How to Create a Filter List with Javascript

Learn how to create a filter list with JavaScript.


Filter List

How to use JavaScript to search for items in a list.


Create A Search List

Step 1) Add HTML:

CODE:

<input type=”text” id=”myInput” onkeyup=”myFunction()” placeholder=”Search for names..”>

<ul id=”myUL”>
<li><a href=”#” class=”header”>A</a></li>
<li><a href=”#”>Adele</a></li>
<li><a href=”#”>Agnes</a></li>

<li><a href=”#” class=”header”>B</a></li>
<li><a href=”#”>Billy</a></li>
<li><a href=”#”>Bob</a></li>

<li><a href=”#” class=”header”>C</a></li>
<li><a href=”#”>Calvin</a></li>
<li><a href=”#”>Christina</a></li>
<li><a href=”#”>Cindy</a></li>
</ul>

Note: We use href=”#” in this demo since we do not have a page to link it to. In real life this should be a real URL to a specific page.


Step 2) Add CSS:

Style the input element and the list:

CODE:

#myInput {
background-image: url(‘/css/searchicon.png’); /* Add a search icon to input */
background-position: 10px 12px; /* Position the search icon */
background-repeat: no-repeat; /* Do not repeat the icon image */
width: 100%; /* Full-width */
font-size: 16px; /* Increase font-size */
padding: 12px 20px 12px 40px; /* Add some padding */
border: 1px solid #ddd; /* Add a grey border */
margin-bottom: 12px; /* Add some space below the input */
}#myUL {
/* Remove default list styling */
list-style-type: none;
padding: 0;
margin: 0;
}

#myUL li a {
border: 1px solid #ddd; /* Add a border to all links */
margin-top: -1px; /* Prevent double borders */
background-color: #f6f6f6; /* Grey background color */
padding: 12px; /* Add some padding */
text-decoration: none; /* Remove default text underline */
font-size: 18px; /* Increase the font-size */
color: black; /* Add a black text color */
display: block; /* Make it into a block element to fill the whole list */
}

#myUL li a.header {
background-color: #e2e2e2; /* Add a darker background color for headers */
cursor: default; /* Change cursor style */
}

#myUL li a:hover:not(.header) {
background-color: #eee; /* Add a hover effect to all links, except for headers */
}


Step 3) Add JavaScript:

CODE:

<script>
function myFunction() {
// Declare variables
var input, filter, ul, li, a, i;
input = document.getElementById(‘myInput’);
filter = input.value.toUpperCase();
ul = document.getElementById(“myUL”);
li = ul.getElementsByTagName(‘li’);// Loop through all list items, and hide those who don’t match the search query
for (i = 0; i < li.length; i++) {
a = li[i].getElementsByTagName(“a”)[0];
if (a.innerHTML.toUpperCase().indexOf(filter) > -1) {
li[i].style.display = “”;
} else {
li[i].style.display = “none”;
}
}
}
</script>

Tip: Remove toUpperCase() if you want to perform a case-sensitive search.

FULL CODE:

CODE:

<!DOCTYPE html>
<html>
<head>
<style>
* {
box-sizing: border-box;
}

#myInput {
background-image: url(‘/css/searchicon.png’);
background-position: 10px 12px;
background-repeat: no-repeat;
width: 100%;
font-size: 16px;
padding: 12px 20px 12px 40px;
border: 1px solid #ddd;
margin-bottom: 12px;
}

#myUL {
list-style-type: none;
padding: 0;
margin: 0;
}

#myUL li a {
border: 1px solid #ddd;
margin-top: -1px; /* Prevent double borders */
background-color: #f6f6f6;
padding: 12px;
text-decoration: none;
font-size: 18px;
color: black;
display: block
}

#myUL li a.header {
background-color: #e2e2e2;
cursor: default;
}

#myUL li a:hover:not(.header) {
background-color: #eee;
}
</style>
</head>
<body>

<h2>My Phonebook</h2>

<input type=”text” id=”myInput” onkeyup=”myFunction()” placeholder=”Search for names..” title=”Type in a name”>

<ul id=”myUL”>
<li><a href=”#” class=”header”>A</a></li>
<li><a href=”#”>Adele</a></li>
<li><a href=”#”>Agnes</a></li>

<li><a href=”#” class=”header”>B</a></li>
<li><a href=”#”>Billy</a></li>
<li><a href=”#”>Bob</a></li>

<li><a href=”#” class=”header”>C</a></li>
<li><a href=”#”>Calvin</a></li>
<li><a href=”#”>Christina</a></li>
<li><a href=”#”>Cindy</a></li>
</ul>

<script>
function myFunction() {
var input, filter, ul, li, a, i;
input = document.getElementById(“myInput”);
filter = input.value.toUpperCase();
ul = document.getElementById(“myUL”);
li = ul.getElementsByTagName(“li”);
for (i = 0; i < li.length; i++) {
a = li[i].getElementsByTagName(“a”)[0];
if (a.innerHTML.toUpperCase().indexOf(filter) > -1) {
li[i].style.display = “”;
} else {
li[i].style.display = “none”;

}
}
}
</script>

</body>
</html>


Leave a Reply

Your email address will not be published. Required fields are marked *

WordPress spam blocked by CleanTalk.

This site uses Akismet to reduce spam. Learn how your comment data is processed.