why not choose fully es6

[jasonChen1982]

why source code do not choose es6 coding style?

[jasonChen1982]

es6 was an efficient way to preparation and design a library. but for now, it was not an good way,because full es6 will bring some side-effects

[woshi82]

what side-effects?

[jasonChen1982]

code will become unreadability and cause s lot of polyfill snippet for es6 feature, there is unhelpful and brought additional problems. so why use it at this time?
ping @woshi82