Bootstrap Registration Form With Validation Codepen Code Example
Example: form validation javascript bootstrap < 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' ) ;