【babel】これ出たら「You have mistakenly installed the `babel` package, which is a no-op in Babel 6.」 2017年1月29日 1086 × 500 【babel】これ出たら「You have mistakenly installed the `babel` package, which is a no-op in Babel 6.」 【babel】これ出たら「You have mistakenly installed the `babel` package, which is a no-op in Babel 6.」 【babel】これ出たら「You have mistakenly installed the `babel` package, which is a no-op in Babel 6.」