Confirm the Ending "FCC" Check if a string (first argument, str) ends with the given target string (second argument, target) without using .endsWith()

ConfirmTheEnding.js

function confirmEnding(str, target) {
  // "Never give up and good luck will find you."
  // -- Falcor
   var x = str.length - (target.length);
    if (str.substr(x, str.length) == target) {
      return true;
    } else {
      return false;
    }
  /*function confirmEnding(str, target) {
  return str.substr(-target.length) === target;
}*/   
  
}

confirmEnding("Bastian", "n");

Confirm the Ending freecodecamp.com exercise
"FCC" Check if a string (first argument, str) ends with the given target string (second argument, target) without using .endsWith()