在vue自定义指令directives中获取this指针

<template>
  <div v-my-custom-directive></div>
</template>

<script>
  export default {
    directives: {
      myCustomDirective: {
        inserted(el, binding, vnode) {
          let that = vnode.context; // 在此处获取this指针
        },
      },
    },
  };
</script>