🚧 mainly wc/ce

dist/esm-with-signals.d.ts

@@ -166,6 +166,34 @@ export const scope: {
 	pop(): ReturnType<Array<Scope>["pop"]>,
 };
 
+/*
+ * TODO TypeScript HACK (better way?)
+ * this doesnt works
+ * ```ts
+ * interface element<el> extends Node{
+ * 	prototype: el;
+ * 	append(...els: (SupportedElement | DocumentFragment | string | element<SupportedElement | DocumentFragment>)[]): el
+ * }
+ *
+export function el<T>(
+ * 	tag_name?: "<>",
+ * ): element<DocumentFragment>
+* ```
+ * …as its complains here
+ * ```
+ts
+ *
+const d= el("div");
+*
+const f= (a: HTMLDivElement)=> a;
+* f(d);
+//←
+ * document.head.append( //←
+ * 	el("script", { src: "https://flems.io/flems.html", type: "text/javascript", charset: "utf-8" }),
+ * );
+* ```
+ * TODO for SVG
+ * */
 type ddeAppend<el>= (...nodes: (Node | string)[])=> el;
 declare global{
 	interface HTMLAnchorElement{
@@ -493,8 +521,7 @@ interface S {
 	 * */
 	el<S extends any>(signal: Signal<S, any>, el: (v: S)=> Element | Element[]): DocumentFragment;
 
-	/** Mirrors element attributes for current host (both way).  */
+    fromAttribute<T>(element: HTMLElement, name: string, value?: T): Signal<T, {}>;
-	attribute<T>(name: string, initial?: T): Signal<T, {}>
 }
 export const S: S;
 declare global {

dist/esm.d.ts

@@ -166,6 +166,34 @@ export const scope: {
 	pop(): ReturnType<Array<Scope>["pop"]>,
 };
 
+/*
+ * TODO TypeScript HACK (better way?)
+ * this doesnt works
+ * ```ts
+ * interface element<el> extends Node{
+ * 	prototype: el;
+ * 	append(...els: (SupportedElement | DocumentFragment | string | element<SupportedElement | DocumentFragment>)[]): el
+ * }
+ *
+export function el<T>(
+ * 	tag_name?: "<>",
+ * ): element<DocumentFragment>
+* ```
+ * …as its complains here
+ * ```
+ts
+ *
+const d= el("div");
+*
+const f= (a: HTMLDivElement)=> a;
+* f(d);
+//←
+ * document.head.append( //←
+ * 	el("script", { src: "https://flems.io/flems.html", type: "text/javascript", charset: "utf-8" }),
+ * );
+* ```
+ * TODO for SVG
+ * */
 type ddeAppend<el>= (...nodes: (Node | string)[])=> el;
 declare global{
 	interface HTMLAnchorElement{

examples/components/webComponent.js

@@ -1,14 +1,9 @@
 import { el, on, scope } from "../../index.js";
 import { S } from "../../signals.js";
-const { hasOwnProperty }= Object.prototype;
 
 /**
- * @typedef CustomHTMLTestElementInterface
+ * Compatible with `npx -y web-component-analyzer examples/components/webComponent.js`
- * @type {object}
+ * @element custom-test
- * @property {string} name
- * */
-/**
- * Compatible with `npx-wca test/components/webComponent.js`
  * */
 export class CustomHTMLTestElement extends HTMLElement{
 	static tagName= "custom-test";
@@ -16,32 +11,34 @@ export class CustomHTMLTestElement extends HTMLElement{
 		return [ "name", "pre-name" ];
 	}
 	connectedCallback(){
+		if(!this.hasAttribute("pre-name")) this.setAttribute("pre-name", "default");
 		this.attachShadow({ mode: "open" }).append(
-			customElementRender(this, this.render)
+			customElementRender(this, this.render, observedAttributes(S))
 		);
 	}
 
-	render({ test }){
+	render({ name, preName }){
+		const { host }= scope;
+		const { test }= host();
 		console.log(scope.state);
-		scope.host(
+		host(
 			on.connected(()=> console.log(CustomHTMLTestElement)),
 			on.attributeChanged(e=> console.log(e)),
 			on.disconnected(()=> console.log(CustomHTMLTestElement))
 		);
 		
-		const name= S.attribute("name");
-		const preName= S.attribute("pre-name");
 		console.log({ name, test, preName});
 		return el("p").append(
 			el("#text", name),
-			el("#text", test),
 			el("#text", preName),
 			el("button", { type: "button", textContent: "pre-name", onclick: ()=> preName("Ahoj") })
 		);
 	}
+	test= "A";
 	
 	get name(){ return this.getAttribute("name"); }
 	set name(value){ this.setAttribute("name", value); }
+	/** @attr pre-name */
 	get preName(){ return this.getAttribute("pre-name"); }
 	set preName(value){ this.setAttribute("pre-name", value); }
 }
@@ -49,12 +46,25 @@ export class CustomHTMLTestElement extends HTMLElement{
 lifecycleToEvents(CustomHTMLTestElement)
 customElements.define(CustomHTMLTestElement.tagName, CustomHTMLTestElement);
 
