bootstrap 3.0 visible

Available classes

Use a single or combination of the available classes for toggling content across viewport breakpoints.

	Extra small devicesPhones (<768px)	Small devicesTablets (≥768px)	Medium devicesDesktops (≥992px)	Large devicesDesktops (≥1200px)
.visible-xs-*	Visible	Hidden	Hidden	Hidden
.visible-sm-*	Hidden	Visible	Hidden	Hidden
.visible-md-*	Hidden	Hidden	Visible	Hidden
.visible-lg-*	Hidden	Hidden	Hidden	Visible
.hidden-xs	Hidden	Visible	Visible	Visible
.hidden-sm	Visible	Hidden	Visible	Visible
.hidden-md	Visible	Visible	Hidden	Visible
.hidden-lg	Visible	Visible	Visible	Hidden

就是在 <br> 下 hidden-sm

比如說 hidden-xs 放在<br> 那麼就只有 sm 以上的裝置才會斷行