Piano Keys: Vanilla UI Interaction

I've created an interactive HTML document that implements a six-key piano (C, D, E, F, G, A) with independent mouse and keyboard handling, supporting simultaneous note activation and clean release behavior. Keyboard & Mouse Interaction This virtual piano responds to your keyboard presses and mouse clicks with clear visual feedback. Here's how the logic works and how you can play with it: Dual Input Handling: The system tracks keyboard-pressed notes and mouse-pressed notes in…