-function customElementRender(_this, render){
+function customElementRender(_this, render, props){
+	console.log(_this.shadowRoot, _this.childList);
 	scope.push({ scope: _this, host: (...c)=> c.length ? c.forEach(c=> c(_this)) : _this, custom_element: _this });
-	const out= render(_this);
+	if(typeof props==="function") props= props(_this);
+	const out= render(props);
 	scope.pop();
 	return out;
 }
+function observedAttributes(options, element){
+	const fromAttribute= typeof options==="undefined" ? (_1, _2, v)=> v : ( options.fromAttribute || options );
+	if(!element) return observedAttributes.bind(null, fromAttribute)
+	return Object.fromEntries(
+		element.constructor.observedAttributes
+		.map(name=> [
+			name.replace(/-./g, m=> m.slice(1).toUpperCase()),
+			fromAttribute(element, name, element.getAttribute(name))
+		])
+	);
+}
 function lifecycleToEvents(class_declaration){
 	for (const name of [ "connected", "disconnected" ])
 		wrapMethod(class_declaration.prototype, name+"Callback", function(target, thisArg, detail){
@@ -70,6 +80,7 @@ function lifecycleToEvents(class_declaration){
 		target.apply(thisArg, detail);
 	});
 	class_declaration.prototype.__dde_lifecycleToEvents= true;
+	return class_declaration;
 }
 function wrapMethod(obj, method, apply){
 	obj[method]= new Proxy(obj[method] || (()=> {}), { apply });

signals.d.ts

@@ -54,8 +54,7 @@ interface S {
 	 * */
 	el<S extends any>(signal: Signal<S, any>, el: (v: S)=> Element | Element[]): DocumentFragment;
 
-	/** Mirrors element attributes for current host (both way).  */
+    fromAttribute<T>(element: HTMLElement, name: string, value?: T): Signal<T, {}>;
-	attribute<T>(name: string, initial?: T): Signal<T, {}>
 }
 export const S: S;
 declare global {

src/signals-lib.js

@@ -62,50 +62,6 @@ S.symbols= {
 	signal: mark,
 	onclear: Symbol.for("Signal.onclear")
 };
-import { on } from "./events.js";
-import { scope } from "./dom.js";
-const key_attributes= "__dde_attributes";
-S.attribute= function(name, initial= undefined){
-	const out= S(initial);
-	let host;
-	scope.host(element=> {
-		host= element;
-		if(element instanceof HTMLElement){
-			if(element.hasAttribute(name)) out(element.getAttribute(name));
-		} else {
-			if(element.hasAttributeNS(null, name)) out(element.getAttributeNS(null, name));
-		}
-		if(element[key_attributes]){
-			element[key_attributes][name]= out;
-			return;
-		}
-		element[key_attributes]= { [name]: out };
-		on.attributeChanged(function attributeChangeToSignal({ detail }){
-			/*! This maps attributes to signals (`S.attribute`).
-			 * Investigate `__dde_attributes` key of the element.*/
-			const [ name, value ]= detail;
-			const curr= element[key_attributes][name];
-			if(curr) return curr(value);
-		})(element);
-		on.disconnected(function(){
-			/*! This removes all signals mapped to attributes (`S.attribute`).
-			 * Investigate `__dde_attributes` key of the element.*/
-			S.clear(...Object.values(element[key_attributes]));
-			host= null;
-		})(element);
-		return element;
-	});
-	return new Proxy(out, {
-		apply(target, _, args){
-			if(!args.length) return target();
-			if(!host) return;
-			const value= args[0];
-			if(host instanceof HTMLElement)
-				return host.setAttribute(name, value);
-			return host.setAttributeNS(null, name, value);
-		}
-	});
-};
 S.clear= function(...signals){
 	for(const signal of signals){
 		Reflect.deleteProperty(signal, "toJSON");
@@ -130,6 +86,7 @@ S.clear= function(...signals){
 };
 const key_reactive= "__dde_reactive";
 import { el } from "./dom.js";
+import { scope } from "./dom.js";
 S.el= function(signal, map){
 	const mark_start= el.mark({ type: "reactive" }, false);
 	const mark_end= mark_start.end;
@@ -154,6 +111,34 @@ S.el= function(signal, map){
 	reRenderReactiveElement(signal());
 	return out;
 };
+import { on } from "./events.js";
+const key_attributes= "__dde_attributes";
+S.fromAttribute= function(element, name, value){
+	if(!element[key_attributes]){ // needs registration
+		element[key_attributes]= {};
+		on.attributeChanged(function attributeChangeToSignal({ detail }){
+			/*! This maps attributes to signals (`S.attribute`).
+			 * Investigate `__dde_attributes` key of the element.*/
+			const [ name, value ]= detail;
+			const curr= element[key_attributes][name];
+			if(curr) return curr(value);
+		})(element);
+		on.disconnected(function(){
+			/*! This removes all signals mapped to attributes (`S.attribute`).
+			 * Investigate `__dde_attributes` key of the element.*/
+			S.clear(...Object.values(element[key_attributes]));
+		})(element);
+	}
+	const store= element[key_attributes];
+	const out= Reflect.has(store, name) ? Reflect.get(store, name) : (store[name]= S(value));
+	return new Proxy(out, {
+		apply(target, _, args){
+			if(!args.length) return target();
+			const value= args[0];
+			return element.setAttribute(name, value);
+		}
+	});
+};
 
 import { typeOf } from './helpers.js';
 export const signals_config= {