Requirement step

[lilyMrt]

It would be great if Shepherd could support steps with requirements, which can be dynamically evaluated to display the appropriate step. Here is an example use case:

Step 1: Expand dropdown menu (requirement: menu is collapsed)
Step 1.5: Select menu option (requirement: menu is expanded)

If the state of the menu changes while on either step, it will trigger a change in the tour, going backward of forward as required.

Currently, this cannot be achieved with just advanceOn or showOn without external logic because the conditions are not re-evaluated, and there is no relationship between the two steps to make the tour go backward if the condition is no longer met.

[RobbieTheWagner]

@lilyMrt I think this is out of scope, but is definitely doable if you take control of the tour yourself using tour.next instead of relying on advanceOn.