What is the best way to style Bootstrap 5 forms for validation feedback?

Asked on Jun 01, 2025

1 Answer

Bootstrap 5 provides built-in classes to style forms with validation feedback. You can use classes like `is-valid` and `is-invalid` to indicate the validation state of form fields.

<!-- BEGIN COPY / PASTE -->
        <form>
            <div class="mb-3">
                <label for="exampleInput" class="form-label">Email address</label>
                <input type="email" class="form-control is-invalid" id="exampleInput" aria-describedby="emailHelp">
                <div class="invalid-feedback">
                    Please enter a valid email address.
                </div>
            </div>
            <div class="mb-3">
                <label for="examplePassword" class="form-label">Password</label>
                <input type="password" class="form-control is-valid" id="examplePassword">
                <div class="valid-feedback">
                    Looks good!
                </div>
            </div>
        </form>
        <!-- END COPY / PASTE -->

Additional Comment:

Use the `is-invalid` class to highlight fields with errors, and pair it with a `
` containing the `invalid-feedback` class for error messages.
Use the `is-valid` class for fields that are correctly filled, along with `valid-feedback` for success messages.
Ensure that the feedback elements are placed immediately after the input fields they relate to for proper association.
Use `aria-describedby` to link input fields with their feedback messages for better accessibility.

✅ Answered with Bootstrap 5 best practices.

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