Indicate the current page’s location within a navigational hierarchy that automatically adds separators via CSS.
Fancy larger or smaller buttons? Add .btn-lg or .btn-sm for additional sizes.
Buttons will appear pressed (with a darker background, darker border, and
inset shadow) when active. There’s no need to add a class to <button>s as they use a
pseudo-class.
However, you can still force the same active appearance with .active (and include the
aria-pressed="true" attribute) should you need to replicate the
state
programmatically.
Make buttons look inactive by adding the disabled boolean attribute to any <button> element.
Add data-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>.