https://github.com/zjhr/zr-draw-html
jsplumb中文手册
https://wdd.js.org/jsplumb-chinese-tutorial/#/?id=_3-jsplumb%e9%bb%98%e8%ae%a4%e9%85%8d%e7%bd%ae%e7%ae%80%e4%bb%8b
https://github.com/wangduanduan/jsplumb-chinese-tutorial#1-jsplumb-%E4%B8%AD%E6%96%87%E5%9F%BA%E7%A1%80%E6%95%99%E7%A8%8B




https://www.npmjs.com/package/mxgraph-js
https://github.com/cloudfroster/mxgraph-js
案例：
http://jgraph.github.io/mxgraph/javascript/index.html

具体例子scrollbars：
http://jgraph.github.io/mxgraph/javascript/examples/scrollbars.html