`mjml2html` render in web worker throws `Uncaught ReferenceError: window is not defined` about mjml HOT 2 OPEN

As you mentioned window is not available to web worker contexts.
https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Functions_and_classes_available_to_workers

The way the mjml-browser build script works, it just dumps out a generic amd style export that binds the window object.
build script source: https://github.com/mjmlio/mjml/blob/master/packages/mjml-browser/webpack.config.js
public compiled source: https://cdn.jsdelivr.net/npm/[email protected]/lib/index.js

This would likely require a mjml-webworker package to be built for this use case.

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If we remove the window binding (which the mjml library does not depend on), then the mjml-browser package would work in web workers.

So, I’m not sure if a separate package is required, as long as we modify the generic amd style export in some way:

• bind to globalThis instead of window
• only bind to window if it exists

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