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XSLT function-available() Function

XSLT function-available() Function​

The function-available function returns a Boolean value that indicates whether the function specified is supported by the XSLT processor.

You may test the XSLT functions and the inherited XPath functions.

Syntax​

boolean function-available(string)

Input Parameters​

ParameterRequired/OptionalDescription
stringRequiredSpecifies the function to test

Example​

Check if sum() and current() functions are supported:

example.xsl
<?xml version="1.0"  encoding="UTF-8"?>  
<xsl:stylesheet version="1.0"  
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">  
  
<xsl:template match="/">  
    <html>  
        <body>  
        <xsl:choose>  
            <xsl:when test="function-available('sum')">  
                <p>sum() is supported.</p>  
            </xsl:when>  
            <xsl:otherwise>  
                <p>sum() is not supported.</p>  
            </xsl:otherwise>  
        </xsl:choose>  
        <xsl:choose>  
            <xsl:when test="function-available('current')">  
                <p>current() is supported.</p>  
            </xsl:when>  
            <xsl:otherwise>  
                <p>current() is not supported.</p>  
            </xsl:otherwise>  
        </xsl:choose>  
        </body>  
    </html>  
</xsl:template>  
  
</xsl:stylesheet>

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