immutable.js在react项目中的简单使用

immutable.jsimmutable可以将一个对象转为一个不可更改的对象。对 Immutable 对象的任何修改或添加删除操作都会返回一个新的 Immutable 对象。fromJSheader/store/reducer.js import { fromJS } from ‘immutable’; const defaultState = fromJS({ data: {}, list: [] }) export default (state = defaultState, action) => { switch (action.type) { case ‘change_data’: return state.set(“data”, action.data); case ‘change_all’: return state.merge({ list: action.data, data: action.data }); default: return state; } };index.js—–组件 const mapStateToProps = (state) => { return { // focused: state.get(“header”).get(“focused”) focused: state.getIn([‘header’, ‘data’]) } };store/reducer.js import { combineReducers } from “redux-immutable”; import { reducer as headerReducer } from ‘../common/header/store’; const reducer = combineReducers({ header: headerReducer }); export default reducer;