Various useful javascript date and time formats

dateTimeFormats.js

// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toLocaleTimeString

const startDate = new Date()
//2018-11-20T11:33:57.788Z

const yyyymmdd = startDate.toISOString().slice(0, 10);
//'2018-11-20'

const startTimeWithSeconds = startDate.toLocaleTimeString();
//'11:33:57 AM'

const startTimeWithoutSeconds = startDate.toLocaleTimeString([], {hour: '2-digit', minute:'2-digit'});
//'11:37 AM'

const fullStartTime = startDate.toLocaleTimeString([],{weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' });
//'Tuesday, November 20, 2018, 11:33:57 AM'

const fullStartDateWithoutTime=startDate.toLocaleDateString([],{ weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' })
//'Tuesday, November 20, 2018'