This tutorial shows you how to change the CSS file included into your page, using jQuery.
For example, if we have 2 CSS files, "style.css" and "style2.css", we can set a jQuery code to alternate the CSS included into our page, between these two files, when the user clicks on a specific element.
<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<title>Change CSS file</title>
<link href="style.css" rel="stylesheet" type="text/css" id="stl" />
<script type="text/javascript" src="jquery_library.js"></script>
<script type="text/javascript"><!--
// the CSS file is chosen according to the positive or negative value of this variable
var plusmin = 1;
$(document).ready(function() {
// when click on the element with id="idd"
$('#idd').click(function(){
plusmin *= -1; // change the polarity of "plusmin" var
var stl = plusmin>0 ? 'style.css' : 'style2.css'; // sets the css file, according to plusmin
// change the css file of the tag with id="stl" and rel="stylesheet"
$('#stl[rel=stylesheet]').attr('href', stl);
});
});
--></script>
</head>
<body>
<div id="idd"> Click here:<br />
Alternate the CSS file for this page<br />
Between "style.css" and "style2.css"</div>
<p class="hdp">This paragraph has display:none; in style2.css</p>
</body>
</html>
body { text-align: center; }
#idd {
width: 200px;
background: #a7efa8;
margin: 2px auto;
border: 2px solid blue;
padding: 5px 8px;
text-align: left;
font-size: 16px;
cursor: pointer;
}
#idd {
width: 300px;
margin: 2px auto 2px 80px;
background: #dadafe;
border: 2px dashed #a0cea1;
padding: 5px 8px;
font-size: 16px;
font-weight: bold;
text-align: center;
cursor: pointer;
}
p.hdp { display: none; }
This paragraph has display:none; in style2.css
<div>Web Programming and Development</div>
h2 {
text-decoration: underline;
}function someFunction() { alert("CoursesWeb.net"); }
setTimeout("someFunction()", 2000);$food =["fruits" =>["banana", "apple"), "veggie" =>["collard", "pea")); $nr_food = count($food, 1); echo $nr_food; // 6