Use a classes btn btn-default to quickly create a general btn.

Use a classes btn btn-rounded to quickly create a rounded btn.

Use a class btn btn-outline to quickly create a outline btn.

Use a classes btn btn-outline btn-rounded to quickly create a outline rounded btn.

Use a class disabled to quickly create a disabled btn.

Just add icon in i tag and text in span tag.

Use a class btn-lg for large button, btn-sm for small button, btn-xs for mini button.

Use a class btn btn-link.

Use a class btn-link.

class btn-transparent.

Use a class btn-block to quickly create a block btn.

Just add icon in i tag and add dropup class for dropup.

Just add icon in i tag and text in span tag.

Class btn-anim. Just add icon in i tag and text in span tag.

Just add class btn-square to btn-icon-anim for square button and for sizes add btn-lg and btn-sm classes.

Just add class btn-circle to btn-icon-anim for circle button and for sizes add btn-lg and btn-sm classes.

Just add class btn-square and respective social icon class for square button and for sizes add btn-lg and btn-sm classes.

Just add class btn-circle and respective social icon class for circle button and for sizes add btn-lg and btn-sm classes.

Just add class btn-group btn-group-vertical for vertical group button.