HarryDaamn

const result = [];

for (const k in obj) {
  if (obj.hasOwnProperty(k)) {
    result.push([ k, typeof obj[k] ]);
  }
}

const result = Object
  .entries(obj)
  .map(function(n) {
    return [ n[0], this(n[1]) ];
  }, x => x?.constructor.name ?? `${x}`);