mastodon/tsconfig.json

{
  "compilerOptions": {
    "jsx": "react",
    "target": "esnext",
    "moduleResolution": "node",
    "allowJs": true,
    "noEmit": true,
    "strict": true,
    "esModuleInterop": true,
    "skipLibCheck": true
  },
  "include": ["app/javascript/mastodon", "app/javascript/packs"]
}