This program constructs a custom dual-range slider using the Canvas API, mapping DOM mouse event coordinates to the slider's internal value domain.
Prerequisite knowledge: Destructuring in JS, JavaScript classes, private fields, the Canvas API, DOM event handling, Pythagorean theorem for hit detection on the thumbs, Math methods (hypot, max, min), and the forEach array method.
File location: https://github.com/nurbs3000/septembe...