向Vuex存储对象添加新属性

// store.js

import Vue from 'vue';
import Vuex from 'vuex';

Vue.use(Vuex);

const store = new Vuex.Store({
  state: {
    user: {
      name: 'John',
      age: 25
    }
  },
  mutations: {
    // 添加新属性的mutation（可选）
    addNewProperty(state, payload) {
      state.user[payload.key] = payload.value;
    }
  },
  actions: {
    // 添加新属性的action（可选）
    addNewProperty({ commit }, payload) {
      commit('addNewProperty', payload);
    }
  },
  getters: {
    // 获取新属性的getter（可选）
    getUserAge(state) {
      return state.user.age;
    }
  }
});

export default store;

<!-- MyComponent.vue -->

<template>
  <div>
    <p>Name: {{ user.name }}</p>
    <p>Age: {{ userAge }}</p>
    <button @click="addNewProperty">Add New Property</button>
  </div>
</template>

<script>
import { mapState, mapActions, mapGetters } from 'vuex';

export default {
  computed: {
    ...mapState(['user']),
    ...mapGetters(['getUserAge']),
  },
  methods: {
    ...mapActions(['addNewProperty']),
    addNewProperty() {
      this.addNewProperty({ key: 'newProperty', value: 'some value' });
    }
  }
};
</script>