Form Validation
Custom styles
Custom feedback styles apply custom colors, borders,
focus styles, and background
icons to better communicate feedback. Background icons for
<select>s are only available with
.form-select, and not .form-control.
<form class="needs-validation" novalidate>
<div class="mb-3">
<label class="form-label" for="validationCustom01">First name</label>
<input type="text" class="form-control" id="validationCustom01" placeholder="First name" value="Mark" required>
<div class="valid-feedback">
Looks good!
</div>
</div>
<div class="mb-3">
<label class="form-label" for="validationCustom02">Last name</label>
<input type="text" class="form-control" id="validationCustom02" placeholder="Last name" value="Otto" required>
<div class="valid-feedback">
Looks good!
</div>
</div>
<div class="mb-3">
<label class="form-label" for="validationCustomUsername">Username</label>
<div class="input-group">
<span class="input-group-text" id="inputGroupPrepend">@</span>
<input type="text" class="form-control" id="validationCustomUsername" placeholder="Username"
aria-describedby="inputGroupPrepend" required>
<div class="invalid-feedback">
Please choose a username.
</div>
</div>
</div>
<div class="mb-3">
<label class="form-label" for="validationCustom03">City</label>
<input type="text" class="form-control" id="validationCustom03" placeholder="City" required>
<div class="invalid-feedback">
Please provide a valid city.
</div>
</div>
<div class="mb-3">
<label class="form-label" for="validationCustom04">State</label>
<input type="text" class="form-control" id="validationCustom04" placeholder="State" required>
<div class="invalid-feedback">
Please provide a valid state.
</div>
</div>
<div class="mb-3">
<label class="form-label" for="validationCustom05">Zip</label>
<input type="text" class="form-control" id="validationCustom05" placeholder="Zip" required>
<div class="invalid-feedback">
Please provide a valid zip.
</div>
</div>
<div class="mb-3">
<div class="form-check">
<input type="checkbox" class="form-check-input" id="invalidCheck" required>
<label class="form-check-label form-label" for="invalidCheck">Agree to terms
and conditions</label>
<div class="invalid-feedback">
You must agree before submitting.
</div>
</div>
</div>
<button class="btn btn-primary" type="submit">Submit form</button>
</form>
Tooltips
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.
<form class="needs-validation" novalidate>
<div class="position-relative mb-3">
<label class="form-label" for="validationTooltip01">First name</label>
<input type="text" class="form-control" id="validationTooltip01" placeholder="First name" value="Mark" required>
<div class="valid-tooltip">
Looks good!
</div>
<div class="invalid-tooltip">
Please enter first name.
</div>
</div>
<div class="position-relative mb-3">
<label class="form-label" for="validationTooltip02">Last name</label>
<input type="text" class="form-control" id="validationTooltip02" placeholder="Last name" value="Otto" required>
<div class="valid-tooltip">
Looks good!
</div>
<div class="invalid-tooltip">
Please enter last name.
</div>
</div>
<div class="position-relative mb-3">
<label class="form-label" for="validationTooltipUsername">Username</label>
<div class="input-group">
<span class="input-group-text" id="validationTooltipUsernamePrepend">@</span>
<input type="text" class="form-control" id="validationTooltipUsername" placeholder="Username"
aria-describedby="validationTooltipUsernamePrepend" required>
<div class="invalid-tooltip">
Please choose a unique and valid username.
</div>
</div>
</div>
<div class="position-relative mb-3">
<label class="form-label" for="validationTooltip03">City</label>
<input type="text" class="form-control" id="validationTooltip03" placeholder="City" required>
<div class="invalid-tooltip">
Please provide a valid city.
</div>
</div>
<div class="position-relative mb-3">
<label class="form-label" for="validationTooltip04">State</label>
<input type="text" class="form-control" id="validationTooltip04" placeholder="State" required>
<div class="invalid-tooltip">
Please provide a valid state.
</div>
</div>
<div class="position-relative mb-3">
<label class="form-label" for="validationTooltip05">Zip</label>
<input type="text" class="form-control" id="validationTooltip05" placeholder="Zip" required>
<div class="invalid-tooltip">
Please provide a valid zip.
</div>
</div>
<button class="btn btn-primary" type="submit">Submit form</button>
</form>