As I discussed in my last post, I’ve worked with UI Actions to call UI Pages previously. However, during this most recent project, I was seeing odd behavior where when I would click on the UI Action, the page would be redirected to the page where the UI Page is defined rather than just staying on the current page and popping up a modal.
Even more surprisingly, when I hit the back button to go back to the form from which I’d click the UI Action, I would see the UI Page pop up as a modal.
As it turns out, this behavior is caused when you haven’t defined the UI Action in question as being client callable.
So, if you ever have a UI Action that is redirecting to the UI Page rather than displaying the pop-up, double check that you’ve clicked the ‘client’ box on the UI Action definition.