tsconfig.json

{
  "compilerOptions": {
    "outDir": "dist",
    "allowJs": true,
    "alwaysStrict": true,
    // enabling declaration (.d.ts) emit
    "declaration": true,
    // optional - in general it's a good practice to decouple declaration files from your actual transpiled JavaScript files
    // "declarationDir": "./dist/dts",
    // optional if you're using babel to transpile TS -> JS
    // "emitDeclarationOnly": true
    "downlevelIteration": true,
    "lib": ["es2017", "dom"],
    "module": "esnext",
    // "module": "CommonJS", // used for local testing
    "skipLibCheck": true,
    "allowSyntheticDefaultImports": true,
    "forceConsistentCasingInFileNames": true,
    "noFallthroughCasesInSwitch": true,
    "isolatedModules": true,
    "noEmit": true, // older
    "esModuleInterop": true,
    "moduleResolution": "node",
    "noImplicitAny": true,
    "sourceMap": true,
    "target": "es5",
    "baseUrl": "./",
    "paths": {
      "*": ["src/@customTypes/*"],
      "crypto": [
        "node_modules/crypto-js" // use browser version of crypto library
      ]
    },
    "resolveJsonModule": true
  },
  "exclude": ["dist", "dist.browser", "node_modules"],
  "include": ["src/**/*.js", "src/**/*.ts"]
}