Reverse integer - typescript - 80ms/100ms

Reverse_integer.ts

function reverse(x: number): number {
    const nums: string[] = [...(x.toString())];
    const list: number[] = [];
    const negative: boolean = nums[0] == '-' ? true : false;
    if (negative) nums[0] = "\0";
    nums.reverse().map(digit => {
        if (digit == "\0") return;
        list.push(Number(digit));
    })
    const result = Number(negative ? '-' + list.join('') : list.join(''));
    if (result > 2 ** 31 || result < -(2 ** 31)) return 0;
    else return result;
}

console.log(reverse(-123456));