In jQuery, you can select multiple elements by separate it with a comma “,” symbol.
For example,
$(.class1, .class2, #id1)
In above case, select all elements that have a class name of “class1” and “class2”, and id of “id1”.
jQuery Example
In this example, the elements that have a class name of “p1” and “p2“, id of “div3” will be add a red border dynamically.
<html>
<head>
<title>Select mutiple elements example</title>
<script type="text/javascript" src="jquery-1.3.2.min.js"></script>
</head>
<script type="text/javascript">
$(document).ready(function(){
$(".p1, .p3, #div3").css("border", "2px solid red");
});
</script>
<body>
<h1>Select mutiple elements example</h1>
<p class="p1">P1</p>
<p class="p2">P2</p>
<p class="p3">P3</p>
<p class="p4">P4</p>
<div id="div1">DIV1</div>
<div id="div2">DI2</div>
<div id="div3">DI2</div>
<div id="div4">DI2</div>
</body>
</html>
For an intersection, just put the selectors together without spaces in between them. So, for an element that has an ID of a with classes b and c, you would write:
$(“#a.b.c”)
or
$(“.a”).filter(“.b”)
Get more details:
http://www.namasteui.com/select-element-with-multiple-classes/