Jquery初体验
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Jquery初体验</title>
<script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
</head>
<body style="background:#000;">
<script type="application/javascript">
$(document).ready(function() {
$('.box').click(function(){
$('.box').css('border-radius','100px');
})
});
</script>
<div class="box" style="width:200px;height:200px; border:1px solid #ccc; background:#fff;">
正方形转圆球操作
</div>
</body>
</html>