Bootstrap includes six predefined button styles, each serving its own semantic purpose.

Replace the default modifier classes with the .btn-outline-* ones to remove all background images and colors on any button.

Use class .btn-rounded for button round border.

Add icon in button.

Bootstrap includes six predefined button styles, each serving its own semantic purpose.

Bootstrap includes six predefined button styles, each serving its own semantic purpose.

Add .btn-lg or .btn-sm for additional sizes.

Add .w-xs, .w-sm, .w-md and .w-lg class for additional buttons width.

The .btn classes are designed to be used with the <button> element. However, you can also use these classes on <a> or <input> elements (though some browsers may apply a slightly different rendering).

Add data-bs-toggle="button" to toggle a button’s active state. If you’re pre-toggling a button, you must manually add the .active class and aria-pressed="true" to the <button>.

Create block level buttons—those that span the full width of a parent—by adding .btn-block.

Create button-like checkboxes and radio buttons by using .btn styles rather than .form-check-label on the <label> elements.

Wrap a series of buttons with .btn in .btn-group.

Combine sets of button groups into button toolbars for more complex components. Use utility classes as needed to space out groups, buttons, and more.

Instead of applying button sizing classes to every button in a group, just add .btn-group-* to each .btn-group, including each one when nesting multiple groups.

Make a set of buttons appear vertically stacked rather than horizontally. Split button dropdowns are not supported here.