🧱 move components, exports, and index files to examples directory

2025-07-29 07:00:16 +02:00 · 2023-09-26 09:40:00 +02:00
parent 3823abc2d7
commit 7417565fa5
7 changed files with 7 additions and 1 deletions
--- a/examples/components/webComponent.js
+++ b/examples/components/webComponent.js
@@ -0,0 +1,122 @@
+import { el } from "../../index.js";
+import { S } from "../../signals.js";
+const { hasOwnProperty }= Object.prototype;
+
+const store= attrsPropsToSignals([ "test" ]);
+/**
+ * Compatible with `npx-wca test/components/webComponent.js`
+ * */
+export class CustomHTMLTestElement extends HTMLElement{
+	static get observedAttributes(){
+		return [ "name", "pre-name" ];
+	}
+	connectedCallback(){
+		this.attachShadow({ mode: "open" }).append(
+			customElementRender(this, store.toRender(this), this.render)
+		);
+	}
+
+	render({ name, test, preName }, host){
+		host(on.connected(console.log));
+		return el("p").append(
+			el("#text", { textContent: name }),
+			el("#text", { textContent: test }),
+			el("#text", { textContent: preName }),
+		);
+	}
+}
+// https://gist.github.com/WebReflection/ec9f6687842aa385477c4afca625bbf4
+customElementsAssign(
+	CustomHTMLTestElement,
+	reflectObservedAttributes,
+	lifecycleToEvents(false),
+	store.connect
+);
+customElements.define("custom-test", CustomHTMLTestElement);
+
+function customElementRender(_this, attrs, render){
+	const host= (...a)=> a.length ? a[0](_this) : _this;
+	return render(attrs, host);
+}
+/** @returns {HTMLElement} */
+function customElementsAssign(class_base, ...automatize){
+	automatize.forEach(a=> a(class_base));
+}
+function reflectObservedAttributes(c){
+	for(const name of c.observedAttributes){
+		const name_camel= name.replace(/([a-z])-([a-z])/g, (_, l, r)=> l+r.toUpperCase());
+		if(hasOwnProperty.call(c.prototype, name_camel))
+			continue;
+		Reflect.defineProperty(c.prototype, name_camel, {
+			get(){ return this.getAttribute(name); },
+			set(value){ this.setAttribute(name, value); }
+		});
+	}
+}
+function lifecycleToEvents(is_attrs){
+	return function(c){
+		wrapMethod(c.prototype, "connectedCallback", function(target, thisArg, detail){
+			target.apply(thisArg, detail);
+			thisArg.dispatchEvent(new Event("dde:connected"));
+		});
+		wrapMethod(c.prototype, "disconnectedCallback", function(target, thisArg, detail){
+			target.apply(thisArg, detail);
+			thisArg.dispatchEvent(new Event("dde:disconnected"));
+		});
+		if(is_attrs)
+			wrapMethod(c.prototype, "attributeChangedCallback", function(target, thisArg, detail){
+				thisArg.dispatchEvent(new CustomEvent("dde:attribute", { detail }));
+				target.apply(thisArg, detail);
+			});
+	};
+}
+function attrsPropsToSignals(props= []){
+	const store_attrs= new WeakMap();
+	const store_props= new WeakMap();
+	return {
+		toRender(target){
+			const out= {};
+			const sattrs= get(store_attrs, target);
+			target.constructor.observedAttributes.forEach(function(name){
+				const name_camel= name.replace(/([a-z])-([a-z])/g, (_, l, r)=> l+r.toUpperCase());
+				if(!hasOwnProperty.call(sattrs, name)) sattrs[name]= S(undefined);
+				out[name_camel]= sattrs[name];
+			});
+			const sprops= get(store_props, target);
+			props.forEach(p=> !hasOwnProperty.call(sprops, p) && (sprops[p]= S(undefined)));
+			return Object.assign(out, sprops);
+		},
+		connect(c){
+			wrapMethod(c.prototype, "attributeChangedCallback", function(target, thisArg, detail){
+				const [ name, _, value ]= detail;
+				const s= get(store_attrs, thisArg);
+				if(s[name]) s[name](value);
+				else s[name]= S(value);
+				
+				target.apply(thisArg, detail);
+			});
+			for(const name of props){
+				Reflect.defineProperty(c.prototype, name, {
+					get(){
+						const s= get(store_props, this);
+						if(s[name]) return s[name]();
+					},
+					set(value){
+						const s= get(store_props, this);
+						if(s[name]) s[name](value);
+						else s[name]= S(value);
+					}
+				});
+			}
+		}
+	};
+	function get(store, t){
+		if(store.has(t)) return store.get(t);
+		const s= {};
+		store.set(t, s);
+		return s;
+	}
+}
+function wrapMethod(obj, method, apply){
+	obj[method]= new Proxy(obj[method] || (()=> {}), { apply });
+}