<!DOCTYPE html>
<head>
<meta charset="UTF-8">
<title>jQuery id选择器</title>
<script type="text/javascript" src="js/jquery-3.3.1.js"></script>
<script type="text/javascript">
$(function(){
// $("#one");//它会返回一个jQuery对象
$("#one").show();//display:block
});
</script>
</head>
<body>
<div id="one" style="display:none;">Category: Selectors</div>
</body>
</html>
<!DOCTYPE html>
<head>
<meta charset="UTF-8">
<title>jQuery id选择器</title>
<script type="text/javascript" src="js/jquery-3.3.1.js"></script>
<script type="text/javascript">
$(function(){
// $("#one");//它会返回一个jQuery对象
// $("#one").show();//display:block
$("#one").text("jQuery");
});
</script>
</head>
<body>
<div id="one">Category: Selectors</div>
</body>
</html>
