// src/helpers.js
var hasOwn = (...a) => Object.prototype.hasOwnProperty.call(...a);
function isUndef(value) {
	return typeof value === "undefined";
}
function isInstance(obj, cls) {
	return obj instanceof cls;
}
function isProtoFrom(obj, cls) {
	return Object.prototype.isPrototypeOf.call(cls, obj);
}
function oCreate(proto = null, p = {}) {
	return Object.create(proto, p);
}
function oAssign(...o) {
	return Object.assign(...o);
}
function onAbort(signal, listener) {
	if (!signal || !isInstance(signal, AbortSignal))
		return true;
	if (signal.aborted)
		return;
	signal.addEventListener("abort", listener);
	return function cleanUp() {
		signal.removeEventListener("abort", listener);
	};
}

// src/signals-lib/common.js
var signals_global = {
	/**
	* Checks if a value is a signal
	* @param {any} attributes - Value to check
	* @returns {boolean} Whether the value is a signal
	*/
	isSignal(attributes) {
		return false;
	},
	/**
	* Processes an attribute that might be reactive
	* @param {Element} obj - Element that owns the attribute
	* @param {string} key - Attribute name
	* @param {any} attr - Attribute value
	* @param {Function} set - Function to set the attribute
	* @returns {any} Processed attribute value
	*/
	processReactiveAttribute(obj, key, attr, set) {
		return attr;
	}
};
function registerReactivity(def, global = true) {
	if (global) return oAssign(signals_global, def);
	Object.setPrototypeOf(def, signals_global);
	return def;
}
function signals(_this) {
	return isProtoFrom(_this, signals_global) && _this !== signals_global ? _this : signals_global;
}

// src/dom-common.js
var enviroment = {
	setDeleteAttr,
	ssr: "",
	D: globalThis.document,
	N: globalThis.Node,
	F: globalThis.DocumentFragment,
	H: globalThis.HTMLElement,
	S: globalThis.SVGElement,
	M: globalThis.MutationObserver,
	q: (p) => p || Promise.resolve()
};
function setDeleteAttr(obj, prop, val) {
	Reflect.set(obj, prop, val);
	if (!isUndef(val)) return;
	Reflect.deleteProperty(obj, prop);
	if (isInstance(obj, enviroment.H) && obj.getAttribute(prop) === "undefined")
		return obj.removeAttribute(prop);
	if (Reflect.get(obj, prop) === "undefined")
		return Reflect.set(obj, prop, "");
}
var keyLTE = "__dde_lifecyclesToEvents";
var evc = "dde:connected";
var evd = "dde:disconnected";
var eva = "dde:attributeChanged";

