tsconfig.json

{
  "compilerOptions": {
    /* Visit https://aka.ms/tsconfig to read more about this file */

    /* Projects */

    /* Language and Environment */
    "target": "ESNext",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "jsx": "react-jsx",                                  /* Specify what JSX code is generated. */

    /* Modules */
    "module": "ESNext",                                  /* Specify what module code is generated. */
    "moduleResolution": "node10",                        /* Specify how TypeScript looks up a file from a given module specifier. */

    /* JavaScript Support */
    "allowJs": false,                                    /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */
    "maxNodeModuleJsDepth": 1,                           /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */

    /* Emit */
    "declaration": true,                                 /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
    "emitDeclarationOnly": true,                         /* Only output d.ts files and not JavaScript files. */
    "sourceMap": true,                                   /* Create source map files for emitted JavaScript files. */
    "outDir": "dist",                                    /* Specify an output folder for all emitted files. */
    "declarationDir": "types",                           /* Specify the output directory for generated declaration files. */

    /* 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. */
    "noUnusedLocals": true,                              /* Enable error reporting when local variables aren't read. */
    "noUnusedParameters": true,                          /* Raise an error when a function parameter isn't read. */
    "noImplicitReturns": true,                           /* Enable error reporting for codepaths that do not explicitly return in a function. */
    "noFallthroughCasesInSwitch": true,                  /* Enable error reporting for fallthrough cases in switch statements. */
    "noUncheckedIndexedAccess": true,                    /* Add 'undefined' to a type when accessed using an index. */
    "allowUnreachableCode": false,                       /* Disable error reporting for unreachable code. */

    /* Completeness */
    "skipLibCheck": true                                 /* Skip type checking all .d.ts files. */
  }
}