tsconfig.json

{
  "compilerOptions": {
    /* Language and Environment */
    "target": "ES2017",                                    /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "lib": ["ES6", "dom"],                           /* Specify a set of bundled library declaration files that describe the target runtime environment. */
    "sourceMap": false,
    "allowJs": true,
    /* Modules */
    "baseUrl": ".",
    "module": "commonjs",                              /* Specify what module code is generated. */
    "rootDir": "src",                                    /* Specify the root folder within your source files. */
    "moduleResolution": "node",                       /* Specify how TypeScript looks up a file from a given module specifier. */
    "outDir": "build",                                   /* Specify an output folder for all emitted files. */
    "noEmitOnError": true,                            /* Disable emitting files if any type checking errors are reported. */
    "pretty": true,
    /* Interop Constraints */
    "allowSyntheticDefaultImports": true,             /* Allow 'import x from y' when a module doesn't have a default export. */
    "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": false,                               /* Enable error reporting for expressions and declarations with an implied `any` type.. */
    "skipLibCheck": true,                                 /* Skip type checking all .d.ts files. */
    "noImplicitReturns": true,
    "noImplicitThis": true,
    // "strictNullChecks": true,
    "suppressImplicitAnyIndexErrors": true,
    "resolveJsonModule": true,
    "noUnusedParameters": true,
    "strictPropertyInitialization": false
  },
  "exclude": ["node_modules", "build"],
  "include": ["src/**/*.ts", "src/**/*.tsx", "declarations/**/*.d.ts"]
}