.btn-flat / &.disabled / &.btn-lg / &.btn-sm

.btn-contained / &.disabled / &.btn-lg / &.btn-sm

.btn-outlined / &.disabled / &.btn-lg / &.btn-sm

&.btn-prev / &.btn-next

&.btn-left.btn-icon-left / &.btn-icon-right

.btn-black / &.disabled /