1.click事件
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>click事件</title>
<script type="text/javascript" src="jquery-1.12.4.min.js"></script>
<script type="text/javascript">
$(function () {
$('#btn').click(function () {
//重复切换sty样式
$('.box').toggleClass('sty');
});
})
</script>
<style type="text/css">
.box{
width:200px;
height:200px;
background-color: hotpink;
}
.sty{
background-color: chartreuse;
}
</style>
</head>
<body>
<input type="button" name="" value="切换" id="btn">
<div class="box"></div>
</body>
</html>