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<!DOCTYPE html> <html lang="en"> <head> <title>Bootstrap 4 Form Needs Validation No Validate`</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/css/bootstrap.min.css" crossorigin="anonymous"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css"> <script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" crossorigin="anonymous"></script> <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js" crossorigin="anonymous"></script> <script src="https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/js/bootstrap.min.js" crossorigin="anonymous"></script> <style> body{ padding:15px; } </style> </head> <body> <div class="container"> <form class="needs-validation" novalidate> <div class="form-group"> <label for="email">Email</label> <input type="email" class="form-control" placeholder="Your email" required> <div class="valid-feedback"> Looks good! </div> <div class="invalid-feedback"> Please enter a valid email address. </div> </div> <div class="form-group"> <label for="password">Password</label> <input type="password" class="form-control" placeholder="Your password" required> <div class="valid-feedback"> Looks good! </div> <div class="invalid-feedback"> Please enter your password to validate. </div> </div> <div class="form-group form-check"> <input type="checkbox" class="form-check-input" name="rememberme" required> <label class="form-check-label">Agree to terms and conditions</label> <div class="invalid-feedback"> You must agree before submitting. </div> </div> <div class="form-group"> <button type="submit" class="btn btn-primary">Submit</button> </div> </form> <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> </div> </body> </html>
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