Use MIDI Keyboard with Virtual Javascript piano on chrome

I want to use my MIDI keyboard with an online javascript piano. The JS piano currently only takes computer keyboard inputs. How can I give MIDI inputs via my MIDI keyboard? The piano: http://sahilbatla.com/piano-learner/javascript-piano/index.html The code for piano: https://github.com/sahilbathla/piano-learner

Do I need to add a plugin? Or do I need to change the code?