tsconfig.json

{
  "compilerOptions": {
    "lib": ["ES6", "ES2015", "ES2016", "ES2017", "ES2018", "ES2019", "ES2020", "ES2022"],
    "target": "ES6" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */,

    /* Modules */
    "module": "CommonJS" /* Specify what module code is generated. */,
    "rootDir": "./src" /* Specify the root folder within your source files. */,
    "moduleResolution": "Node" /* Specify how TypeScript looks up a file from a given module specifier. */,
    "baseUrl": "./" /* Specify the base directory to resolve non-relative module names. */,
    "paths": {} /* Specify a set of entries that re-map imports to additional lookup locations. */,
    "types": [
      "jest",
      "node"
    ] /* Specify type package names to be included without being referenced in a source file. */,
    "resolveJsonModule": true /* Enable importing .json files. */,

    /* JavaScript Support */
    "allowJs": true /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */,
    "checkJs": true /* Enable error reporting in type-checked JavaScript files. */,
    /* Emit */
    "declaration": true /* Generate .d.ts files from TypeScript and JavaScript files in your project. */,
    // "declarationDir": "dist/@types" /* Specify the output directory for generated declaration files. */,
    // these next two need to be set to true for tests.
    "declarationMap": false /* Create sourcemaps for d.ts files. */,
    "sourceMap": false /* Create source map files for emitted JavaScript files. */,
    "outDir": "./dist" /* Specify an output folder for all emitted files. */,
    "removeComments": true /* Disable emitting comments. */,
    "newLine": "lf" /* Set the newline character for emitting files. */,

    /* Interop Constraints */
    "isolatedModules": true /* Ensure that each file can be safely transpiled without relying on other imports. */,
    "allowSyntheticDefaultImports": true /* Allow 'import x from y' when a module doesn't have a default export. */,
    "esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */,
    // "preserveSymlinks": true,                         /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
    "forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */,

    /* Type Checking */
    "strict": true /* Enable all strict type-checking options. */,
    "strictNullChecks": true /* When type checking, take into account 'null' and 'undefined'. */,
    "strictFunctionTypes": true /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */,
    "strictPropertyInitialization": true /* Check for class properties that are declared but not set in the constructor. */,
    "alwaysStrict": true /* Ensure 'use strict' is always emitted. */,
    "noUnusedLocals": true /* Enable error reporting when local variables aren't read. */,
    "noUnusedParameters": true /* Raise an error when a function parameter isn't read. */,
    "noImplicitReturns": true /* Enable error reporting for codepaths that do not explicitly return in a function. */,
    "allowUnreachableCode": false /* Disable error reporting for unreachable code. */,

    /* Completeness */
    "skipDefaultLibCheck": true /* Skip type checking .d.ts files that are included with TypeScript. */,
    "skipLibCheck": true /* Skip type checking all .d.ts files. */
  },
  "buildOptions": {
    "force": true
  },
  "include": ["./src/**/*"],
  "exclude": ["node_modules", "./dist/**/*"]
}