JAVASCRIPT

null value check in react js

//if can't be used in jsx file under div hence use ternary operator ?:
// also it needs to be in {}
// typeof is optional
render(){
return(
          <div>
          {
             (typeof x !=='undefined' && typeof x.item !=='undefined')?
                <div>success</div>:           
                   <div>fail</div>
                </div>
          }
       )
}