tsconfig.json

{
    "compilerOptions": {
        /* Visit https://www.typescriptlang.org/tsconfig to learn more about this file and the options */
        
        /* Language and Environment */
        /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
        "target": "es2016",
            
        /* Modules */
        /* Specify the root folder within your source files. */
        "module": "commonjs",
        /* Specify the root folder within your source files. */
        "rootDir": "./src/",
        /* Enable importing .json files */
        "resolveJsonModule": true,
            
        /* Emit */
        /* Specify an output folder for all emitted files. */
        "outDir": "./build",
        /* Disable erasing `const enum` declarations in generated code. */
        "preserveConstEnums": true,                       

        /* Interop Constraints */
        /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables `allowSyntheticDefaultImports` for type compatibility. */
        "esModuleInterop": true,
        /* Ensure that casing is correct in imports. */
        "forceConsistentCasingInFileNames": true,

        /* Type Checking */
        /* Enable all strict type-checking options. */
        "strict": true,

        /* Completeness */
        /* Skip type checking all .d.ts files. */
        "skipLibCheck": true
    },
    "exclude": [
        "node_modules",
        "build"
    ]
}