Upcoming: ESM support (minor breaking change - that should affect no actual clients)

[stroiman]

Things have been moving slow for various reasons, unfortunately.

I wanted to add support for Datastar, another hypermedia framework. DataStar depends on a few features that are not yet supported.

• MutationObserver - which I have a working copy in Go code, but not exposed to JS yet
• Fetch - which I might be able to monkey patch
• ESM support, as datastar is distributed as modules, not classic scripts.

ESM support is quite profound, as v8go doesn't support ESM. On top of that it pushes some responsibility to the client (Gost-DOM) for performing import resolution. So far I have an experimental branch of v8go with ESM support, though no dynamic imports yet, and I have now started consuming this version from Gost-DOM.

In order to support import resolution, I needed to change the interface between the global window and the script engine. As I don't think anyone has created their own custom script engine, this should be good.

[stroiman]

Status update:

• MutationObserver is now implemented in JS and merged to main
• ESM is working in an experimental branch
• Dataset is partially working, you can 'get' elements, but not 'set' them

Fetch is still missing. But initial datastar support is getting nearer.