for example: [image] [image] i found in this code,it cannot reach the “else” part, when there is no input for the component at all… Can anyone why how to fix this problem(pls neglect the small pink rectangle,just for custom attributs test )? Thank you!

How to check has a input or not in custom component?

andrealu2012 (Andrealu2012) August 9, 2018, 8:02am 21

Thank you David.i understand.

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