babel-runtime/transform-runtime/babel-polyfill

 learning mark

 

Duplicate code exists after babel translation 

babel-runtime can solve repetitive code,

babel-transform-runtime automatically detects dependencies

babel-polyfill has the most complete functions

 

https://segmentfault.com/q/1010000005596587

 

https://www.zhihu.com/question/49382420

 

http://blog.csdn.net/a324539017/article/details/52824189