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

[gordonlu310]

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 …