JSFiddle - React, Tailwind, and code Playground

by Jelgab

HTML

<h3>
Format Date 001
</h3>
<div id = "Resultados" />

JavaScript

//Format Date 001
function printResults( theValue ){
   $("#Resultados").append( theValue );
   $("#Resultados").append( $("<br/>") );
}

function formatDate(userDate) {
  var dateElements = userDate.split( "/" );
  return "" +
      ( "0000" + dateElements[2] ).slice( -4 )
    + ( "00"   + dateElements[0] ).slice( -2 )
    + ( "00"   + dateElements[1] ).slice( -2 );
}

console.clear();
printResults(formatDate("12/31/2014"));
printResults(formatDate("12/1/2014"));
printResults(formatDate("1/1/2014"));
printResults(formatDate("1/31/2014"));