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files/en-us/web/xml/xslt/reference/element/when/index.md

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The <xsl:when> element always appears within an <xsl:choose> element, acting like a case statement.

Syntax

xml
<xsl:when test=EXPRESSION>
  TEMPLATE
</xsl:when>

Required Attributes

  • test
    • : Specifies a boolean expression to be evaluated. If true, the contents of the element are processed; if false, they are ignored.

Optional Attributes

None.

Type

Subinstruction, always appears within an <xsl:choose> element.

Specifications

XSLT, section 9.2.

Gecko support

Supported.