xxxxxxxxxx1
<form class="row g-3 needs-validation m-5" novalidate>2
<div class="col-md-4">3
<div class="form-outline">4
<input type="text" class="form-control" id="validationCustom01" value="Mark" required />5
<label for="validationCustom01" class="form-label">First name</label>6
<div class="valid-feedback">Looks good!</div>7
</div>8
</div>9
<div class="col-md-4">10
<div class="form-outline">11
<input type="text" class="form-control" id="validationCustom02" value="Otto" required />12
<label for="validationCustom02" class="form-label">Last name</label>13
<div class="valid-feedback">Looks good!</div>14
</div>15
</div>16
<div class="col-md-4">17
<div class="input-group form-outline">18
<span class="input-group-text" id="inputGroupPrepend">@</span>19
<input type="text" class="form-control" id="validationCustomUsername" aria-describedby="inputGroupPrepend" required />20
<label for="validationCustomUsername" class="form-label">Username</label>21
<div class="invalid-feedback">Please choose a username.</div>22
</div>23
</div>24
<div class="col-md-6">25
<div class="form-outline">26
<input type="text" class="form-control" id="validationCustom03" required />27
<label for="validationCustom03" class="form-label">City</label>28
<div class="invalid-feedback">Please provide a valid city.</div>29
</div>30
</div>31
<div class="col-md-6">32
<div class="form-outline">33
<input type="text" class="form-control" id="validationCustom05" required />34
<label for="validationCustom05" class="form-label">Zip</label>35
<div class="invalid-feedback">Please provide a valid zip.</div>36
</div>37
</div>38
<div class="col-12">39
<div class="form-check">40
<input class="form-check-input" type="checkbox" value="" id="invalidCheck" required />41
<label class="form-check-label" for="invalidCheck">Agree to terms and conditions</label>42
<div class="invalid-feedback">You must agree before submitting.</div>43
</div>44
</div>45
</form>46
<button id="button" class="btn btn-primary mx-5">Submit form</button>47
1
1
xxxxxxxxxx1
// Example starter JavaScript for disabling form submissions if there are invalid fields2
(() => {3
'use strict';4
5
// Fetch all the forms we want to apply custom Bootstrap validation styles to6
const form = document.querySelector('.needs-validation');7
const btn = document.querySelector('button');8
9
btn.addEventListener('click', () => {10
// Creating the event11
const event = new Event('submit', {12
'bubbles': true,13
'cancelable': true14
});15
16
form.dispatchEvent( event );17
})18
19
form.addEventListener('submit', (event) => {20
if (!form.checkValidity()) {21
event.preventDefault();22
event.stopPropagation();23
}24
form.classList.add('was-validated');25
}, false);26
})(); Console errors: 0