How to return an object value whose key is provided as a function parameter?

Question

I’d like to know if it is possible to create a function that returns a field from an object given in parameter.

const data = {
  "name": "Doe",
  "firstName": "John",
  "age": 30,
  "from": "USA"
};

function returnField(field) {
  return data.field;
}

Answer 1

yes, its possible by using [] instead of .

data = {
 "name" : "doe",
 "firstname" : "jhon",
 "age" : 30,
 "from" : usa
 }

function returnField(field){
    return data[field]
}

In general you dont even need the function for it (unless you want to have more logic or some validation there) and just using data[field] directly.