reverse.js

const reverse = (data) => {
  if ( !data || !data.length) {
    return false
  }

  const length = data.length
  const reversed = data.split("").reverse().join("");

  for ( let index = 0; index < length / 2; index ++ )
  {
    if ( data[index] !== reversed[index] )
    {
      console.log("false")
      return false
    }
  }
  console.log("true")
  return true
}

reverse("racecar")