template-ivan/react/src/reducers/welcome.js

scaffold template

// @flow
import createReducer from './createreducer'
import type { GetData, Welcome } from '../actions/welcome'

const ini: Welcome = 'Hello world!'
/**
 * 更新App helloworld数据
 *
 * @param {Welcome} state
 * @param {GetData} action
 * @returns {Welcome}
 */
function getData(state: Welcome, action: GetData): Welcome {
  return action.payload
}

export default createReducer(ini, {
  GETDATA: getData,
})