Delegated Event Handler (H)

Challenge summary

Build a reusable delegated-event utility with selector matching, context preservation, and safe cleanup.

What you'll practice

• Call the handler with the matched element and original event.
• Reject matches that fall outside the delegated root.
• Make repeated cleanup calls safe and predictable.

What Premium unlocks

Premium unlocks the runnable workspace, behavioral checks, implementation walkthrough, and edge-case discussion.