Getting initial values of non-primitive types from another Javascript file?
So here's what I've ended up doing:

INITIAL_VALUES.js

function GET_FEATURE_TYPES_INITIAL_VALUES() {
  const FEATURE_TYPE_INITIAL_VALUES = {
    SINGLE_CHOICE: '',
    MULTIPLE_CHOICE: [],
    BOOLEAN: false,
    NUMBER: 0,
    STRING: ''
  };
  return FEATURE_TYPE_INITIAL_VALUES;
}

function GET_FILTER_TYPES_INITIAL_VALUES() {
  const FILTER_TYPE_INITIAL_VALUES = {
    NUMBER_RANGE_ALLOW_MULTIPLE: [],
    NUMBER_ACUM_RANGE_ALLOW_SINGLE: [],
    SINGLE_CHOICE_ALLOW_SINGLE: [],
    SINGLE_CHOICE_ALLOW_MULTIPLE: [],
    MULTIPLE_CHOICE_ALLOW_MULTIPLE: [],
    BOOLEAN_ALLOW_MULTIPLE: [],
    STRING_ALLOW_MULTIPLE: []
  };
  return FILTER_TYPE_INITIAL_VALUES;
}

function GET_FIELD_TYPES_INITIAL_VALUES() {
  const FIELD_TYPE_INITIAL_VALUES = {
    STRING_FIELD: '',
    BOOLEAN_FIELD: '',
    NUMBER_FIELD: 0,
    ARRAY_STRINGS_FIELD: [],
    ARRAY_OBJECTS_FIELD: [],
    OBJECT_FIELD: {}
  };
  return FIELD_TYPE_INITIAL_VALUES;
}

export {
  GET_FEATURE_TYPES_INITIAL_VALUES,
  GET_FILTER_TYPES_INITIAL_VALUES,
  GET_FIELD_TYPES_INITIAL_VALUES
};



SomeComponent.js

import { GET_FEATURE_TYPES_INITIAL_VALUES } from '@constants/INITIAL_VALUES';

function SomeComponent() {
  const FEATURE_TYPES_INITIAL_VALUES = GET_FEATURE_TYPES_INITIAL_VALUES();

  // FRESH NEW INITIAL_VALUES AVAILABLE ON EVERY RENDER
}