Button

Flat buttons

<Button>Default</Button>
<Button dense>Dense</Button>
<Button compact>Compact</Button>

Raised buttons

<Button raised>Default</Button>
<Button raised dense>Dense</Button>
<Button raised compact>Compact</Button>

Handle click

<Button
  raised 
  onClick={()=>{
    let { counter } = this.state;
    counter ++;
    this.setState({ counter });
  }}
>
  Increment
</Button>