js实现多维数组中查找指定元素的索引值

js实现多维数组中查找指定元素的索引值，代码如下：

const data = [
    [10, 12, [13, 55, [16]]],
    [21, 22, [24, 62]],
    [44, 45, 466, [47, [[48]]]]
];

function findOffset(arr, val, position) {
    var res = '';
    function _find (arr, val, position) {
        var temp = '';
        arr.forEach((item, index) => {
            temp = position ? position + ',' + index : index;
            if (item === val) {
                res = temp;
                return;
            } else if (item instanceof Array) {
                temp = _find(item, val, temp);
            }
        })
    }
    _find(arr, val, position);
    return res;
}

findOffset(data, 62);