javascript nested function call in reactjs render classname -

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function inside render statement not working. how call function part of classname? this._displaylogic().showatraffic() returning undefined.

expected result: classname ="up blue",

current result: "up " , an error in console.

class linestatus extends react.component{   constructor(props){     super(props);   }   _displaylogic=()=>{     var showatraffic=()=>{         return "blue";     };     var showbtraffic=()=>{         return "yellow";     };      console.log(showatraffic()+"....."); //this works.   }   componentwillmount(){   this._displaylogic();  }   render(){     return(         <div classname="status-content collapse" key={this.props.key}>           <div classname={"up "+this._displaylogic().showatraffic()}>             <row classname="show-grid">                 <span>approval</span>             </row>             <row classname="status-subcontent collapse">               line content goes here.             </row>           </div> )   } }

_displaylogic should return object when invoked e.g.

_displaylogic=()=>{   var showatraffic = () => 'blue'   var showbtraffic = () => 'yellow'   return {showatraffic, showbtraffic}; }

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