<template>
  <div id="app">
    <button @click="toggle">toggle</button>
    <Drawer @close="toggle" align="left" :closeable="true">
      <div v-if="open">content here</div>
    </Drawer>
  </div>
</template>

<script>
import Drawer from "vue-simple-drawer"
export default {
  name: "app",
  data() {
    return {
      open: true
    }
  },
  components: {
    Drawer
  },
  methods: {
    toggle() {
      this.open = !this.open
    }
  }
}
</script>

   <button @click="toggle">Open/Close</button>
    <Drawer @close="toggle" :align="align" :closeable="true">
      <div v-if="open">
        <span @click="innerOpen=true">
          content here
          content here
          content here
          content here
          content here
          content here
          content here
        </span>
        <Drawer @close="innerOpen=false" :align="align" :closeable="true">
          <div v-if="innerOpen">
            content here
            content here
            content here
          </div>
        </Drawer>
      </div>
    </Drawer>

    ...

      data() {
        return {
          open: false,
          innerOpen: false,
          align: "left"
        };
      },

import "./demo.scss";