form validation javascript bootstrap

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Henri
22 Sep 2019
1<script>
2          // Example starter JavaScript for disabling form submissions if there are invalid fields
3          (function() {
4            'use strict';
5            window.addEventListener('load', function() {
6              // Fetch all the forms we want to apply custom Bootstrap validation styles to
7              var forms = document.getElementsByClassName('needs-validation');
8              // Loop over them and prevent submission
9              var validation = Array.prototype.filter.call(forms, function(form) {
10                form.addEventListener('submit', function(event) {
11                  if (form.checkValidity() === false) {
12                    event.preventDefault();
13                    event.stopPropagation();
14                  }
15                  form.classList.add('was-validated');
16                }, false);
17              });
18            }, false);
19          })();
20          </script>
source
Tommaso
07 Feb 2018
1<form>
2  <div class="form-row">
3    <div class="col-md-4 mb-3">
4      <label for="validationServer01">First name</label>
5      <input type="text" class="form-control is-valid" id="validationServer01" placeholder="First name" value="Mark" required>
6      <div class="valid-feedback">
7        Looks good!
8      </div>
9    </div>
10    <div class="col-md-4 mb-3">
11      <label for="validationServer02">Last name</label>
12      <input type="text" class="form-control is-valid" id="validationServer02" placeholder="Last name" value="Otto" required>
13      <div class="valid-feedback">
14        Looks good!
15      </div>
16    </div>
17    <div class="col-md-4 mb-3">
18      <label for="validationServerUsername">Username</label>
19      <div class="input-group">
20        <div class="input-group-prepend">
21          <span class="input-group-text" id="inputGroupPrepend3">@</span>
22        </div>
23        <input type="text" class="form-control is-invalid" id="validationServerUsername" placeholder="Username" aria-describedby="inputGroupPrepend3" required>
24        <div class="invalid-feedback">
25          Please choose a username.
26        </div>
27      </div>
28    </div>
29  </div>
30  <div class="form-row">
31    <div class="col-md-6 mb-3">
32      <label for="validationServer03">City</label>
33      <input type="text" class="form-control is-invalid" id="validationServer03" placeholder="City" required>
34      <div class="invalid-feedback">
35        Please provide a valid city.
36      </div>
37    </div>
38    <div class="col-md-3 mb-3">
39      <label for="validationServer04">State</label>
40      <input type="text" class="form-control is-invalid" id="validationServer04" placeholder="State" required>
41      <div class="invalid-feedback">
42        Please provide a valid state.
43      </div>
44    </div>
45    <div class="col-md-3 mb-3">
46      <label for="validationServer05">Zip</label>
47      <input type="text" class="form-control is-invalid" id="validationServer05" placeholder="Zip" required>
48      <div class="invalid-feedback">
49        Please provide a valid zip.
50      </div>
51    </div>
52  </div>
53  <div class="form-group">
54    <div class="form-check">
55      <input class="form-check-input is-invalid" type="checkbox" value="" id="invalidCheck3" required>
56      <label class="form-check-label" for="invalidCheck3">
57        Agree to terms and conditions
58      </label>
59      <div class="invalid-feedback">
60        You must agree before submitting.
61      </div>
62    </div>
63  </div>
64  <button class="btn btn-primary" type="submit">Submit form</button>
65</form>
source
Isidora
03 Jul 2017
1function form_validate(attr_id){
2    var result = true;
3    $('#'+attr_id).validator('validate');
4    $('#'+attr_id+' .form-group').each(function(){
5        if($(this).hasClass('has-error')){
6            result = false;
7            return false;
8        }
9    });
10    return result;
11}
12
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