regex for date mm/dd/yyyy in javascript code example

Example 1: javascript format date yyyy-mm-dd

let today = new Date()
today.toISOString().split('T')[0]

Example 2: javascript date format mm/dd/yyyy

var date_format = new Date();

document.write(innerHTML = date_format.getMonth()+'/'+ date_format.getDate()+'/'+date_format.getFullYear());