__dirname and __filename for ES Modules on Node.js

Node.js v13.2.0 was released and it ships support for ES Modules. Official announcement explains the overview.

In ES Modules environment, global variables such as require, exports, module.exports, __filename, __dirname are not available. require, exports, module.exports are no longer necessary in favor of ESM, but we still need __filename and __dirname which can be calculated from import.meta.url.

To make migration from commonjs to ES Modules smooth, dirname-filename-esm provides functions to create __dirname and __filename variables easily in ES Modules environment.

Usage is very straightforward.

// In ".mjs" script or a script under "type": "module" package
import { dirname, filename } from 'dirname-filename-esm';

const __dirname = dirname(import.meta);
const __filename = filename(import.meta);

// Use __dirname and __filename like under commonjs module

Two functions are exported.

• dirname() takes import.meta object and returns __dirname value of the script.
• filename() takes import.meta object and returns __filename value of the script.

This package has zero dependency.

License

the MIT License