cuz/src/redux-loading-reducer.js

Front-end modular development kit.

const PREFIX = '[REQUEST]';

export default function reducer(state = { requests: [] }, action) {
  if (action.type && action.type.indexOf(PREFIX) === 0) {
    return {
      ...state,
      requests: [
        ...state.requests,
        action.type.replace(PREFIX, '')
      ]
    };
  }
  if (state.requests.indexOf(action.type) > -1) {
    return {
      ...state,
      requests: state.requests.filter((item) => item !== action.type)
    };
  }
  return state;
}