Sorry I didn't mean to. I was curious and asked some questions because both projects looks very very close to each other.
I just tested the offline support of CodeSandbox and I did manage to work with the editor (the same functionality you've mentioned in the blog post) when the network is offline. You can't test it here: https://codesandbox.io/s/new
Again, what you did is absolutely perfect and I don't want or mean to underestimate your work! :)
You're telling me that CSB hosts a live dev server inside of a service worker that works across browser tabs? That's patently false. This is ours in action, for reference (was even included in the blog post) -> https://twitter.com/ericsimons40/status/893238309085822977
If you're genuinely just confused about how this stuff works, please _ask questions_ instead of making random assertions. Otherwise people get the impression you're shilling a separate product.
I just tested the offline support of CodeSandbox and I did manage to work with the editor (the same functionality you've mentioned in the blog post) when the network is offline. You can't test it here: https://codesandbox.io/s/new
Again, what you did is absolutely perfect and I don't want or mean to underestimate your work! :)