UMD/CommonJS/ES Modules/AMD

UMD: https://github.com/umdjs/umd
CommonJS: http://wiki.commonjs.org/wiki/Modules/1.1
ES Modules: http://exploringjs.com/es6/ch_modules.html
AMD:https://en.wikipedia.org/wiki/Asynchronous_module_definition

模块之间通信

Event BUS机制

CommonJS 模块检索算法

node's module lookup algorithm (参考Browserify)