Forms and validation
Build labelled, accessible forms and wire Bootstrap validation states.
What you will be able to do
- Use form-label and an explicit for/id pair.
- Use form-control, form-select and form-check.
- Add invalid-feedback next to the field.
- Keep server-side validation regardless of client hints.
In plain English
Every control needs a label. Bootstrap styles the control, but the label association and the error text are your responsibility. Use invalid-feedback inside a wrapper and add .was-validated on submit or the .is-invalid class per field.
<form class="row g-3 needs-validation" novalidate>
<div class="col-md-6">
<label class="form-label" for="email">Email</label>
<input class="form-control" id="email" type="email" required>
<div class="invalid-feedback">Enter a valid email.</div>
</div>
<div class="col-12">
<button class="btn btn-primary" type="submit">Subscribe</button>
</div>
</form>Your turn
EasyAdd a required name field
Add a labelled name input with required validation and an invalid-feedback message.
HTML · starter
<div class="col-md-6">Check your understanding before moving on.
Knowledge checkQuestion 1
What does the invalid-feedback class do?
Select an answer to continue
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