let products = [
  { name: "A", color: "Blue", size: 50 },
  { name: "B", color: "Blue", size: 60 },
  { name: "C", color: "Black", size: 70 },
  { name: "D", color: "Green", size: 50 },
];

// the value of each key is an array with the values to filter
let filters = {
  color: ["Blue", "Black"],
  size: [70, 50]
};

// filter the products array by color: blue and black
// and also by size: 70 and 50
var filtered = multiFilter(products, filters);

console.info('Filtered:');
console.log(filtered);

/* expected
[
  { name: "A", color: "Blue", "size": 50 },
  { name: "C", color: "Black", "size": 70 }
]
*/