FloatButton floats over a corner of the page, with a default icon from your pack or your own icon and tooltip.type to primary or default, and shape to square, squircle for a smooth superellipse corner, or circle.content to put a short label on the button, with shape set to square so the text fits.tooltip a string for a quick label, or an object with title, color and placement like any Tooltip.badge a dot, a count, or a count with overflowCount to show a notification on the button.FloatButton.Group to stack them, and set shape on the group to shape every button in it.trigger to click to turn a group into a menu that opens from its button and closes with a close icon.trigger to hover to open the group's menu while the pointer rests on its button.open together with a trigger to control whether the group's menu is open, here from a switch.placement on a group with a trigger to open its menu upward, downward, to the left or to the right.FloatButton.BackTop to return to the top, with target for a scrolling container and showProgress for a progress ring.