excalidraw

https://github.com/excalidraw/excalidraw

npm install
本地部署。

$ npm start

https://www.cnblogs.com/renamoe/p/14806372.html

https://excalidraw.com/

https://mp.weixin.qq.com/s/vnQawn2QzkJ9ak-5A2_VUw

https://mp.weixin.qq.com/s?__biz=MzA3NDM0ODQwMw==&mid=203760899&idx=1&sn=7c4e6efe178ea59e1669e93f5ea05d4c&chksm=16d0a71f21a72e09ca6c1c75706caa989200a56d8b8d49973d351948e652f84d2eabcef249f1&scene=21#wechat_redirect

https://mp.weixin.qq.com/s?__biz=MzA3NDM0ODQwMw==&mid=203733442&idx=1&sn=720a2ca2c59ea862155b93600b53946c&chksm=16d13bde21a6b2c85e520acf4370145c9bc88c08d885d8d57a0e1adea0604d065dcb69247aaa&scene=21#wechat_redirect

https://jeremykao.gitbooks.io/learning-ditaa/content/start/setup.html

https://coolshell.cn/articles/1684.html

http://ditaa.sourceforge.net/