I want to make the request filter option for location or/and sensorType return an empty string if any of them is null.

I'm using a select dropdown to change the values of filter.location and filter.sensorType

Expected output:

1. if filter.location is null but filter.sensorType is not null
   request = ...farms?sensortype=abc&page=3
2. if filter.location is not null but filter.sensorType is null
   request = ...farms?location=abc&page=3
3. if both are null
   requests = ...farms?page=3

My current result:

...farms?location=abc&undefined&page=3

const [filter, setFilter] = useState({
  sensorType: null,
  location: null,
});


// API REQUEST
const {
  data
} = await axios.get(
  `http://localhost:8080/api/farms?${
          filter.location && `location=${filter.location}`
        }${filter.sensorType && `&sensorType=${filter.sensorType}`}&page=${page}`
);