HTMLOptionsCollection: length property

The length property of the HTMLOptionsCollection interface returns the number of <option> elements in the collection. The property can get or set the size of the collection.

When setting length to a value smaller than the current, the options collection gets truncated; otherwise, new blank <option> elements are appended to the end of the <select>.

Value

An integer value representing the number of items in this HTMLOptionsCollection.

Example

const optCollection = document.getElementById("fruits").options;
const origLength = optCollection.length;
optCollection.length += 50; // adds 50 blank options to the collection
optCollection.length = origLength; // truncates the list back to the original size

Specifications

Browser compatibility

See also

• HTMLOptionsCollection.add()
• HTMLOptionsCollection.remove()
• HTMLOptionsCollection.selectedIndex
• HTMLSelectElement
• HTMLOptGroupElement
• HTMLCollection.length