19 数组中三个值的最大乘积

<script>
        function maxzhi(nums) {
            nums = nums.sort((a, b) => b - a)
            var a = nums[0] * nums[1] * nums[2]
            var b = nums[nums.length - 1] * nums[nums.length - 2] * nums[0]
            if (a > b) {
                console.log(a)
                return a
            } else {
                console.log(b)
                return b
            }
        }
        var nums = [1,2,3,4,5,6,-5,-6]
        maxzhi(nums) 
    </script>