[JavaScript] Filter array of objects by multiple params.

index.js

const arr = [
  {name: "Mikita", age: 1, city: "Hrodna"}, 
  {name: "Martin", age: 2, city: "Berlin"},
  {name: "Nikita", age: 3, city: "Hrodna"},
  {name: "Nikita", age: 4, city: "Hrodna"},
  {name: "Sasha",  age: 2, city: "Minsk"},
  {name: "Sasha",  age: 2, city: "Paris"},
  {name: "Sasha",  age: 2, city: "Hrodna"},
  {name: "Martin", age: 2, city: "Berlin"},
  {name: "Martin", age: 2, city: "London"},
  {name: "Mikita", age: 2, city: "London"},
]

const filters = { city: ["London", "Hrodna"]}



const result = arr.filter(item => {
  let shouldReturn = false;

  for (const filter in filters) {
    if (Array.isArray(filters[filter])) {
      if (filters[filter].indexOf(item[filter]) >= 0) {
          shouldReturn = true;
      } else {
          return undefined;
      }
    } else {
      if (item[filter] === filters[filter]) {
        shouldReturn = true;
    } else {
        shouldReturn = false;
      return undefined;
      }
    }
  }
  return shouldReturn && item
})

console.log(result)