JS - 数字超过规定大小后面加上 “+”，例如：超过99，显示 99+

const outOfNum = (val, maxNum) => {
  val = val ? val - 0 : 0;
  if (val > maxNum) {
    return `${maxNum}+`;
  } else {
    return val;
  }
};
console.log(outOfNum(99)); // 99
console.log(outOfNum(99, 99)); // 99
console.log(outOfNum(100, 99)); // 99+