tsconfig.test.json

{
    // see https://www.typescriptlang.org/tsconfig to better understand tsconfigs
    "include": ["src", "types"],
    "compilerOptions": {
      "module": "esnext",
      "lib": ["dom", "esnext"],
      "target": "esnext",
      "importHelpers": true,
      // output .d.ts declaration files for consumers
      "declaration": true,
      // output .js.map sourcemap files for consumers
      "sourceMap": true,
      // match output dir to input dir. e.g. dist/index instead of dist/src/index
      "rootDir": "./src",
      // stricter type-checking for stronger correctness. Recommended by TS
      "strict": true,
      // linter checks for common issues
      "noImplicitReturns": true,
      "noFallthroughCasesInSwitch": true,
      // noUnused* overlap with @typescript-eslint/no-unused-vars, can disable if duplicative
      "noUnusedLocals": true,
      "noUnusedParameters": true,
      // use Node's module resolution algorithm, instead of the legacy TS one
      "moduleResolution": "node",
      // transpile JSX to React.createElement
      "jsx": "react",
      // interop between ESM and CJS modules. Recommended by TS
      "esModuleInterop": true,
      // significant perf increase by skipping checking .d.ts files, particularly those in node_modules. Recommended by TS
      "skipLibCheck": true,
      // error out if import and file system have a casing mismatch. Recommended by TS
      "forceConsistentCasingInFileNames": true,
      // `tsdx build` ignores this option, but it is commonly used when type-checking separately with `tsc`
      "noEmit": true,
    }
  }