lavkach3

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// Example starter JavaScript for disabling form submissions if there are invalid fields
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(function () {
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  "use strict";
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  window.addEventListener(
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    "load",
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    function () {
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      // Fetch all the forms we want to apply custom Bootstrap validation styles to
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      var forms = document.getElementsByClassName("needs-validation");
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      // Loop over them and prevent submission
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      var validation = Array.prototype.filter.call(forms, function (form) {
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        form.addEventListener(
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          "submit",
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          function (event) {
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            if (form.checkValidity() === false) {
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              event.preventDefault();
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              event.stopPropagation();
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            }
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            form.classList.add("was-validated");
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          },
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          false
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        );
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      });
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    },
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    false
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  );
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})();
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