Exercise: Build an Auction System

Task

Imagine you're building an online auction platform where participants can join, place bids, and leave as the auction progresses. This exercise will challenge you to use event-driven programming to simulate the auction, implementing features such as registering listeners for each participant, dynamically removing listeners when participants leave, and tracking active bidders in real time.

You’ll program the auctioneer to announce the start of the auction, manage bids, and clean up listeners when the auction ends. As participants interact, their actions will trigger events, ...