I’m using bootstrap 4 styling for my application. Application has two text boxes and one submit button. When you click the “Save” button it will call a web API and get some details asynchronously(it will not redirect the page). Validation applied for the first text box only.
(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); })();
<!DOCTYPE html> <html> <head> <!-- Required meta tags --> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></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> <!-- 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"> <title>Test Page</title> </head> <body> <form class="container needs-validation" novalidate> <div class="form-group row mt-5"> <label for="txtSessionDescription" class="col-2 col-md-2 col-sm-2 col-form-label">Name</label> <div class="col-sm-10"> <input type="tel" class="form-control" placeholder="Please enter your name" required /> <div class="invalid-feedback"> Please enter the name. </div> </div> </div> <div class="form-group row mt-5"> <label for="txtSessionDescription" class="col-2 col-md-2 col-sm-2 col-form-label">Address:</label> <div class="col-sm-10"> <input type="tel" class="form-control" /> </div> </div> <div class="form-group row"> <input type="submit" class="btn btn-primary" style="width: 100px;" value="Save" /> </div> </form> </body> </html>
My problem:
When I click the “Save” button without entering any values to the text boxes, green color style(validation true style) is applying to the “Address” textbox. I don’t wont that to happen.
I only need red color style(validation failed style) to be applied if the validation is failed. If the values are entered(validation is true), I don’t need any styling to be applied to the text boxes.
Also when I enter some value to the “Name” text box and click the “Save” button, I don’t want green color styling for that text box.
Screenshot:
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Answer
I, for one, do not like overriding the CSS style so you could also choose to just specify which fields to validate instead of the entire form.
Add a class to your .form-group
element (e.g. .validate-me
)
<form class="container needs-validation" novalidate> <div class="form-group row mt-5 validate-me"> <label for="txtSessionDescription" class="col-2 col-md-2 col-sm-2 col-form-label">Name</label> <div class="col-sm-10"> <input type="text" class="form-control" placeholder="Please enter your name" required /> <div class="invalid-feedback"> Please enter the name. </div> </div> </div> <div class="form-group row mt-5"> <label for="txtSessionDescription" class="col-2 col-md-2 col-sm-2 col-form-label">Address:</label> <div class="col-sm-10"> <input type="tel" class="form-control" formnovalidate="formnovalidate" id="address" /> </div> </div> <div class="form-group row"> <input type="submit" class="btn btn-primary" style="width: 100px;" value="Save"/> </div> </form>
Now change your JavaScript slightly, retrieve all the form-group
s with the validate-me
class and instead of calling form.classList.add('was-validated')
loop through all the captured form-groups and add was-validated
to them instead.
window.addEventListener('load', function () { // Fetch all the forms we want to apply custom Bootstrap validation styles to var forms = document.getElementsByClassName('needs-validation'); // Get all form-groups in need of validation var validateGroup = document.getElementsByClassName('validate-me'); // 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(); } //Added validation class to all form-groups in need of validation for (var i = 0; i < validateGroup.length; i++) { validateGroup[i].classList.add('was-validated'); } }, false); }); }, false);