getColonTimeFromDate

Returns a string of the form HH:MM:SS from a Date object.

• Use Date.prototype.toTimeString() and String.prototype.slice() to get the HH:MM:SS part of a given Date object.

const getColonTimeFromDate = date => date.toTimeString().slice(0, 8);

getColonTimeFromDate(new Date()); // '08:38:00'