Validation
Provide valuable, actionable feedback to your users with HTML5 form validation, via browser default behaviors or custom styles and JavaScript.
Forms validation on BootstrapCustom styles Example
<form class="row g-3 needs-validation" novalidate="">
<div class="col-md-4">
<label class="form-label" for="validationCustom01">First name</label>
<input class="form-control" id="validationCustom01" type="text" value="Mark" required="">
<div class="valid-feedback">Looks good!</div>
</div>
<div class="col-md-4">
<label class="form-label" for="validationCustom02">Last name</label>
<input class="form-control" id="validationCustom02" type="text" value="Otto" required="">
<div class="valid-feedback">Looks good!</div>
</div>
<div class="col-md-4">
<label class="form-label" for="validationCustomUsername">Username</label>
<div class="input-group has-validation">
<span class="input-group-text" id="inputGroupPrepend">@</span><input class="form-control" id="validationCustomUsername" type="text" aria-describedby="inputGroupPrepend" required="">
<div class="invalid-feedback">Please choose a username.</div>
</div>
</div>
<div class="col-md-6">
<label class="form-label" for="validationCustom03">City</label>
<input class="form-control" id="validationCustom03" type="text" required="">
<div class="invalid-feedback">Please provide a valid city.</div>
</div>
<div class="col-md-3">
<label class="form-label" for="validationCustom04">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 class="form-label" for="validationCustom05">Zip</label>
<input class="form-control" id="validationCustom05" type="text" 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" id="invalidCheck" type="checkbox" value="" required="">
<label class="form-check-label mb-0" for="invalidCheck">Agree to terms and conditions</label>
<div class="invalid-feedback mt-0">You must agree before submitting.</div>
</div>
</div>
<div class="col-12">
<button class="btn btn-primary" type="submit">Submit form</button>
</div>
</form>
Tooltips
<form class="row g-3 needs-validation" novalidate="">
<div class="col-md-4 position-relative">
<label class="form-label" for="validationTooltip01">First name</label>
<input class="form-control" id="validationTooltip01" type="text" value="Mark" required="">
<div class="valid-tooltip">Looks good!</div>
</div>
<div class="col-md-4 position-relative">
<label class="form-label" for="validationTooltip02">Last name</label>
<input class="form-control" id="validationTooltip02" type="text" value="Otto" required="">
<div class="valid-tooltip">Looks good!</div>
</div>
<div class="col-md-4 position-relative">
<label class="form-label" for="validationTooltipUsername">Username</label>
<div class="input-group"><span class="input-group-text" id="validationTooltipUsernamePrepend">@</span><input class="form-control" id="validationTooltipUsername" type="text" 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 class="form-label" for="validationTooltip03">City</label>
<input class="form-control" id="validationTooltip03" type="text" required="">
<div class="invalid-tooltip">Please provide a valid city.</div>
</div>
<div class="col-md-3 position-relative">
<label class="form-label" for="validationTooltip04">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 class="form-label" for="validationTooltip05">Zip</label>
<input class="form-control" id="validationTooltip05" type="text" 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>