Jakarta > Tapestry
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When

Describes one of the alternatives to be chosen by the Choose component. The default alternative is described by the Otherwise component.
Must have Choose as an immediate parent and must appear before an Otherwise that has the same parent.

See also: Conditional, Choose, Otherwise

Parameters

Name Type Direction Required Default Description
condition boolean in no false The condition to test. If the expression evaluates to true, then its content is rendered.
element String in no   If specified, then the component acts like an Any, emitting an open and close tag. Informal parameters are applied to the tag. If no element is specified, informal parameters are ignored.

Body: allowed

Informal parameters: allowed

Reserved parameters: invert

Examples

Please see the documentation for the Choose component.