DRAFT: Redesign encoding of element DSL enhancement New feature or request #453
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@armanbilge I have drafted the PR you. Do check it out. It is very "wonky" and still a very crude prototype. Like I have added a basic "Hello world" app in sandbox as demo. It compiles and fastLinks but does not render anything as Tags are incomplete. |
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This PR is an attempt to improve the DSL (the custom HTML DSL) for Calico, aligning with #180’s vision for ergonomic, type-safe, and reactive UI composition, with partial support for web components (#37).
Changes Done
Type-Safe Elements: restrict
Attribute[E, V]andSetter[E, A, V]to specific element types which is enforced at compile time.Reactive Bindings:
Attribute[E, V]supports:=, -->, <--withSignal[IO, V]and Pipe[IO, Event, Nothing].Web Components: enables custom web components by allowing
Tag[customElem]to create with type-safecustomValueAttrandonValueChangedAttrfor props and events.FP-Friendly: IO and Resource for DOM ops, with fs2 streams for events.
Limitations / Future Work
Incomplete Purity: Emits uses unsafeRunSync stub; needs proper cleanup.
Limited Attributes: Missing valueAttr, styleAttr for some tags.
No Calico Core Integration: DSL is standalone, not tied to Calico’s HtmlElement[IO].
Basic Web Components: cccustomTag lacks full props/events support
No Svg support as of now.