Function offset

docs/app/js/sanddance-app.js:111377–111379

(ival, date, step)

    return utcIntervals[unit];
}
function offset(ival, date, step) {
    return ival ? ival.offset(date, step) : undefined;
}
function timeOffset(unit, date, step) {
    return offset(timeInterval(unit), date, step);
}