How do you make a Textbox shake if Input is empty?

[Pralaya_Ranjan_Beher]

How do i make Shake a Textbox if Input is empty?

[Gordon_Lu]

Phase • Animations made easy!

Adding animations to apps made with App Inventor had never been an easy task. Also, there's nothing out there, like an extension, which would make it possible. That's why I thought of creating Phase, my first extension. Introducing Phase [image] Phase is a powerful yet easy-to-use animation extension. It makes it possible to animate any View/UI component on the screen. So, no matter if it's a simple label or a vertical arrangement containing a complex group of components, Phase …

[Pralaya_Ranjan_Beher]

Thank You

[ABG]

An extension-free approach would be to pad the text box left and right with blank Labels of different Widths, and use a Clock Timer to slosh the Width back and forth between the two neighboring Labels (like a NYC subway ride.)

[Pralaya_Ranjan_Beher]

Blocks please

[Kevinkun]

[Gordon_Lu]

It would be a good idea for learning to code blocks according to instructions. If you're just requesting for blocks you learn nothing.

[Pralaya_Ranjan_Beher]

I ll keep in mind sir.