Use our low-level z-index utilities to quickly change the stack level of an element or component.

Automatically collapse navigation items into a "More" menu when space is limited using the Priority+ pattern.

Utilities for controlling font style including italic and normal styles.

Commonly asked questions about Bootstrap’s open source license. Bootstrap is released under the MIT license and is copyright 2025. Boiled down to smaller chunks, it can be described with the following ...

Approach Browser default checkboxes and radios are replaced with the help of .form-check, a series of classes for both input types that improves the layout and behavior of their HTML elements, that ...

Use our powerful mobile-first flexbox grid to build layouts of all shapes and sizes thanks to a twelve column system, six default responsive tiers, Sass variables and mixins, and dozens of predefined ...

The most basic list group is an unordered list with list items and the proper classes. Build upon it with the options that follow, or with your own CSS as needed. An item A second item A third item A ...

Use our powerful mobile-first flexbox grid to build layouts of all shapes and sizes thanks to a twelve column system, five default responsive tiers, Sass variables and mixins, and dozens of predefined ...

Selects Other than .form-control, floating labels are only available on .form-select s. They work in the same way, but unlike <input> s, they’ll always show the <label> in its floated state. Selects ...

Create consistent cross-browser and cross-device checkboxes and radios with our completely rewritten checks component.

Give textual form controls like <input>s and <textarea>s an upgrade with custom styles, sizing, focus states, and more.