ast

https://en.wikipedia.org/wiki/Abstract_syntax_tree

https://angular.cn/guide/language-service

https://www.cnblogs.com/qinmengjiao123-123/p/8648488.html

https://segmentfault.com/a/1190000014389494

https://resources.jointjs.com/demos/javascript-ast

https://juejin.im/post/5bff941e5188254e3b31b424