tsconfig.json

{
    "compilerOptions": {
        /* Language and Environment */
        "target": "ESNext",                                 /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
        "lib": ["ESNext", "DOM"],                           /* Specify a set of bundled library declaration files that describe the target runtime environment. */
        // "jsx": "react-jsx",                                 /* Specify what JSX code is generated. */
        "useDefineForClassFields": true,                    /* Emit ECMAScript-standard-compliant class fields. */

        /* Modules */
        "module": "ESNext",                                 /* Specify what module code is generated. */
        "moduleResolution": "node",                         /* Specify how TypeScript looks up a file from a given module specifier. */
        // "rootDir": "src",                                   /* Specify the root folder within your source files. */
        // "resolveJsonModule": true,                          /* Enable importing .json files. */

        /* Emit */
        // "noEmit": true,                                     /* Disable emitting files from a compilation. */
        "declaration": true,                                /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
        "sourceMap": true,                                  /* Create source map files for emitted JavaScript files. */
        // "outDir": "dist",                                   /* Specify an output folder for all emitted files. */

        /* Interop Constraints */
        "isolatedModules": true,                            /* Ensure that each file can be safely transpiled without relying on other imports. */
        "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. */

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