tsconfig.json

{
  "$schema": "https://json.schemastore.org/tsconfig",
  "compilerOptions": {
    // type checking only
    "noEmit": true,

    // importing ts files
    "allowImportingTsExtensions": true,

    // hella strict
    // https://whatislove.dev/articles/the-strictest-typescript-config/
    "allowJs": false,
    "exactOptionalPropertyTypes": true,
    "noPropertyAccessFromIndexSignature": true,
    "noUncheckedIndexedAccess": true,
    "strict": true,
    "strictNullChecks": true,

    // esm, the node way
    "esModuleInterop": true,
    "isolatedModules": true,
    "lib": ["ESNext"],
    "module": "ESNext",
    "moduleDetection": "force",
    "moduleResolution": "bundler",
    "target": "esnext",
    "verbatimModuleSyntax": true,

    // pnpm compatibility
    "preserveSymlinks": true,

    // importing json happens more often than you think
    "resolveJsonModule": true,

    // don't try to check for errors on imported libs
    "skipLibCheck": true,

    // react, next
    "jsx": "preserve",
    "plugins": [
      {
        "name": "next"
      }
    ],
    "types": ["@testing-library/jest-dom"],
    "incremental": true
  },

  // also for next
  "include": [
    "./*.config.js",
    "./*config.ts",
    ".next/types/**/*.ts",
    "./build/types/**/*.ts",
    "./dist/types/**/*.ts",
    "./next-env.d.ts",
    "./src/**/*.ts",
    "./src/**/*.tsx",
    "./test/**/*.ts",
    "./test/**/*.tsx"
  ],
  "exclude": ["node_modules", "build", "coverage", "dist"]
}