SOURCE

function myInstaceOf(left,right)
{
    let proto = left.__proto__;
    let prototype = right.prototype;
    while(true){
        if(proto === null) return false;
        if(prototype === proto) return true;
        proto = proto.__proto__;
    }
}

let arr = ["124","ege"];

let result  = myInstaceOf(arr,Object);
console.log(result)