play.golang.org如何自动管理导入？

Question

Is there an open source JavaScript library that golang.org uses for Go Playgrounds? How does the Imports checkbox know which imports to add?

http://play.golang.org/p/A0nH96VB4S

Answer 1

It uses the goimports tool.

goimports works as a direct replacement for gofmt, with all the same options.