JSFiddle - React, Tailwind, and code Playground
JavaScript
var today = new Date();
var dd = today.getDate();
var mm = today.getMonth()+1; //Январь это 0!
var yyyy = today.getFullYear();
if(dd<10){dd='0'+dd};
if(mm<10){mm='0'+mm};
var today = mm+'/'+dd+'/'+yyyy;
alert(today);