index.md

---

title: function-available
slug: Web/XPath/Functions/function-available

---

{{ XsltRef() }}

The function-available function determines if a given function is available and returns boolean true or false.

Syntax

function-available( name )

Arguments

• name

  • : The name of the function to test.

Returns

Boolean true or false.

Defined

XSLT 1.0 15

Gecko support

Supported.