Current zero-based step index.
Current step.
Completes the flow when the final step is valid.
Moves directly to a step; forward moves validate the current step.
Whether a previous step exists.
Whether the active step is the final step.
Validates and advances, or completes from the final step.
Moves back without validation.
Replaces callbacks and step definitions while preserving the active id when possible.
Validates the active step.
Framework-independent multi-step form state.