JSFiddle - React, Tailwind, and code Playground

JavaScript

function formatDate (input) {
      var datePart = input.match(/\d+/g),
      year = datePart[0].substring(2), // get only two digits
      month = datePart[1], day = datePart[2];
     return day+'/'+month+'/'+year;
    }
    alert(formatDate ('2010/01/18')); // "18/01/10"