小编mik*_*pr4的帖子

const store = new Vuex.Store({
  state: {
    lower: 5,
    higher: 10,
    unrelated: 3
  },
  getters: {
    inRange: state => value => {
      console.log('inRange run')
      return (state.lower <= value) && (state.higher >= value)
    }
  },
  mutations: {
    reduceLower: state => state.lower--,
    incrementUnrelated: state => state.unrelated++
  }
})

new Vue({
  el: '#app',
  template: "<div>{{ inRange(4) }}, {{ unrelated }}</div>",
  store,
  computed: Object.assign(
    Vuex.mapGetters(['inRange']),
    Vuex.mapState(['unrelated'])
  ),
})

setTimeout(function() {
  console.log('reduceLower')
  store.commit('reduceLower')
  setTimeout(function() {
    console.log('incrementUnrelated') …