.includes with class

.js

if(this.props.indexes){
  //so props does exist
  if(i === 100){
      console.log(this.props.indexes.includes(i))
    //this is true
   }
      return(
        //yet this still does not add the class on 100
          <div className={`box ${(this.props.indexes.includes(i) ? 'backgroundColor' : '')}`}>
      </div>
        )
}