It'd be nice to offer a supplemental ESM build that's linked via:

• "module" in package.json
• the import key inside each exports entry (inside package.json too)

This'd end up looking something like:

{ // ... "module": "dist/index.mjs", "main": "dist/index.js", // ... "exports": { ".": { "require": "./dist/index.js", "import": "./dist/index.mjs" }, "./from": { "require": "./from/index.js", "import": "./from/index.mjs" } } // ... }

This allows for native ESM resolution in Node.js (12.x and >=14) in supporting environments w/o sacrificing CommonJS (default) support. Also allows bundler(s) to pick up the ESM entry, too.

There's one gotcha – Node 13.0 thru 13.7 don't support this version of exports.
This can be patched – but only if you decide to keep the default exports (module.exports / export default) that you currently have. This means that the the addition remains non-breaking, even w/ these Node versions.

I can PR these changes if desired.