wagtail/tsconfig.json

{
  "compilerOptions": {
    "jsx": "react",
    "lib": ["es2015", "dom"],
    "noImplicitAny": false, // TODO: Enable once all existing code is typed
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "strictNullChecks": true,
    "esModuleInterop": true,
    "allowJs": true,
    "downlevelIteration": true
  },
  "files": ["client/src/index.ts", "client/src/custom.d.ts"]
}