尽管看起来很愚蠢，angular-cli 的 tsconfig.json 文件位于 src/tsconfig 内.app.json

As stupid as it may seem, the angular-cli 's tsconfig.json file is located inside src/tsconfig.app.json

根 tsconfig.json 将被编辑器(例如 vscode)使用.

The root tsconfig.json will be used by editors (such as vscode).