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// "12/22/2017"
new Intl.DateTimeFormat().format(new Date(2017, 11, 22));

// With custom locale

// "22/12/2017"
new Intl.DateTimeFormat('en-GB').format(new Date(2017, 11, 22));

// Customize the formatting 

const options = {
  year: 'numeric', month: 'numeric', day: 'numeric',
  hour: 'numeric', minute: 'numeric', second: 'numeric',
  hour12: false,
  timeZone: 'America/Los_Angeles' 
};
// "12/19/2012, 19:00:00"
new Intl.DateTimeFormat('en-US', options).format(date);