使用Vue和jsmind如何实现思维导图的历史版本控制和撤销/重做功能？

npm install vue jsmind

<template>
  <div>
    <div ref="jsmindContainer"></div>
    <button @click="undo">撤销</button>
    <button @click="redo">重做</button>
  </div>
</template>

<script>
import 'jsmind/style/jsmind.css'
import { jsMind } from 'jsmind'

export default {
  name: 'MindMap',
  data () {
    return {
      mindMap: null,
      history: [],
      current: -1
    }
  },
  mounted () {
    const options = {
      container: this.$refs.jsmindContainer,
      editable: true
    }
    this.mindMap = new jsMind(options)
    this.mindMap.set_data(this.history[this.current])
  },
  methods: {
    undo () {
      if (this.current > 0) {
        this.current--
        this.mindMap.set_data(this.history[this.current])
      }
    },
    redo () {
      if (this.current < this.history.length - 1) {
        this.current++
        this.mindMap.set_data(this.history[this.current])
      }
    },
    saveData () {
      const data = this.mindMap.get_data()
      this.history = this.history.slice(0, this.current + 1)
      this.history.push(data)
      this.current = this.history.length - 1
    }
  },
  watch: {
    mindMap: {
      handler: 'saveData',
      deep: true
    }
  }
}
</script>

<template>
  <div>
    <MindMap />
  </div>
</template>

<script>
import MindMap from './MindMap.vue'

export default {
  name: 'App',
  components: {
    MindMap
  }
}
</script>