Fab stands for floating action button
It is a circular button that is mostly displayed in bottom right corner of the app with specific function.
The position can be changed using the position props to the left / center.
More custom effects such as color changes, icons, ripple effect can be added using various props that onsen offers with this component.
Example:
<Ons.Fab
style={{backgroundColor: ons.platform.isIOS() ? '#4182ab' : null}}
onClick={this.handleClick}
position='bottom left'>
<Ons.Icon icon='md-cloud' />
</Ons.Fab>