开启JavaScript中整数的范围[重复]

这是我想出的另一种方法：

const x = this.dealer;switch (true) {    case (x < 5):        alert("less than five");        break;    case (x < 9):        alert("between 5 and 8");        break;    case (x < 12):        alert("between 9 and 11");        break;    default:        alert("none");        break;}