jQuery(document).on('ready', function($) {
    "use strict";

    window.addEventListener('load', function() {
       var forms = document.getElementsByClassName('needs-validation');
       var validation = Array.prototype.filter.call(forms, function(form) {
         form.addEventListener('submit', function(event) {
           if (form.checkValidity() === false) {
             event.preventDefault();
             event.stopPropagation();
           }
           form.classList.add('was-validated');
         }, false);
       });
     }, false);

}(jQuery)); // End jQuery