Tern was configured as the javascript backend but the ‘tern’ layer is not present in your ‘.spacemacs’!

[Young-people]

这是为什么，我把tern加到additional-package里面也不行

[fengche]

没用spacemacs，但是这里错误提示 tern是个layer，而不是一个package，所以你配置错地方了。