It's possible, but it can be weird and difficult: https://nodejs.org/docs/latest-v17.x/api/esm.html#esm_commonjs_namespaces https://nodejs.org/docs/latest-v17.x

It's possible, but it can be weird and difficult: https://nodejs.org/docs/latest-v17.x/api/esm.html#esm_commonjs_namespaces https://nodejs.org/docs/latest-v17.x/api/esm.html#esm_common... Thankfully, actively-maintained CommonJS-only packages are quite rare by this point (in my experience). > our downstream NPM consumers wouldn't be able to consume EJS Node.js 20.17 and later supports loading ESM using `require()`: https://nodejs.org/api/modules.html#loading-ecmascript-modules-using-require https://nodejs.org/api/modules.html#loading-ecmascript-modul... The next version of Babel (currently in beta) is even going ESM-only.