JSFiddle - React, Tailwind, and code Playground

by Peter Aad

HTML

<input id="date-of-birth" value="06-01-1923" type="text">

JavaScript

var $dobInput = $("#date-of-birth");
var dobValue = $dobInput.val();
var chunks = dobValue.split('-');
var formattedDate = chunks[1]+'-'+chunks[0]+'-'+chunks[2];
$dobInput.val(formattedDate);