Find the Max and Min element out of all the nested arrays in javascript

I have a array like so:

var arr = [[12,45,75], [54,45,2],[23,54,75,2]];

I want to find out the largest element and the smallest element out of all the elements in the nested array:

The min should be: 2

and

Max should be 75

I tried the functions below but they do not work:

    function Max(arrs)
    {
        if (!arrs || !arrs.length) return undefined;
        let max = Math.max.apply(window, arrs[0]), m,
            f = function(v){ return !isNaN(v); };
        for (let i = 1, l = arrs.length; i<l; i++) {
            if ((m = Math.max.apply(window, arrs[i].filter(f)))>max) max=m;
        }
        return max;
    }
    function Min(arrs)
    {
        if (!arrs || !arrs.length) return undefined;
        let min = Math.min.apply(window, arrs[0]), m,
            f = function(v){ return !isNaN(v); };
        for (let i = 1, l = arrs.length; i<l; i++) {
            if ((m = Math.min.apply(window, arrs[i].filter(f)))>min) min=m;
        }
        return min;
    }

It gives out Max as 75 and min as 12.

Any guidance will be appreciated.

Also tried other answers in SO but none help.

The answer at Merge/flatten an array of arrays in JavaScript? resolves the problem of merging arrays.

Whereas my problem is to keep the array as is and perform operations.

Assuming ES6

const arr = [[12,45,75], [54,45,2],[23,54,75,2]];

const max = Math.max(...[].concat(...arr));

const min = Math.min(...[].concat(...arr));

console.log(max);

console.log(min);