Material-UI

link - material-ui.com
This is a React UI framework.

npm install @material-ui/core 
npm install @material-ui/lab 
npm install @material-ui/icons 

CDN

development: https://unpkg.com/@material-ui/core@latest/umd/material-ui.development.js

TreeView

link - https://material-ui.com/components/tree-view/