JQ操作属性作业
学完此个篇章，才发现用JQ操作属性，也蛮方便的，掌握后能灵活运用，能做不少事情
<!doctype html>
<html>
<head>
<meta charset="gbk">
<title>JQ操作属性作业</title>
<script src="jquery-3.3.1.min.js"></script>
</head>
<style>
.box{background:#ccc;height:100px;width:100px}
.pox{background:red}
</style>
<script>
$('document').ready(function(){
$('div').addClass('box');
//$('div').removeClass('box');
$('.box2').css({"height":"100px","width":"100px","background":"red"});
//alert($('div').hasClass('box2'));
})</script>
<body>
<div></div>
<div></div>
<p>aaaaa</p>
<button onclick='to()'>按我变色</button>
</body>
<script>
function to(){
$('p').toggleClass('pox');
}
</script>
</html>