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JS & DOM Reference

Overview

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Select length Property

Select Object

Definition and Usage

The length property returns the number of options in a dropdown list.

Syntax

selectObject.length=number

Browser Support

The length property is supported in all major browsers.

Example

Display the number of options in the dropdown list:

<html>
<head>
<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?</button>

</body>
</html>

Try it yourself »

Select Object