被选中的DIV框子
<!DOCTYPE html>
<html>
<head>
<title>被选中的DIV框子</title>
<script type="text/javascript" src="jquery-3.3.1.min.js"></script>
<style type="text/css">
p{
width: 100px;height: 100px;margin: 5px auto;border: 1px solid #888;border-radius: 5px;
}
</style>
</head>
<body>
<script type="text/javascript">
$(document).ready(function(){
//$('p[class]').css('background','red');
//$('p[class=kkk1]').css('font-size','30px');
//$('p[class!=kkk]').css('font-size','30px');
//$('p[class^=k]').css('background','red');
//$('p[class *=k ]').css('background','red');
$('p[class][id *=d]').css('background','red');
})
</script>
<p class="kkk">11</p>
<p class="kkk" id='dad'>11</p>
<p>22</p>
<p class="kkk" id='dfs'>11</p>
</body>
</html>