NumberUtil.js

const NumberUtil = (function() {

    "use strict";

    function normalize(value, minimum, maximum) {

        return (value - minimum) / (maximum - minimum);
    }

    function interpolate(normValue, minimum, maximum) {
        return minimum + (maximum - minimum) * normValue;
    }

    function map(value, min1, max1, min2, max2) {
        return interpolate(normalize(value, min1, max1), min2, max2);
    }

    return {
        map,
        normalize,
        interpolate
    };
})();

export default NumberUtil;