You must provide an `iconDescription` for the button tooltip.
### Icon-only, link button
### Icon-only button (custom tooltip position)
The tooltip position and alignment can be controlled by `tooltipPosition` and `tooltipAlignment`.
### Selected icon-only, ghost button
Set `isSelected` to `true` to enable the selected state for an icon-only, ghost button.
### Link button
If an `href` value is specified, the component will render an [anchor element](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/a) with a "button" role.
### Custom element
### Field size
### Small size
### Large size
### Extra-large size
### Disabled button
### Expressive styles
Set `expressive` to `true` to use Carbon's expressive typesetting.
Expressive styles only work with the default, `"lg"`, and `"xl"` button sizes.