CODEWITHSUNDEEP
javascriptjquerytwitter-bootstrapvalidationbootstrap-4
Matthew
Matthew

Reputation: 4056

Bootstrap 4 Form Validation with Javascript /jQuery

I am new to web development, and am trying to set up a practice form to learn form validation. I am following Bootstrap's doc for Custom Styles to handle those with accessibility issues that use screen readers, and to standardize the validation appearance to users across different browsers.

I have set up a basic form as well as am trying to create a JavaScript function using jQuery to handle the validation. I feel like I am almost there, but still do not have the validation working as the Bootstrap demo displays.

index.html

<form id="signup-form" novalidate>

  <div class="form-group">
    <h1>Sign Up</h1>
    <p>Use this form to enter your name and email to sign up.</p>
  </div>

  <!-- Name -->
  <div class="form-group">
    <div class="row">
      <div class="col">
        <label for="firstNameInput">Name</label>
        <input type="text" class="form-control" id="firstNameInput" placeholder="First name" required>
        <div class="valid-feedback">
          Looks good!
        </div>
      </div>
      <div class="col">
        <label for="lastNameInput">Last</label>
        <input type="text" class="form-control" id="lastNameInput" placeholder="Last name" required>
        <div class="valid-feedback">
          Looks good!
        </div>
      </div>
    </div>
  </div>

  <!-- Email -->
  <div class="form-group">
    <label for="emailAddressInput">Email address</label>
    <input type="email" class="form-control" id="emailAddressInput" aria-describedby="emailHelp" placeholder="[email protected]" required>
    <small id="emailHelp" class="form-text text-muted">We'll never share your email with anyone else.</small>
    <div class="invalid-feedback">
      Please provide a valid email.
    </div>
  </div>

  <!-- Options -->
  <div class="form-group">
    <div class="form-check">
      <input class="form-check-input" type="radio" name="Radios" id="type1RadioButton" value="option1" checked>
      <label class="form-check-label" for="type1RadioButton">
        Type 1 user
      </label>
    </div>
    <div class="form-check">
      <input class="form-check-input" type="radio" name="Radios" id="type2RadioButton" value="option2">
      <label class="form-check-label" for="type2RadioButton">
        Type 2 user
      </label>
    </div>
  </div>

  <!-- Submit Button -->
  <div class="form-group">
    <a href="#" class="btn btn-primary" id="submitButton" type="submit">Submit</a>
  </div>

</form>

script.js

$(document).ready(function() {
  $("#submitButton").click(function() {

    //Fetch form to apply custom Bootstrap validation
    var form = $("#signup-form")
    //alert(form.prop('id')) //test to ensure calling form correctly

    if (form.checkValidity() === false) {
      event.preventDefault()
      event.stopPropagation()
    }
    form.addClass('was-validated')
  })
})

Upvotes: 3

Views: 22832

Answers (1)

Carol Skelly
Carol Skelly

Reputation: 362390

The problem is that checkValidity() exists on the first form node, not the form.

Change this: form.checkValidity() === false

to this: form[0].checkValidity() === false

and it works: https://www.codeply.com/go/pUPBLzn6yL

$(document).ready(function() {
  $("#submitButton").click(function() {

    //Fetch form to apply custom Bootstrap validation
    var form = $("#signup-form")
    alert(form.prop('id')) //test to ensure calling form correctly

    if (form[0].checkValidity() === false) {
      event.preventDefault()
      event.stopPropagation()
    }
    form.addClass('was-validated');

    //Make ajax call here

  })
})


More on Bootstrap 4 Validation:
Can't make the validation work in Bootstrap 4

Upvotes: 12

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