I've built a simple InDesign file to test Show/Hide behavior with buttons and can't get it to work.
Step 1) I built a trigger object [a text box with a question] on layer 1, turned it into a button with an "On Click" event set to Show (Show/Hide) an overlapping object on layer 2. "On release" was also set to Hide (Show/Hide) the overlapping object on layer 2.
Step 2) Next, I built the overlapping object [a text box with an answer] on layer 2, turned it into a button with "Hidden Until Triggered" set to yes.
I tested this file as an interactive PDF, successfully. When the "question" text was clicked, the "answer" text on layer 2 "replaced" the old text by becoming visible and overlapping the question text on layer 1.
When I exported this same file to HTML5, only the layer 2 "answer" text is visible, and nothing is clickable. Is there a step/detail/workflow difference that I'm missing? Or is this a Click button behavior that isn't yet supported?