The following improvements were made:
- do not require empty object in constructor
- allow components to override render mode based on constructor values
- improve error handling in get()
- allow array of property names in on_ready()->listen()
- allow components to be attached to shadow roots
ExportService gets removed and instead a global class registry is added.
The `init.js` file is split into `init_sync.js` and `init_async.js`
so that synchronous code that isn't dependent on imports is guarenteed
to run before initgui.js. The globalThis scope and service-script API
now expose `def`, a function for registering class definitions, and
`use`, a function for obtaining registered classes.
In the first pass I add a `register` method and update `defineComponent`
so it calls `register` as well. This made it possible to create a
proof-of-concept for registered classes. Additionally ExportService was
added to expose registered classes to service scripts. This first pass
works, but it would be better if all types of classes (components or
otherwise) were registered via the same method.
If the Component gets removed from the DOM and then re-added, it already
has contents, and we don't need to create them again. It also has
already had on_ready called, so that doesn't need to happen again
either.
This fix stops Components duplicating their content elements and
listener callbacks whenever they're moved around the document.
KernelDeimos