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TypeError: Cannot read property 'map' of undefined 
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  • Ganesan C

    Ganesan CPosted Aug 20, 2021, 9:03 AM

    You have to check null and length condition beofre going to loop.
     
    1. {  
    2.     this.state.emps && this.state.emps.length > 0 && this.state.emps.map(emp =>  
    3.       "foo">  
    4.         class="centered">{emp.points}  
    5.       
      
  •     )  
  •   }  
    • 0