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HTML DOM Select length Property
The HTML DOM select length property returns the number of <option> elements inside a drop-down list in an HTML document.
Syntax
Following is the syntax −
object.length
Example
Let us see an example of HTML DOM select length property −
<!DOCTYPE html>
<html>
<head>
<style>
html{
height:100%;
}
body{
text-align:center;
color:#fff;
background: linear-gradient(62deg, #FBAB7E 0%, #F7CE68 100%) center/cover no-repeat;
height:100%;
}
p{
font-weight:700;
font-size:1.2rem;
}
.drop-down{
width:35%;
border:2px solid #fff;
font-weight:bold;
padding:8px;
}
.btn{
background:#0197F6;
border:none;
height:2rem;
border-radius:2px;
width:35%;
margin:2rem auto;
display:block;
color:#fff;
outline:none;
cursor:pointer;
}
.show{
font-size:1.5rem;
font-weight:bold;
}
</style>
</head>
<body>
<h1>DOM Select length Property Demo</h1>
<p>Hi, Select your favourite subject:</p>
<select class='drop-down'>
<option>Physics</option>
<option>Maths</option>
<option>Chemistry</option>
<option>English</option>
</select>
<button onclick="showLength()" class="btn">Click to get number of options</button>
<div class="show"></div>
<script>
function showLength() {
var dropDown = document.querySelector(".drop-down");
var showMsg = document.querySelector(".show");
showMsg.innerHTML ="Number of options: " + dropDown.length;
}
</script>
</body>
</html>Output
This will produce the following output −
Click on the “Click to get number of options” button to get the number of options present in the drop-down list.
Updated on: 30-Jul-2019
182 Views
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