I created a form using Bootstrap and I need that the outline of inputs of class "partIVAInput" becomes red and that red feedback message appears - not only when input are empty - but also when their value - checked by the "isValidPIVA(value)" function - is wrong. The handler of "keyup blur change" for the input with class "partIVAInput" checks if the value and assign accordingly the classes "is-valid/invalid" to the input.
<!doctype html>
<html lang="it">
<head>
<!-- Required meta tags -->
<meta charset="ISO-8859-15">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<!-- jQuery -->
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script>
$(function () {
$(".numericInput, .partIVAInput, .capInput").bind("keyup blur change", function (event) {
var value = $(this).val();
if ($(this).hasClass("partIVAInput"))
if (!isValidPIVA(value)) {
$(this).removeClass("is-valid").addClass("is-invalid");
}
else {
$(this).removeClass("is-invalid").addClass("is-valid");
}
});
});
//------------------------------------------------------------------------
function isValidPIVA(value) {
return (value === "123" ? true : false);
}
//------------------------------------------------------------------------
</script>
<title>Test</title>
</head>
<body>
<div class="container">
<form id="frmIscrCant" class="needs-validation" novalidate="">
<div id="divDatiCommittente" class="card bg-light">
<h5 class="card-header">Dati</h5>
<div class="card-body">
<div class="form-row">
<div class="form-group col-md-8">
<label for="tbEnte">Denominazione</label>
<input type="text" id="tbEnte" name="Ente" class="form-control" required="">
</div>
</div>
<div class="form-row">
<div class="form-group col-md-6">
<label for="tbPartIvaCommitt">Partita IVA</label>
<input type="text" id="tbPartIvaCommitt" name="PartIvaCommitt" class="form-control partIVAInput" required="">
<div class="invalid-feedback">Inserire una partita IVA valida (123)!</div>
</div>
</div>
</div>
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
</div>
<script>
// Example starter JavaScript for disabling form submissions if there are invalid fields
(function () {
'use strict';
window.addEventListener('load', function () {
// Fetch all the forms we want to apply custom Bootstrap validation styles to
var forms = document.getElementsByClassName('needs-validation');
// Loop over them and prevent submission
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);
})();
</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</body>
</html>
Perhaps I'm not handling things well since I'm experiencing the following problem.
When I insert in the field a right value (OK)...
When I insert in the field a wrong value (OK)...
When I submit with a wrong value in the field (NO!!! The feedback message is correctly displayed but the outline of the input has become green while it must be red. Also if I write a new wrong value in the field the outline of the input continues to be green. Further, the form is submitted while with a field marked as "is-invalid" I guess it shouldn't)...
What's wrong?
PS I created this new thread in replacement of this How can I validate a field using a JavaScript function? that can be closed/deleted.
