id选择器 

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<script src="jquery/jquery-3.1.1.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){	//页面初始化函数
    $("#div1").css("background","red");	//匹配ID值为div1的元素，并设置其背景色为红色
})
</script>
<title></title>
</head>
<body>
<div id="div1">测试盒子</div>
</body>
</html>

有特殊符号

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<script src="jquery/jquery-3.1.1.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){ 
    $("#a\\.b").css("color","red");
    $("#a\\:b").css("color","red");
    $("#\\[div\\]").css("color","red");
})
</script>
<title></title>
</head>
<body>
<div id="a.b">div1</div>
<div id="a:b">div2</div>
<div id="[div]">div3</div>
</body>
</html>

用原生js代码

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<script src="jquery/jquery-3.1.1.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){
    document.getElementById("a.b").style.color = "red";
    document.getElementById("a:b").style.color = "red";
    document.getElementById("[div]").style.color = "red"; 
})
</script>
<title></title>
</head>
<body>
<div id="a.b">div1</div>
<div id="a:b">div2</div>
<div id="[div]">div3</div>
</body>
</html>
posted @ 2023-04-04 09:26  Bre-eZe  阅读(19)  评论(0)    收藏  举报