ESM only packages

ESM is a much more modern standard, and given the complexity of [[20250627030527-cjs-esm-bundling]], some maintainers are opting to produce ESM only packages.

Error [ERR_REQUIRE_ESM]: require() of ES Module esm-only-package not supported.

When using a ESM package, you cannot require the package, leaving you with a few options:

1. Use type: module in your application
2. Use await import
3. Use Node 22, which can require ESM packages

To ensure your Typescript project is using ESM properly, you may need to change module and moduleResolution to newer values, such as nodenext.

Additionally there's some weirdness around using file extensions in imports which I don't fully understand yet.

https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c https://antfu.me/posts/publish-esm-and-cjs#compatibility

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