In this example I will show you how to add class and remove class using javascript. It can be achieved by using ClassName property. We can get all elements in the document with the specified tag name.
Here I passed TR tag to the method getElementByTagName () and it will returns collection of all elements with specified tag element as object. With the help of object length by looping we can identify the class name and replace it.
Example:
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#btnChange").click(function () {
var tr = document.getElementsByTagName("tr");
for (var i = 0; i < tr.length; i++) {
if (tr[i].className === 'highlight') {
tr[i].className = 'normal';
}
}
});
});
</script>
<style type="text/css">
td {
border-bottom:1px solid #808080;
}
.highlight {
background-color: #2a78ac;
color:white;
}
.normal {
background-color: #FFFCC9;
}
</style>
</head>
<body style="font-family: Arial; width: 500px;border:1px solid #e5dddd">
<table>
<tr class="highlight">
<td>Tiger Nixon</td>
<td>System Architect</td>
<td>Edinburgh</td>
<td>61</td>
</tr>
<tr>
<td>Garrett Winters</td>
<td>Accountant</td>
<td>Tokyo</td>
<td>63</td>
</tr>
<tr class="highlight">
<td>Ashton Cox</td>
<td>Junior Technical Author</td>
<td>San Francisco</td>
<td>42</td>
</tr>
<tr >
<td>Cedric Kelly</td>
<td>Senior Javascript Developer</td>
<td>Edinburgh</td>
<td>22</td>
</tr>
</table>
<button id="btnChange" >change</button>
</body>
</html>
Output:
But in jQuery it is very easy with single line of code. It reduces the large amount of code.
$("tr.highlight").removeClass("highlight").addClass("normal");
Post your comments / questions
Recent Article
- How to add two numbers in Android Studio? | Source Code
- FindViewByID returns null in android studio -SOLVED
- Saving changes is not permitted in SQL SERVER - [SOLVED]
- Restore of database failed. File cannot be restored over the existing. -[SOLVED]
- One or more projects in the solution were not loaded correctly in Visual Studio 2019 | FIXED
- How to find Laptop's Battery Health?
- SOLVED-Related Field got invalid lookup: icontains error in Django
- How to enable Search Feature in Django admin?
Related Article