Vue高阶组件_高阶组件的承上启下

<template>
  <div>
    <button @click="$emit('handle-click')">点击事件</button><br>
    <!--  --> props[p] =======> {
  
  {p}} <br>
    <!--  --> data[myProp] =======> {
  
  {myProp}}<br><br>
    <slot /> --------------------插槽分割线-------------------- <br>
    <slot name="sname" />
  </div>
</template>
<script>
export default {
  props: ['p'],
  components: {},
  data() {
    return {
      myProp: "baseProp1",
    };
  },
  created() {},
  methods: {},
  mounted() {},
  computed: {}
};
</script>

Jetbrains全家桶1年46，售后保障稳定

hoc.js

export default function Wrapper(baseComp) {
 return {
  data() {
   return {};
  },
  mounted() {},
  render(h) {
   return h(baseComp, {})
  }
 }
}

app.vue

<style>
.app {
  padding: 20px;
}
</style>
<template>
  <div class="app">
    /********************** baseComp start **********************/
    <br />
    <baseComp @handle-click="handle" p="baseApp">
      <div>我是一个默认插槽：base默认slot</div>
      <template v-slot:sname>
        <div>我是一个具名插槽：base具名slot</div>
      </template>
    </baseComp>
    <br />
    /********************** baseComp end **********************/
    <br />
    <br />
    /********************** wrapperComp start **********************/
    <br />
    <wrapperComp @handle-click="handle" p="wrapperApp">
      <div>我是一个默认插槽：wrapper默认slot</div>
      <template v-slot:sname>
        <div>我是一个具名插槽：wrapper具名slot</div>
      </template>
    </wrapperComp>
    /********************** wrapperComp end **********************/
  </div>
</template>
<script>
import baseComp from "./baseComp.vue";
import hoc from "./hoc";
const wrapperComp = hoc(baseComp);
export default {
  components: { baseComp, wrapperComp },
  created() {},
  methods: {
    handle() {
      alert("handle success");
    }
  },
  mounted() {},
  computed: {}
};
</script>

我们通过将baseComp传递给hoc.js得到wrapperComp组件，目前只是将模板进行复制，我们来看看效果：

如图我们已经完成一个组件生成另一个组件了，但是你会发现，属性、插槽以及事件都不能正确传递，接下来我们依次实现

五、实现

1、属性、事件

hoc.js

...
render(h) {
   return h(baseComp, {
    on: this.$listeners,
    attrs: this.$attrs,
    props: this.$props
   })
  }
...

点击下方按钮也能触发事件了

2、插槽

hoc.js

...
  render(h) {
   let scopedSlots = {};
   let $slots = this.$slots;
   Object.keys($slots).map((key) => (scopedSlots[key] = () => $slots[key]))
   return h(baseComp, {
    on: this.$listeners,
    attrs: this.$attrs,
    props: this.$props,
    scopedSlots
   })
  }
...

插槽内容也能传递