var today = new Date();
var dd = String(today.getDate()).padStart(2, '0');
var mm = String(today.getMonth() + 1).padStart(2, '0'); //January is 0!
var yyyy = today.getFullYear();
today = mm + '/' + dd + '/' + yyyy;
document.write(today);// yyyy-mm-dd
new Date().toISOString().slice(0, 10)let today = new Date()
today.toISOString().split('T')[0]// `date` is a `Date` object
const formatYmd = date => date.toISOString().slice(0, 10);
// Example
formatYmd(new Date()); // 2020-05-06var date_format = new Date();
document.write(innerHTML = date_format.getMonth()+'-'+ date_format.getDate()+'-'+date_format.getFullYear());const dateString = "2020-10-30T12:52:27+05:30"; // ISO8601 compliant dateString
const D = new Date(dateString);
const result = D.getDate()+"/"+(D.getMonth()+1)+"/"+D.getFullYear();
//output: 30/10/2020