vuex存储数据的几种方法实例详解

import Vue from "vue"
import Vuex from "vuex"
Vue.use(Vuex)
const state = {
 id:null,
 code:null,
 
}
const mutations = {
  //保存数据
  CHANGE_ACTIVE_LI(state, { id, code }) {
    state.id = id
    state.code = code
  },
   //清除数据
   SET_CLEAR_DATA(state,data){
    state.id=data
  }
}
const actions = {
  //保存数据
  changeSetting({ commit }, data) {
    commit('CHANGE_ACTIVE_LI', { id: data.id, code: data.code })
  },
  //清除数据
  clearVuex({ commit }) {
    commit("SET_CLEAR_DATA", null);
  },
 
}
export default {
  //解决模块名冲突
  namespaced: true,
  state,
  mutations,
  actions
 

 next() {
 //这里的product/changeSetting是指定vuex中的方法，我这里指定把后面的对象加在prouduct中changeSetting方法里面去
      this.$store.dispatch("product/changeSetting", {
        id: this.id,
        code: this.code,
      });
    },

//取出vuex中proudct.js中的id的值
  this.id = this.$store.state.product.id;

// 将this.pickerItem的数据存储入insuranceCode,需提前转化成string类型
localStorage.setItem("insuranceCode", JSON.stringify(this.pickerItem));
sessionStorage.setItem("insuranceCode", JSON.stringify(this.pickerItem));

 JSON.parse(localStorage.getItem("insuranceCode"));
JSON.parse(sessionStorage.getItem("insuranceCode"));

// 清除insuranceCode
localStorage.removeItem("insuranceCode");
sessionStorage.removeItem("insuranceCode");
// 清除所有
localStorage.clear();
sessionStorage.clear();