<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>jQuery通配选择器</title>
<script type="text/javascript" src="js/jquery-3.3.1.min.js"></script>
<script type="text/javascript">
$(function(){
// $('*').css('backgroundColor','red');
var all = document.getElementsByTagName('*');
for (var i = 0; i < all.length; i++) {
all[i].style.backgroundColor = 'red';
}
});
</script>
</head>
<body>
<div>header</div>
<div>banner</div>
<div>content</div>
<div>footer</div>
<span>note</span>
</body>
</html>