background-color: red;
}
#div2 {
width: 150px;
height: 200px;
background-color: gray;
margin: 10px;
display: none;
}
</style>
</head>
<body>
<div id="div1"></div>
<div id="div2"></div>
<script type="text/javascript">
window.onload = function () {
var oDiv1 = document.getElementById('div1');
var oDiv2 = document.getElementById('div2');
var timer = null;
oDiv1.onmouseover = function () {
oDiv2.style.display = 'block'; //步骤1、鼠标移入div1.显示div2
clearTimeout(timer); //步骤6、
}
oDiv1.onmouseout = function () {
timer = setTimeout(function () { //步骤2、鼠标移除div1.延时 0.3s 消失div2
oDiv2.style.display = 'none';
},300);
}
oDiv2.onmouseover = function () {
oDiv2.style.display = 'block'; //步骤3、鼠标移入div2.显示Div2
clearTimeout(timer); //步骤4、清除步骤2.样式
}
oDiv2.onmouseout = function () {
timer = setTimeout(function () { //步骤5、鼠标移除div2.延时 0.3s 消失div2
oDiv2.style.display = 'none';
},300);
}
}
</script>
</body>
</html>
js部分最终简化代码为
<script >
window.onload = function () {
var oDiv1 = document.getElementById('div1');
var oDiv2 = document.getElementById('div2');
var timer = null;
oDiv1.onmouseover = oDiv2.onmouseover = function () {
oDiv2.style.display = 'block';
clearTimeout(timer);
}
oDiv1.onmouseout = oDiv2.onmouseout = function () {
timer = setTimeout(function () {
oDiv2.style.display = 'none';
},500);
}
}
</script>
jQuery写法
$CodeBox1.hover(function() {
$erwCode1.show(0)
$erwCode2.hide(0).stop(false,false);
}, function() {
$erwCode1.delay(500).hide(0)
});
$CodeBox2.hover(function() {
$erwCode2.show(0)
$erwCode1.hide(0).stop(false,false);
}, function() {
$erwCode2.delay(500).hide(0)
});
$erwCode1.hover(function() {
$erwCode1.show(0)
$erwCode2.hide(0).stop(false,false);
}, function() {
$erwCode1.hide(0)
});
$erwCode2.hover(function() {
$erwCode2.show(0)
$erwCode1.hide(0).stop(false,false);
}, function() {
$erwCode2.hide(0)
});