spectrum/shared/time-formatting.js

// @flow

export const convertTimestampToDate = (timestamp: number) => {
  let monthNames = [
    'January',
    'February',
    'March',
    'April',
    'May',
    'June',
    'July',
    'August',
    'September',
    'October',
    'November',
    'December',
  ];
  let date = new Date(timestamp);
  let day = date.getDate();
  let monthIndex = date.getMonth();
  let month = monthNames[monthIndex];
  let year = date.getFullYear();
  let hours = date.getHours() || 0;
  let cleanHours;
  if (hours === 0) {
    cleanHours = 12; // if timestamp is between midnight and 1am, show 12:XX am
  } else {
    cleanHours = hours > 12 ? hours - 12 : hours; // else show proper am/pm -- todo: support 24hr time
  }
  let minutes = date.getMinutes();
  minutes = minutes >= 10 ? minutes : '0' + minutes.toString(); // turns 4 minutes into 04 minutes
  let ampm = hours >= 12 ? 'pm' : 'am'; // todo: support 24hr time
  return `${month} ${day}, ${year} at ${cleanHours}:${minutes}${ampm}`;
};

export const convertTimestampToTime = (timestamp: Date) => {
  let date = new Date(timestamp);
  let hours = date.getHours() || 0;
  let cleanHours;
  if (hours === 0) {
    cleanHours = 12; // if timestamp is between midnight and 1am, show 12:XX am
  } else {
    cleanHours = hours > 12 ? hours - 12 : hours; // else show proper am/pm -- todo: support 24hr time
  }
  let minutes = date.getMinutes();
  minutes = minutes >= 10 ? minutes : '0' + minutes.toString(); // turns 4 minutes into 04 minutes
  let ampm = hours >= 12 ? 'pm' : 'am'; // todo: support 24hr time
  return `${cleanHours}:${minutes}${ampm}`;
};