A quick way to mock api call.

mock_api.js

const fakeDatabase = option => {
  // add case according to the option. 
  switch (option) {
    case 1:
      return [{
        name: 'James Bond Singh',
        age: 41
      }, {
        name: 'Beauty Kumar',
        age: 12
      }]
    case 2:
      return {
        name: 'Beauty Kumar',
        age: 12,
        hobbies: ['Talking', 'Sleeping']
      }
    default:
      return []
  }
}

const delay = ms => new Promise(resolve => setTimeout(resolve, ms));
// api call mocking server latency
const fakeApiCall = option =>
  delay(2000).then(() => {
    return fakeDatabase(option)
  });

fakeApiCall(1).then(result => console.log(result));