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https://issues.apache.org/jira/browse/TAP5-2000?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Howard M. Lewis Ship closed TAP5-2000.
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Resolution: Cannot Reproduce
Please re-open with a test case attached.
> empty element causes 'unbalanced elements' exception
> ----------------------------------------------------
>
> Key: TAP5-2000
> URL: https://issues.apache.org/jira/browse/TAP5-2000
> Project: Tapestry 5
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.3.3
> Reporter: Paul Stanton
>
> consider the following TML markup:
> <col t:type="if" t:test="myTest"></col>
> If 'myTest' is true, I want to render an empty <col> element, if it is false
> render nothing.
> TRUE: [<col></col>]
> FALSE: []
> however the above markup causes this exception:
> Caused by: org.apache.tapestry5.ioc.internal.util.TapestryException:
> Component MyPage:mycomponent.if_4 has rendered unbalanced elements; either it
> has started an element with MarkupWriter.element() and not followed up with
> MarkupWriter.end(), or it has invoked MarkupWriter.end() without first
> invoking MarkupWriter.element(). [at
> classpath:com/me/components/MyComponent.tml, line 26]
> at
> org.apache.tapestry5.internal.structure.ComponentPageElementImpl$PostRenderCleanupPhase.render(ComponentPageElementImpl.java:441)
> at
> org.apache.tapestry5.internal.services.RenderQueueImpl.run(RenderQueueImpl.java:72)
> ... 81 more
> To work around, include any character (space) within the element:
> <col t:type="if" t:test="myTest"> </col>
> which renders:
> TRUE: [<col> </col>]
> FALSE: []
> I also imagine you could do:
> <t:if test="myTest"><col></col></t:if>
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