bootstrap 4 form validator with jquery

To implement Bootstrap 4 form validation with jQuery, you can follow these steps:

  1. Include the necessary files:
  2. Add the Bootstrap CSS file in the head section of your HTML document: <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
  3. Add the jQuery library before the closing body tag: <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>

  4. Add the Bootstrap JavaScript file after the jQuery library: <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>

  5. Create a form with input fields:

  6. Define a form element and give it an ID or class for easy targeting: <form id="myForm">
  7. Add input fields with appropriate validation attributes, such as required, minlength, maxlength, pattern, etc.

  8. Optionally, you can add custom error messages using the data-error attribute.

  9. Apply the validation logic:

  10. Use jQuery to target the form and initialize the validation plugin: $('#myForm').validate();
  11. This will automatically apply the Bootstrap form validation behavior to your form.

  12. The validation plugin will validate the form based on the specified validation attributes and display error messages accordingly.

  13. Handle form submission:

  14. You can use the submitHandler option to define a function that will be executed when the form is successfully validated.
  15. For example, you can use AJAX to submit the form data to a server or perform any other desired action.

Here's a sample code snippet that demonstrates the implementation:

<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap Form Validation</title>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
</head>
<body>
  <form id="myForm">
    <div class="form-group">
      <label for="name">Name:</label>
      <input type="text" class="form-control" id="name" name="name" required>
    </div>
    <div class="form-group">
      <label for="email">Email:</label>
      <input type="email" class="form-control" id="email" name="email" required>
    </div>
    <button type="submit" class="btn btn-primary">Submit</button>
  </form>

  <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
  <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
  <script>
    $(document).ready(function () {
      $('#myForm').validate({
        submitHandler: function (form) {
          // Handle form submission here
          form.submit();
        }
      });
    });
  </script>
</body>
</html>

This code sets up a basic form with two fields, "Name" and "Email", and applies Bootstrap 4 form validation using the jQuery validation plugin. The form will not submit unless all required fields are filled out correctly.