javascript get keys of object es6 code example

Example 1: change object key name javascript es6

const countries = [
    {"id": 1, "name": "Afghanistan"},
    {"id": 2, "name": "Albania"},
    {"id": 3, "name": "Algeria"},
    {"id": 4, "name": "American Samoa"}
];
const transformed = countries.map(({ id, name }) => ({ label: id, value: name }));
console.log(transformed);

Example 2: object keys javascript

const object1 = {
  a: 'somestring',
  b: 42,
  c: false
};

console.log(Object.keys(object1));
// expected output: Array ["a", "b", "c"]

Example 3: change object key name javascript es6

const countries = [
    {"id": 1, "name": "Afghanistan"},
    {"id": 2, "name": "Albania"},
    {"id": 3, "name": "Algeria"},
    {"id": 4, "name": "American Samoa"}
];
const transformed = countries.map(({ id: label, name: value }) => ({ label, value }));
console.log(transformed);