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function-available()

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

XPath 1.0 15

Gecko support

Supported.

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/XPath/Functions/function-available