Array Comparison Output Question

function compare(input) {
  return !!(input == 1 || input == 2 || input == 3);
}

console.log(compare(0));
console.log(compare(1));
console.log(compare(2));
console.log(compare(3));
console.log(compare(4));
console.log(compare([1]));
console.log(compare([2]));
console.log(compare([3]));