mm/dd/yyyy regex

index.html

<input type="text" id="date" placeholder="mm/dd/yyyy">
<button class="pressy">validate</button>

mm-dd-yyyy-regex.markdown

mm/dd/yyyy regex

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License.

script.js

/* following this stack overflow answer: https://stackoverflow.com/questions/15196451/regular-expression-to-validate-datetime-format-mm-dd-yyyy
   */
function validateDate(thedate) {
    var date_regex = /^(0[1-9]|1[0-2])\/(0[1-9]|1\d|2\d|3[01])\/(19|20)\d{2}$/ ;
    return date_regex.test(thedate);
}

document.addEventListener('click', function (event) {
	if (!event.target.matches('.pressy')) return;
	event.preventDefault();

  console.log(validateDate(document.getElementById("date").value));

}, false);