Format a date string

datetimestring.js

/*
  This function changes the datestring to the following format
  Jan 29 2018 - 09:51 AM
*/
function formatDate(dateString){
    const date = new Date(dateString);
    const hours = date.getHours() > 12 ? date.getHours() - 12 : date.getHours();
    return [ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" ][date.getMonth()] + ' '
        + (date.getDate() < 10 ? '0' + date.getDate() : date.getDate()) + ' '
        + date.getFullYear() + ' - '
        + (hours < 10 ? '0' + hours : hours) + ':'
        + (date.getMinutes() < 10 ? '0' + date.getMinutes() : date.getMinutes()) + ' '
        + (date.getHours() >= 12 ? 'PM' : 'AM');
}

console.log(formatDate('2018-01-29 16:21:39.901Z'));