tsconfig.json

{
  "compilerOptions": {
    "incremental": true,                      /* Enable incremental compilation */
    "target": "es2016",                       /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
    "lib": [ "es2016", "dom" ],               /* Specify library files to be included in the compilation. */
    "declaration": true,                      /* Generates corresponding '.d.ts' file. */
    "declarationMap": true,                   /* Generates a sourcemap for each corresponding '.d.ts' file. */
    "outFile": "./dist/bundle.js",            /* Concatenate and emit output to single file. */
    "outDir": "./dist/",                      /* Redirect output structure to the directory. */
    "rootDir": "./src/",                      /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
    "composite": true,                        /* Enable project compilation */
    "removeComments": true,                   /* Do not emit comments to output. */
    "strict": true,                           /* Enable all strict type-checking options. */
    "noImplicitReturns": true,                /* Report error when not all code paths in function return a value. */
    "noFallthroughCasesInSwitch": true,       /* Report errors for fallthrough cases in switch statement. */
    "moduleResolution": "node",               /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
    "baseUrl": "./",                          /* Base directory to resolve non-absolute module names. */
    "rootDirs": [ "./src/" ],                 /* List of root folders whose combined content represents the structure of the project at runtime. */
    "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    "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. */
  }
}