This project was generated with Angular CLI version 6.1.5.
Run ng serve for a dev server. Navigate to http://localhost:4200/. The app will automatically reload if you change any of the source files.
说明 简单的树控件,按需加载,只画当前展开的数据和根节点,基本的展开收起功能,全选半选不选等操作.
