https://vue-treeselect.js.org/#basic-features
https://blog.csdn.net/w_quan/article/details/105711669
https://blog.csdn.net/webshao/article/details/104517683
首先安装 npm install @riophae/vue-treeselect --save 然后在页面中引入 import Treeselect from '@riophae/vue-treeselect' import '@riophae/vue-treeselect/dist/vue-treeselect.css'