While these feedback styles cannot be styled with CSS, you can still customize the feedback text through JavaScript. Bootstrap 4 step credit card payment form with order details. Understanding the . For invalid fields, ensure that the invalid feedback/error message is associated with the relevant form field using aria-describedby (noting that this attribute allows more than one id to be referenced, in case the field already points to additional form text). Note that .invalid-feedback is also supported with these classes. Inline text can use any typical inline HTML element (be it a , , or something else) with nothing more than a utility class. Theyre built on top of semantic and accessible markup, so theyre solid replacements for any default form control. Compatible browsers: Chrome, Edge, Firefox, Opera, Safari Responsive: yes Dependencies: font-awesome.css Bootstrap version: 4.3.1 {valid|invalid}-tooltip classes to display validation feedback in a styled tooltip. Wrap a pair of and