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.
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.