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#### Forms Validation

#### Browser defaults

Show Code

Not interested in custom validation feedback messages or writing JavaScript to change form behaviors? All good, you can use the browser defaults. Try submitting the form below. Depending on your browser and OS, you’ll see a slightly different style of feedback.While these feedback styles cannot be styled with CSS, you can still customize the feedback text through JavaScript.

First name
Last name
Username
@
City
State
Zip
Agree to terms and conditions

    <form class="row g-3">
        <div class="col-md-4">
            <label for="validationDefault01" class="form-label">First name</label>
            <input type="text" class="form-control" id="validationDefault01" value="Mark" required>
        </div>
        <div class="col-md-4">
            <label for="validationDefault02" class="form-label">Last name</label>
            <input type="text" class="form-control" id="validationDefault02" value="Otto" required>
        </div>
        <div class="col-md-4">
            <label for="validationDefaultUsername" class="form-label">Username</label>
            <div class="input-group">
                <span class="input-group-text" id="inputGroupPrepend2">@</span>
                <input type="text" class="form-control" id="validationDefaultUsername" aria-describedby="inputGroupPrepend2"
                    required>
            </div>
        </div>
        <div class="col-md-6">
            <label for="validationDefault03" class="form-label">City</label>
            <input type="text" class="form-control" id="validationDefault03" required>
        </div>
        <div class="col-md-3">
            <label for="validationDefault04" class="form-label">State</label>
            <select class="form-select" id="validationDefault04" required>
                <option selected disabled value="">Choose...</option>
                <option>...</option>
            </select>
        </div>
        <div class="col-md-3">
            <label for="validationDefault05" class="form-label">Zip</label>
            <input type="text" class="form-control" id="validationDefault05" required>
        </div>
        <div class="col-12">
            <div class="form-check">
                <input class="form-check-input" type="checkbox" value="" id="invalidCheck2" required>
                <label class="form-check-label" for="invalidCheck2">
                    Agree to terms and conditions
                </label>
            </div>
        </div>
        <div class="col-12">
            <button class="btn btn-primary" type="submit">Submit form</button>
        </div>
    </form>

#### Custom Styles

Show Code

For custom Bootstrap form validation messages, you’ll need to add the `novalidate` boolean attribute to your `<form>`. This disables the browser default feedback tooltips, but still provides access to the form validation APIs in JavaScript. Try to submit the form below; our JavaScript will intercept the submit button and relay feedback to you. When attempting to submit, you’ll see the `:invalid` and `:valid` styles applied to your form controls.

First name
Looks good!
Last name
Looks good!
Username
@
Please choose a username.
City
Please provide a valid city.
State
Please select a valid state.
Zip
Please provide a valid zip.
Agree to terms and conditions
You must agree before submitting.

    <form class="row g-3 needs-validation" novalidate>
        <div class="col-md-4">
            <label for="validationCustom01" class="form-label">First name</label>
            <input type="text" class="form-control" id="validationCustom01" value="Mark" required>
            <div class="valid-feedback">
                Looks good!
            </div>
        </div>
        <div class="col-md-4">
            <label for="validationCustom02" class="form-label">Last name</label>
            <input type="text" class="form-control" id="validationCustom02" value="Otto" required>
            <div class="valid-feedback">
                Looks good!
            </div>
        </div>
        <div class="col-md-4">
            <label for="validationCustomUsername" class="form-label">Username</label>
            <div class="input-group has-validation">
                <span class="input-group-text" id="inputGroupPrepend">@</span>
                <input type="text" class="form-control" id="validationCustomUsername" aria-describedby="inputGroupPrepend"
                    required>
                <div class="invalid-feedback">
                    Please choose a username.
                </div>
            </div>
        </div>
        <div class="col-md-6">
            <label for="validationCustom03" class="form-label">City</label>
            <input type="text" class="form-control" id="validationCustom03" required>
            <div class="invalid-feedback">
                Please provide a valid city.
            </div>
        </div>
        <div class="col-md-3">
            <label for="validationCustom04" class="form-label">State</label>
            <select class="form-select" id="validationCustom04" required>
                <option selected disabled value="">Choose...</option>
                <option>...</option>
            </select>
            <div class="invalid-feedback">
                Please select a valid state.
            </div>
        </div>
        <div class="col-md-3">
            <label for="validationCustom05" class="form-label">Zip</label>
            <input type="text" class="form-control" id="validationCustom05" required>
            <div class="invalid-feedback">
                Please provide a valid zip.
            </div>
        </div>
        <div class="col-12">
            <div class="form-check">
                <input class="form-check-input" type="checkbox" value="" id="invalidCheck" required>
                <label class="form-check-label" for="invalidCheck">
                    Agree to terms and conditions
                </label>
                <div class="invalid-feedback">
                    You must agree before submitting.
                </div>
            </div>
        </div>
        <div class="col-12">
            <button class="btn btn-primary" type="submit">Submit form</button>
        </div>
    </form>

#### Supported Elements

Show Code

Block-level or inline-level form text can be created using `.form-text`.

