JSFiddle - React, Tailwind, and code Playground

by Spokey

JavaScript

function formatDate() {
      var regEx = /^(0[1-9]|1[012])[\/](0[1-9]|[12][0-9]|3[01])[\/](19|20)\d\d$/;
      var test = "02/20/1901";
      var obj = $('.format');
      var febRexEx = /^(02)[\/](3[01])[\/](19|20)\d\d$/;
      if (test.match(regEx)) {
          alert("Matches Regular Expression 1.");
          if (test.match(febRexEx)) {
              alert("Bad date!\nMatches Regular Expression 2!");
          } else {
              alert("Not a bad date.\nDoesn't match Regular Expression 2.");
          }
      } else {
          alert("Bad date!\nDoesn't match Regular Expression 1!");
      }
  }

formatDate();