Buttons
Examples
Bootstrap includes six predefined button styles,each serving its own semantic purpose.
Outline buttons
In need of a button,but not the hefty background colors they bring? Replace the default modifier classes with the .btn-outline-*ones to remove all background images and colors on any button.
Button tags
The .btnclasses 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).
Sizes
Fancy larger or smaller buttons? Add .btn-lgor .btn-smfor additional sizes.
Disabled Buttons
Make buttons look inactive by adding the disabled boolean attribute to any <button>element.
Disabled Link
Disabled buttons using the <a>element behave a bit different:
Block Buttons
Create block level buttons—those that span the full width of a parent—by adding .btn-block.
Toggle states
Add data-toggle="button"to toggle a button’s activestate. If you’re pre-toggling a button,you must manually add the .activeclass andaria-pressed="true"to the <button>.
Checkbox buttons
Bootstrap’s .buttonstyles can be applied to other elements,such as <label>s,to provide checkbox or radio style button toggling. Add data-toggle="buttons"to a .btn-groupcontaining those modified buttons to enable toggling in their respective styles.
Radio buttons
Bootstrap’s .buttonstyles can be applied to other elements,such as <label>s,to provide checkbox or radio style button toggling. Add data-toggle="buttons"to a .btn-groupcontaining those modified buttons to enable toggling in their respective styles.
Input With Button Groups
Feel free to mix input groups with button groups in your toolbars. Similar to the example above,you’ll likely need some utilities though to space things properly..
Button Groups
Place a .btn-groupwithin another .btn-groupwhen you want dropdown menus mixed with a series of buttons.Make a set of buttons appear vertically stacked rather than horizontally.
Icon With Label Buttons
A button variant for using icon with label.
Only Icon Buttons
A button variant for using only icons.