tsconfig.json

{
    "include": [
        "./src/**/*.ts"
    ],
    "compilerOptions": {
        /* Basic Options */
        "target": "es3",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
        "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
        "lib": ["esnext"],                        /* Specify library files to be included in the compilation. */
        // "allowJs": true,                       /* Allow javascript files to be compiled. */
        // "checkJs": true,                       /* Report errors in .js files. */
        // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
        "declaration": true,                      /* Generates corresponding '.d.ts' file. */
        // "sourceMap": true,                     /* Generates corresponding '.map' file. */
        // "outFile": "./",                       /* Concatenate and emit output to single file. */
        // "removeComments": true,                /* Do not emit comments to output. */
        "outDir": "./lib",
        // "noEmit": true,                        /* Do not emit outputs. */
        "importHelpers": true,                   /* Import emit helpers from 'tslib'. */
        "downlevelIteration": true,               /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
        // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */

        /* Strict Type-Checking Options */
        "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. */
        "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. */

        /* Additional Checks */
        "noUnusedLocals": true,                   /* Report errors on unused locals. */
        "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. */

        /* Module Resolution Options */
        "moduleResolution": "node",               /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
        // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
        // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
        // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
        // "typeRoots": [],                       /* List of folders to include type definitions from. */
        // "types": [],                           /* Type declaration files to be included in compilation. */
        // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
        "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
        // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */

        /* Source Map Options */
        // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
        // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
        // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
        // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */

        /* Experimental Options */
        "experimentalDecorators": true,           /* Enables experimental support for ES7 decorators. */
        "emitDecoratorMetadata": true,            /* Enables experimental support for emitting type metadata for decorators. */
    }
}