Get Mouse Click Position

I am using this color wheel, and I want to add a black cover overlay to the color wheel, this way when the hsv's value changes (the v) using the slider under the color wheel, the c

Solution 1:

Add this to the last script tag (just after var c = ...):

var w = document.getElementById('wrapper');

then You can get and substract the wrapper offset properties:

currentX = e.pageX - w.offsetLeft - c.offsetLeft - radiusPlusOffset || currentX;
currentY = e.pageY - w.offsetTop - c.offsetTop - radiusPlusOffset || currentY;