Vuex反应性-更新存储中的数组值不会更新组件中的计算值

import Vue from 'vue';
import { mapState } from 'vuex';

export default {
  computed: {
    ...mapState('module', ['array']),
    computedValue() {
      return this.array.length;
    },
  },
  methods: {
    updateArray() {
      Vue.set(this.array, 0, 'new value');
    },
  },
};

import { mapState } from 'vuex';

export default {
  computed: {
    ...mapState('module', ['array']),
    computedValue() {
      return this.array.length;
    },
  },
  methods: {
    updateArray() {
      this.array = [...this.array.slice(0, 1), 'new value', ...this.array.slice(1)];
    },
  },
};