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Editorial Team
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Asked: 2026-06-01T12:37:24+00:00

I would like to attach an error to a formItem. In spark, it appears

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I would like to attach an error to a formItem. In spark, it appears that the standard way it is rendering on error on validation of a textInput, is bordering the textInput with red, placing a yellow alert icon next to the textInput and placing the error message in the formItem aligned to the right.

How does one do this manually for a custom formItem invalidation so that I can conform to error display?

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1 Answer

  1. Editorial Team

    Setting errorString on a FormItem will cause the error tooltip to appear when you hover over the FormItem.

    <mx:FormItem label="Pick some numbers!" x="10" y="10" errorString="Error!">
  <mx:CheckBox label="One"/>
  <mx:CheckBox label="Two"/>
  <mx:CheckBox label="Three"/>
</mx:FormItem>

    No hover:

    enter image description here

    Hover:

    enter image description here

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