First component of the bulk migration phase (step 2 of the 1-3-2 plan).
Pattern is now well-rehearsed across Toggle / Collapsible / Toast / Switch:
- morfo: add `value` sources to data entries that were enum-only
- provider: replace manual Opts interface with `OptsFromProps<...>`,
create runtime in constructor, register parts, drop manual data-* /
aria attrs from props (runtime emits via dom.apply)
- wrapper: replace per-prop `readableActive(() => x)` list with one
`bindProps({ ... })` call
- keep manual: HTML primitives (style, src, etc.) and event handlers
Avatar specifics
- 3 parts (provider/image/fallback) all share `data-status` from the root's
internal `status` State (idle/loading/loaded/error). morfo's `propRef('status')`
reads from runtime sources where the root provider exposes it.
- `status` is not a public Props field — it's an internal $state in the
wrapper. Manually intersected into `AvatarOpts` rather than derived from
AvatarProps.
- Image's preload logic, src/crossorigin/referrerpolicy passthrough, and
the style-based show/hide on each part stay in the provider's render —
none of these are morfo-managed.
- Wrapper cast uses `as unknown as Parameters<typeof X.create>[0]` for
parts whose Opts have only `id`+`ref` (TS can't extract the specific
fields from the generic `Record<string, Active<unknown>>` return of
`bindProps`). Toggle/Switch don't need this because their richer Opts
shape provides enough overlap.
Bulk migration paused at this point — Progress / Meter need a design
decision around `aria-label` priority logic (the legacy provider has
"consumer-passed wins over translated default", which conflicts with the
"dom.apply is the only writer of mutable attrs" rule). Either:
(a) Drop aria-label from those morfos and keep provider-managed (legacy
pattern preserved, morfo loses one declaration).
(b) Extend the resolver with a priority chain (propRef → translationRef
fallback) so the morfo can express "consumer wins, translation
otherwise".
Verification
- 66/66 morfo-check (Avatar passes; all data-status emitted by runtime).
- 68/68 smoke routes.
- svelte-check unchanged at 155.
