Current if/else statement not working correctly and I don't know why not

Question

My if/else statement recently keep giving me false even when it should return true.

See below my code:

const managerStatus = () =>{
  const theManager = "Nick Halding";
  console.log(theManager.length)
  let managerCondition;
  if(theManager.length<=0 || isNaN(theManager) || theManager === undefined){
    managerCondition=false
  }
  else{
    managerCondition=true
  }
  return managerCondition;
}

Can clearly see that the length of theManager is bigger than 0 and is not NaN but still return false. It should return true according to me