javascript transform string to date short code example

Example 1: javascript format date yyyy-mm-dd

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

Example 2: string date to date in javascript

var ts = '1471793029764';
ts = Number(ts); // cast it to a Number
var date = new Date(ts); // works

var invalidDate = new Date('1471793029764'); // does not work. Invalid Date