tsconfig.json

{
    "compilerOptions": {
        "target": "es2020",
        "module": "commonjs",
        "sourceMap": true,
        // "outFile": "./",                       /* Concatenate and emit output to single file. */
        "strict": true,                           /* Enable all strict type-checking options. */
        "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
        "strictNullChecks": true,              /* Enable strict null checks. */
        "strictFunctionTypes": true,           /* Enable strict checking of function types. */
        "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
        "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
        "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
        "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
        "noUnusedParameters": true,            /* Report errors on unused parameters. */
        "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
        "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
        "baseUrl": "src/",                       /* Base directory to resolve non-absolute module names. */
        "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
        "forceConsistentCasingInFileNames": true,  /* Disallow inconsistently-cased references to the same file. */
        "outDir": "lib"
    },
    "include": ["src/**/*"],
}