如何使用jQuery选择与给定ID匹配的单个元素？
要使用jQuery选择与给定ID匹配的单个元素，请使用元素ID选择器。就是这样，
$('#elementid')您可以尝试运行以下代码，以学习如何使用jQuery选择与给定ID匹配的单个元素-
示例
<html>
<head>
<title>Selector Example</title>
<script src = "https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
/* This would select second division only*/
$("#div2").css("background-color", "yellow");
});
</script>
</head>
<body>
<div class = "demo1" id = "div1">
<p>This is first division of the DOM.</p>
</div>
<div class = "demo2" id = "div2">
<p>This is second division of the DOM.</p>
</div>
<div class = "demo3" id = "div3">
<p>This is third division of the DOM</p>
</div>
</body>
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