element 树形穿梭框使用

想做一个树形穿梭框的效果，看了下当前element的官网，只有列表形式的穿梭框，搜了下其他达人帖子，有一些例子，参考着做了写。

1、先仿照达人的例子，代码整个po上，跑出来看看效果，结果提示

This dependency was not found:

* el-tree-transfer in ./node_modules/_babel-loader@7.1.5@babel-loader/lib!./node_modules/_vue-loader@13.7.3@vue-loader/lib/selector.js?type=script&index=0!./src/views/sys/user/SysRolePermissionTree2.vue

To install it, you can run: npm install --save el-tree-transfer

那就安装下吧，按提示执行命令

D:\project>npm i el-tree-transfer -S
WARNING: You are likely using a version of node-tar or npm that is incompatible with this version of Node.js.
Please use either the version of npm that is bundled with Node.js, or a version of npm (> 5.5.1 or < 5.4.0) or node-tar (> 4.0.1) that is compatible with Node.js 9 and above.
npm[16380]: c:\ws\src\node_zlib.cc:568: Assertion `args.Length() == 7 && "init(windowBits, level, memLevel, strategy, writeResult, writeCallback," " dictionary)"' failed.