Button.js

/************
OLD WAY
************/
<button className="btn btn-lg btn-success add-to-cart">
  <img src="/public/images/ic-check.svg" alt="" /> Vote
</button>

/************
NEW WAY: Button.js
************/
export default (props) => 
  <button className="btn {props.className}" style={props.style}>
    <img src="{props.icon}" alt="" /> {this.children}
  </button>

/************
USAGE
************/
import Button from './Button.js'

const App = () => <Button className="btn-lg btn-success add-to-cart" icon="/public/images/ic-check.svg">Vote</Button>

/************
UNIT TEST
************/