var keepDecimalPlacesBy = function (v, dp=2) {
    if (isNaN(v * 1)) return v;
    v = v.toString();
    var parts = v.split('.');
    console.log(parts);
    if (parts) {
        switch (parts.length) {
            case 1:
                return v;
            case 2:
                let p2 = parts[1].length > dp ? parts[1].substr(0, 2) : parts[1];
                return parts[0] + '.' + p2;

            default:
                return v;
        }
    }
    return v;
};