Having class = “selected” depending on what page / URL is. This concept is very important especially when designing a navbar for a website so that visitors on the website know on which page of the site they are on
Approach: To have class=” selected” depending on what the current page/URL is :
- Write your HTML code.
- Write the CSS for the selected class.
- In javascript, Find the current location of your page using location.href .
- Now save all the a tags in a variable lets say “Items” using document.querySelector function.
- Iterate over the Items and compare its location with the current page URL.
- If the Items location matches with the current location of the page the add the current a tag class to the selected class.
Syntax:
const currentLocation = location.href
Example: This code should be pasted in all the 4 files.
HTML
<html>
<head>
<style>
a {
color: #000;
text-decoration: none;
}
.nav {
padding: 10px;
border: solid 1px #c0c0c0;
border-radius: 5px;
float: left;
}
.nav li {
list-style-type: none;
float: left;
margin: 0 10px;
}
.nav li a {
text-align: center;
width: 55px;
float: left;
}
.nav li a.selected {
background-color: green;
color: #fff;
font-weight: bold;
}
</style>
</head>
<body>
<ul class="nav">
<li><a href="home.html">Home</a></li>
<li>|</li>
<li><a href="gfg.html">GFG</a></li>
<li>|</li>
<li><a href="about.html">About</a></li>
<li>|</li>
<li><a href="contact.html">Contact</a></li>
</ul>
</body>
<script type="text/javascript">
const currentLocation = location.href;
const Items = document.querySelectorAll("a");
const Length = Items.length;
for (let i = 0; i < Items.length; i++) {
if (Items[i].href === currentLocation) {
Items[i].className = "selected";
}
}
</script>
</html>
|
Output: