tabler/preview/pages/_includes/parts/form/validation-states.html

<div class="mb-3">
	<label class="form-label">Validation States {% if include.lite %}(lite){% endif %}</label>
	<input type="text" class="form-control is-valid{% if include.lite %} is-valid-lite{% endif %} mb-2" placeholder="Valid State..">
	<input type="text" class="form-control is-invalid{% if include.lite %} is-invalid-lite{% endif %}" placeholder="Invalid State..">
	{% unless include.lite %}<div class="invalid-feedback">Invalid feedback</div>{% endunless %}
</div>