javascript - Vuex 突变 mutate 没有反应

Question

state.js：

export default () => ({
  stepBarItems: [
    {
      title: 'General Info',
      active: false,
      current: false
    },
    {
      title: 'Personal Details',
      active: false,
      current: false
    },
    {
      title: 'Travel Details',
      active: false,
      current: false
    },
    {
      title: 'Payment',
      active: false,
      current: false
    },
    {
      title: 'Upload Documents',
      active: false,
      current: false
    }
  ]
})

突变.js：

export default {
  setCurrentStepBarItem(state) {
    const index = state.stepLevel - 1
    state.stepBarItems[index].active = true
    state.stepBarItems[index].current = true
  }
}

表单.vue

  created() {
    this.$store.commit('visa/setCurrentStepBarItem')
  },

问题是突变不是反应性的。

如您所见，状态已更改，我使用 getter 获取 stepBarItems，但没有任何更改。问题是什么？

标签： javascriptvue.jsvuexnuxt.js

Answer 1

您真的不需要这些活动/当前变量。我为使用计算属性获取所需格式做了示例

new Vue({
el: "#app",

data: () => ({
    stepBarItems: [
        'General Info',
        'Personal Details',
        'Travel Details',
        'Payment',
        'Upload Documents'
    ],
        stepLevel: 0
}),

computed: {
    computedStepBarItems() {
        return this.stepBarItems.map((item, index) => ({
            title: item,
            current: this.stepLevel === index,
            active: this.stepLevel >= index
        }))
    }
},

methods: {
    next() {
        this.stepLevel += 1
    },

    prev() {
        this.stepLevel -= 1
    }
}
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
  <pre>{{ computedStepBarItems }}</pre>
  <button @click="prev()">Prev</button>
  <button @click="next()">Next</button>
</div>