JS用callback筛选数组中元素

const arr = [3,5,6,8,9,11,12,15,17]
const callback = (num) => num % 3 ===0;
let disvisibleByThree = null;
let doMath = () => {
    disvisibleByThree = arr.filter(callback);
};
doMath();
console.log(disvisibleByThree);
console.log("These numbers are divisible by 3")