问ie11上的sl-vue-tree + vue-cli3.1

EN

import "@babel/polyfill"

import Vue from 'vue';
import App from './App.vue';
import router from './router';
import store from './store';

Vue.config.productionTip = false;

new Vue({
  router,
  store,
  render: (h) => h(App),
}).$mount('#app');

<template>
  <div class="about">
    <h1>This is an about page</h1>
    <SlVueTree v-model="treeModel">

    </SlVueTree>
  </div>
</template>
<script lang="ts">
import { Component, Vue } from "vue-property-decorator";

//sl-vue-tree
import SlVueTree from "sl-vue-tree-original";


@Component({
  components: {
    SlVueTree
  }
})
export default class About extends Vue {

  public treeModel = [
    {
        "title": "Item1",
        "isLeaf": true
    },
    {
        "title": "Item2",
        "isLeaf": true
    },
    {
        "title": "Folder1",
        "isExpanded": true,
        "children": [
            {
                "title": "Item3",
                "isLeaf": true
            },
            {
                "title": "Item4",
                "isLeaf": true
            },
            {
                "title": "Folder2",
                "children": [
                    {
                        "title": "Item5",
                        "isLeaf": true
                    }
                ]
            }
        ],
        "isSelected": true
    },
    {
        "title": "Item6",
        "isLeaf": true
    }
];

  }
}
</script>