@intility/bifrost-react/dist/utils/getDuration.js

React library for Intility's design system, Bifrost.

// TypeScript is missing types for Intl.DurationFormat. should be fixed in:
// https://github.com/microsoft/TypeScript/issues/60608
// https://github.com/microsoft/TypeScript/pull/60646
// until then, reproduce relevant parts locally

/**
 * Construct a Duration object based on start and end dates. Used internally by `<FormatDuration>`
 * @param start Start date
 * @param end End date
 * @returns object with days, hours, or minutes meant to be used by `Intl.DurationFormat().format()`
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DurationFormat/format
 */
export default function getDuration(start, end) {
  const durationInMs = end.getTime() - start.getTime();
  const minutes = Math.round(durationInMs / 1000 / 60);
  const hours = minutes / 60;
  const days = hours / 24;
  if (days >= 2 || days <= -2) return {
    days: Math.round(days)
  };
  if (hours >= 2 || hours <= -2) return {
    hours: Math.round(hours)
  };
  return {
    minutes
  };
}