vux action改变状态 一个简单的例子 vux mutation改变状态

接上文

一个简单的例子 vux mutation改变状态

D:\workspace\xxx\src\main.js

定义actions

let store = new Vuex.Store({
  state: {
    totalPrice: 0
  },
  mutations: {
    increment (state, price) {
      state.totalPrice += price
    },
    decrement (state, price) {
      state.totalPrice -= price
    }
  },
  // actions是mutations之前的动作,只能调用mutations
  actions: {
    increase (context, price) {
      context.commit('increment', price)
    }
  }
})

  

D:\workspace\xxx\src\components\Apple.vue

就可以使用用.dispatch('increase', this.price)方法,间接操作mutations

与mutations的区别是actions是异步的

<template>
    <div>
      <h1 >{{ msg }}</h1>
      <button @click="addOne">addOne</button>
      <button @click="minusOne">minusOne</button>
      <router-view/>
    </div>
</template>

<script>
export default {
  name: 'Apple',
  data () {
    return {
      msg: 'I am an apple',
      price: 5
    }
  },
  methods: {
    addOne () {
      // this.$store.commit('increment', this.price)
      this.$store.dispatch('increase', this.price)
    },
    minusOne () {
      this.$store.commit('decrement', this.price)
    }
  }
}
</script>

  

例如这种情况只能用actions

https://github.com/vuejs/vuex

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转载自www.cnblogs.com/tabCtrlShift/p/9163579.html