title: Use calc function in CSS in JS in React component
body: <p>I am working on one react component in which I need to use calc function in styles</p>
  
  <pre><code>const styles = {
    spotImg:{
      maxWidth:"100%",
      maxHeight:"100%"
    },
    spotCont:{
      width: /*here want to use calc with screen width*/
    }
  }
  </code></pre>
  
  <p>I want to use screen width with calc function in the above style code in react js component.</p>