title: Get the current element?
body: <p>If I'm using something like this to set style:</p>
  
  <pre><code>&lt;div style={this.setStyle()}&gt;
  
    setStyle () {
      const style = {}
      if (this.state.fullScreen) {
        style.background = 'white'
        style.position = 'absolute'
        style.top = ???
      }
      return style
    }
  </code></pre>
  
  <p>How can I get the elements properties like <code>.offsetLeft</code> or <code>.scrollLeft</code> inside the funciton setStyle?</p>