Forum Discussion
Little Tip About Conditional Variables
Note: If there's any chance the user might return to the slide, your 1st trigger needs a condition.
Why? Because a “when timeline starts” triggers runs every time the user reaches the slide—even if the Slide Properties are set to “Resume saved state.”
Using your example, the condition would be if SlideComplete = False. Since the variable would be True if the user completed the interaction on a previous visit, Next would stay Normal in that situation.
For those who aren't familiar with variables, be aware that a variable maintains its value until a trigger changes it. So to control the Next button on multiple slides by tracking completion with a variable, you need to use a unique variable for each slide.
You're absolutely right — good catch. On a revisit, the timeline-starts trigger fires again and re-disables Next even though SlideComplete is still True. Adding "If SlideComplete == False" to that first trigger fixes it cleanly. And the per-slide unique variable point is worth underlining — one shared variable across slides is a classic way to get mysteriously unlocking Next buttons. Thanks for tightening this up.