const State = { UNDETERMINED: 0, FAILED: 1, BEGAN: 2, CANCELLED: 3, ACTIVE: 4, END: 5, }; State.print = state => { const keys = Object.keys(State); for (let i = 0; i < keys.length; i++) { if (state === State[keys[i]]) { return keys[i]; } } }; export default State;