JSFiddle - React, Tailwind, and code Playground
HTML
<input type="month" id="monf">
JavaScript
function newDate() {
var vals = $('#monf').val().split('-');
var year = vals[0].substr(2,2);
var month = vals[1];
var date = month + '/' + year;
return date;
};
$('#monf').on('change', function() {
console.log(newDate());
});