Textarea
Please enter a message in the textarea.
Check this checkbox
Example invalid feedback text
Toggle this radio
Or toggle this other radio
More example invalid feedback text
Example invalid select feedback
Example invalid form file feedback

        <form class="was-validated">
            <div class="mb-3">
                <label for="validationTextarea" class="form-label">Textarea</label>
                <textarea class="form-control" id="validationTextarea" placeholder="Required example textarea"
                    required></textarea>
                <div class="invalid-feedback">
                    Please enter a message in the textarea.
                </div>
            </div>

            <div class="form-check mb-3">
                <input type="checkbox" class="form-check-input" id="validationFormCheck1" required>
                <label class="form-check-label" for="validationFormCheck1">Check this checkbox</label>
                <div class="invalid-feedback">Example invalid feedback text</div>
            </div>

            <div class="form-check">
                <input type="radio" class="form-check-input" id="validationFormCheck2" name="radio-stacked" required>
                <label class="form-check-label" for="validationFormCheck2">Toggle this radio</label>
            </div>
            <div class="form-check mb-3">
                <input type="radio" class="form-check-input" id="validationFormCheck3" name="radio-stacked" required>
                <label class="form-check-label" for="validationFormCheck3">Or toggle this other radio</label>
                <div class="invalid-feedback">More example invalid feedback text</div>
            </div>

            <div class="mb-3">
                <select class="form-select" required aria-label="select example">
                    <option value="">Open this select menu</option>
                    <option value="1">One</option>
                    <option value="2">Two</option>
                    <option value="3">Three</option>
                </select>
                <div class="invalid-feedback">Example invalid select feedback</div>
            </div>

            <div class="mb-3">
                <input type="file" class="form-control" aria-label="file example" required>
                <div class="invalid-feedback">Example invalid form file feedback</div>
            </div>

            <div class="mb-3">
                <button class="btn btn-primary" type="submit" disabled>Submit form</button>
            </div>
        </form>

#### Tooltips

Show Code

If your form layout allows it, you can swap the `.{valid|invalid}-feedback` classes for `.{valid|invalid}-tooltip` classes to display validation feedback in a styled tooltip. Be sure to have a parent with `position: relative` on it for tooltip positioning. In the example below, our column classes have this already, but your project may require an alternative setup.

First name
Looks good!
Last name
Looks good!
Username
@
Please choose a unique and valid username.
City
Please provide a valid city.
State
Please select a valid state.
Zip
Please provide a valid zip.

        <form class="row g-3 needs-validation" novalidate>
            <div class="col-md-4 position-relative">
                <label for="validationTooltip01" class="form-label">First name</label>
                <input type="text" class="form-control" id="validationTooltip01" value="Mark" required>
                <div class="valid-tooltip">
                    Looks good!
                </div>
            </div>
            <div class="col-md-4 position-relative">
                <label for="validationTooltip02" class="form-label">Last name</label>
                <input type="text" class="form-control" id="validationTooltip02" value="Otto" required>
                <div class="valid-tooltip">
                    Looks good!
                </div>
            </div>
            <div class="col-md-4 position-relative">
                <label for="validationTooltipUsername" class="form-label">Username</label>
                <div class="input-group has-validation">
                    <span class="input-group-text" id="validationTooltipUsernamePrepend">@</span>
                    <input type="text" class="form-control" id="validationTooltipUsername"
                        aria-describedby="validationTooltipUsernamePrepend" required>
                    <div class="invalid-tooltip">
                        Please choose a unique and valid username.
                    </div>
                </div>
            </div>
            <div class="col-md-6 position-relative">
                <label for="validationTooltip03" class="form-label">City</label>
                <input type="text" class="form-control" id="validationTooltip03" required>
                <div class="invalid-tooltip">
                    Please provide a valid city.
                </div>
            </div>
            <div class="col-md-3 position-relative">
                <label for="validationTooltip04" class="form-label">State</label>
                <select class="form-select" id="validationTooltip04" required>
                    <option selected disabled value="">Choose...</option>
                    <option>...</option>
                </select>
                <div class="invalid-tooltip">
                    Please select a valid state.
                </div>
            </div>
            <div class="col-md-3 position-relative">
                <label for="validationTooltip05" class="form-label">Zip</label>
                <input type="text" class="form-control" id="validationTooltip05" required>
                <div class="invalid-tooltip">
                    Please provide a valid zip.
                </div>
            </div>
            <div class="col-12">
                <button class="btn btn-primary" type="submit">Submit form</button>
            </div>
        </form>

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