Making a Joystick With HTML (pure JavaScript) : 12 Steps - Instructables
HTML5 Canvas
Clear Touch Chorus software for education collaboration
Controlling the Canvas with JavaScript | by Dr Abstract | Medium
GitHub - bobboteck/JoyStick: A simple JoyStick that use HTML5, Canvas and Vanilla JavaScript, for touch and mouse interfaces (no JQuery required), preview at:
Archived | Handling user input in HTML5 Canvas-based games - IBM Developer