vue中的依赖注入provide和inject简单介绍

<template>
  <div >
    <div class="view">
      <router-view v-if="isRouterAlive"></router-view>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      isRouterAlive: true
    }
  },
  provide() {
    return {
      reload: this.reload
    }
  },
  methods: {
    reload() {
      this.isRouterAlive = false
      this.$nextTick(function() {
        this.isRouterAlive = true
      })
    }
  }
}

inject: ['reload']

<template>
  <div>
    <div>我是index组件</div>
    <A></A>
  </div>
</template>

<script>
import A from '@/components/A.vue'

export default {
  components: {
    A
  },
  data() {
    return {}
  },
  provide: {
    text: '我是父组件的provide信息666'
  }
}
</script>

<style></style>

<template>
  <div>
    <div>我是B组件</div>
    <div>{{ msg }}</div>
  </div>
</template>

<script>
export default {
  name: 'B',
  data() {
    return {
      msg: this.text
    }
  },
  inject: ['text']
}
</script>

<style></style>

<template>
  <div>
    <div>我是index组件</div>
    <A></A>
  </div>
</template>

<script>
import A from '@/components/A.vue'

export default {
  components: {
    A
  },
  data() {
    return {
      arr: ['1', '2', '3']
    }
  },
  // provide: {
  //   text: '我是父组件的provide信息666'
  // }
  provide() {
    return {
      arr: this.arr
    }
  }
}
</script>

<style></style>

<template>
  <div>
    <div>我是B组件</div>
    <div>{{ msg }}</div>
    <ul v-for="(item, index) in arr" :key="index">
      <li>{{ item }}</li>
    </ul>
  </div>
</template>

<script>
export default {
  name: 'B',
  data() {
    return {
      msg: this.text
    }
  },
  inject: ['arr']
}
</script>

<style></style>