It it possible to bind to a component's property?

I'm sure your suggestion works, I wanted to avoid having to create a vm property. So I guess it is only possible to bind to the view model, not to properties of components? Currently I use: <textbox onChanging='buttonId.disabled = (event.value.length() == 0)' />

It should be a solution in Zscript but i never prefer it even in my company we already ban this Zscript