Select lengthProperty
Select Object
Definition and Usage
The length property returns the number of options in a drop-down list.
Syntax
selectObject.length=number
Browser Support
All major browsers support the length property.
Examples
Examples
Display the number of options in the drop-down list:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Example (example.com)</title>
<script>
function displayResult(){
alert(document.getElementById("mySelect").length);
}
</script>
</head>
<body>
<form>
<select id="mySelect">
<option>Apple</option>
<option>Pear</option>
<option>Banana</option>
<option>Orange</option>
</select>
</form>
<button type="button" onclick="displayResult()">How many options are in the drop-down list?</button>
</body>
</html>
<html>
<head>
<meta charset="utf-8">
<title>Example (example.com)</title>
<script>
function displayResult(){
alert(document.getElementById("mySelect").length);
}
</script>
</head>
<body>
<form>
<select id="mySelect">
<option>Apple</option>
<option>Pear</option>
<option>Banana</option>
<option>Orange</option>
</select>
</form>
<button type="button" onclick="displayResult()">How many options are in the drop-down list?</button>
</body>
</html>
Try it Yourself »
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