tsconfig.json

{
  "$schema": "https://json.schemastore.org/tsconfig",
  /* Visit https://aka.ms/tsconfig to read more about this file */
  "compilerOptions": {
    /* Language and Environment */
    "target": "es2017", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "lib": ["es2020"], /* Specify a set of bundled library declaration files that describe the target runtime environment. */
    "experimentalDecorators": true, /* Enable experimental support for legacy experimental decorators. */
    "emitDecoratorMetadata": true, /* Emit design-type metadata for decorated declarations in source files. */
    "moduleDetection": "auto", /* Control what method is used to detect module-format JS files. */

    /* Modules */
    "module": "commonjs", /* Specify what module code is generated. */
    "rootDir": "src", /* Specify the root folder within your source files. */
    "moduleResolution": "node10", /* Specify how TypeScript looks up a file from a given module specifier. */
    "typeRoots": ["node_modules/@types", "src/types"], /* Specify multiple folders that act like './node_modules/@types'. */
    "resolveJsonModule": true, /* Enable importing .json files. */

    /* Emit */
    "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
    "inlineSourceMap": true, /* Include sourcemap files inside the emitted JavaScript. */
    "outDir": "lib", /* Specify an output folder for all emitted files. */
    "importsNotUsedAsValues": "remove", /* Specify emit/checking behavior for imports that are only used for types. */
    "stripInternal": true, /* Disable emitting declarations that have '@internal' in their JSDoc comments. */
    "noEmitOnError": true, /* Disable emitting files if any type checking errors are reported. */

    /* Interop Constraints */
    "esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
    "forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */

    /* Type Checking */
    "strict": true, /* Enable all strict type-checking options. */                           
    "noImplicitAny": true, /* Enable error reporting for expressions and declarations with an implied 'any' type. */
    "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. */
    "strictBindCallApply": true, /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */
    "strictPropertyInitialization": true, /* Check for class properties that are declared but not set in the constructor. */
    "noImplicitThis": true, /* Enable error reporting when 'this' is given the type 'any'. */
    "useUnknownInCatchVariables": true, /* Default catch clause variables as 'unknown' instead of 'any'. */
    "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. */
    "exactOptionalPropertyTypes": true, /* Interpret optional property types as written, rather than adding 'undefined'. */
    "noImplicitReturns": true, /* Enable error reporting for codepaths that do not explicitly return in a function. */
    "noFallthroughCasesInSwitch": true, /* Enable error reporting for fallthrough cases in switch statements. */
    "noUncheckedIndexedAccess": true, /* Add 'undefined' to a type when accessed using an index. */
    "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an override modifier. */
    "noPropertyAccessFromIndexSignature": true, /* Enforces using indexed accessors for keys declared using an indexed type. */
    "allowUnusedLabels": false, /* Disable error reporting for unused labels. */
    "allowUnreachableCode": false, /* Disable error reporting for unreachable code. */

    /* Completeness */
    "skipLibCheck": true /* Skip type checking all .d.ts files. */
  },
  "ts-node": {
    "moduleTypes": {
      "jest.config.ts": "cjs"
    }
  },
  "include": [
    "src/**/*.ts",
  ],
  "exclude": [
    "**/__tests__/"
  ]
}