Cascading Form Inputs

**Cascading Inputs** connect multiple dropdown inputs so one dropdown dynamically filters the choices in the next.

For example, selecting a "Region" dropdown populates a "Host" dropdown with only hosts in that region. This is typically done by referencing the first input's token inside the second input's search.

This creates a seamless drill-down experience for dashboard users.

index=main region=$selected_region$ | dedup host | table host