// src/events-observer.js
var c_ch_o = enviroment.M ? connectionsChangesObserverConstructor() : new Proxy({}, {
	get() {
		return () => {
		};
	}
});
function connectionsChangesObserverConstructor() {
	const store = /* @__PURE__ */ new Map();
	let is_observing = false;
	const observerListener = (stop2) => function(mutations) {
		for (const mutation of mutations) {
			if (mutation.type !== "childList") continue;
			if (observerAdded(mutation.addedNodes, true)) {
				stop2();
				continue;
			}
			if (observerRemoved(mutation.removedNodes, true))
				stop2();
		}
	};
	const observer = new enviroment.M(observerListener(stop));
	return {
		/**
		* Creates an observer for a specific element
		* @param {Element} element - Element to observe
		* @returns {Function} Cleanup function
		*/
		observe(element) {
			const o = new enviroment.M(observerListener(() => {
			}));
			o.observe(element, { childList: true, subtree: true });
			return () => o.disconnect();
		},
		/**
		* Register a connection listener for an element
		* @param {Element} element - Element to watch
		* @param {Function} listener - Callback for connection event
		*/
		onConnected(element, listener) {
			start();
			const listeners = getElementStore(element);
			if (listeners.connected.has(listener)) return;
			listeners.connected.add(listener);
			listeners.length_c += 1;
		},
		/**
		* Unregister a connection listener
		* @param {Element} element - Element being watched
		* @param {Function} listener - Callback to remove
		*/
		offConnected(element, listener) {
			if (!store.has(element)) return;
			const ls = store.get(element);
			if (!ls.connected.has(listener)) return;
			ls.connected.delete(listener);
			ls.length_c -= 1;
			cleanWhenOff(element, ls);
		},
		/**
		* Register a disconnection listener for an element
		* @param {Element} element - Element to watch
		* @param {Function} listener - Callback for disconnection event
		*/
		onDisconnected(element, listener) {
			start();
			const listeners = getElementStore(element);
			if (listeners.disconnected.has(listener)) return;
			listeners.disconnected.add(listener);
			listeners.length_d += 1;
		},
		/**
		* Unregister a disconnection listener
		* @param {Element} element - Element being watched
		* @param {Function} listener - Callback to remove
		*/
		offDisconnected(element, listener) {
			if (!store.has(element)) return;
			const ls = store.get(element);
			ls.disconnected.delete(listener);
			ls.length_d -= 1;
			cleanWhenOff(element, ls);
		}
	};
	function cleanWhenOff(element, ls) {
		if (ls.length_c || ls.length_d)
			return;
		store.delete(element);
		stop();
	}
	function getElementStore(element) {
		if (store.has(element)) return store.get(element);
		const out = {
			connected: /* @__PURE__ */ new WeakSet(),
			length_c: 0,
			disconnected: /* @__PURE__ */ new WeakSet(),
			length_d: 0
		};
		store.set(element, out);
		return out;
	}
	function start() {
		if (is_observing) return;
		is_observing = true;
		observer.observe(enviroment.D.body, { childList: true, subtree: true });
	}
	function stop() {
		if (!is_observing || store.size) return;
		is_observing = false;
		observer.disconnect();
	}
	function requestIdle() {
		return new Promise(function(resolve) {
			(requestIdleCallback || requestAnimationFrame)(resolve);
		});
	}
	async function collectChildren(element) {
		if (store.size > 30)
			await requestIdle();
		const out = [];
		if (!isInstance(element, enviroment.N)) return out;
		for (const el of store.keys()) {
			if (el === element || !isInstance(el, enviroment.N)) continue;
			if (element.contains(el))
				out.push(el);
		}
		return out;
	}
	function observerAdded(addedNodes, is_root) {
		let out = false;
		for (const element of addedNodes) {
			if (is_root) collectChildren(element).then(observerAdded);
			if (!store.has(element)) continue;
			const ls = store.get(element);
			if (!ls.length_c) continue;
			element.dispatchEvent(new Event(evc));
			ls.connected = /* @__PURE__ */ new WeakSet();
			ls.length_c = 0;
			if (!ls.length_d) store.delete(element);
			out = true;
		}
		return out;
	}
	function observerRemoved(removedNodes, is_root) {
		let out = false;
		for (const element of removedNodes) {
			if (is_root) collectChildren(element).then(observerRemoved);
			if (!store.has(element)) continue;
			const ls = store.get(element);
			if (!ls.length_d) continue;
			(globalThis.queueMicrotask || setTimeout)(dispatchRemove(element));
			out = true;
		}
		return out;
	}
	function dispatchRemove(element) {
		return () => {
			if (element.isConnected) return;
			element.dispatchEvent(new Event(evd));
			store.delete(element);
		};
	}
}

// src/events.js
function dispatchEvent(name, options, host) {
	if (typeof options === "function") {
		host = options;
		options = null;
	}
	if (!options) options = {};
	return function dispatch(element, ...d) {
		if (host) {
			d.unshift(element);
			element = typeof host === "function" ? host() : host;
		}
		const event = d.length ? new CustomEvent(name, oAssign({ detail: d[0] }, options)) : new Event(name, options);
		return element.dispatchEvent(event);
	};
}
function on(event, listener, options) {
	return function registerElement(element) {
		element.addEventListener(event, listener, options);
		return element;
	};
}
var lifeOptions = (obj) => oAssign({}, typeof obj === "object" ? obj : null, { once: true });
on.connected = function(listener, options) {
	options = lifeOptions(options);
	return function registerElement(element) {
		element.addEventListener(evc, listener, options);
		if (element[keyLTE]) return element;
		if (element.isConnected) return element.dispatchEvent(new Event(evc)), element;
		const c = onAbort(options.signal, () => c_ch_o.offConnected(element, listener));
		if (c) c_ch_o.onConnected(element, listener);
		return element;
	};
};
on.disconnected = function(listener, options) {
	options = lifeOptions(options);
	return function registerElement(element) {
		element.addEventListener(evd, listener, options);
		if (element[keyLTE]) return element;
		const c = onAbort(options.signal, () => c_ch_o.offDisconnected(element, listener));
		if (c) c_ch_o.onDisconnected(element, listener);
		return element;
	};
};

// src/dom.js
function queue(promise) {
	return enviroment.q(promise);
}
var scopes = [{
	get scope() {
		return enviroment.D.body;
	},
	host: (c) => c ? c(enviroment.D.body) : enviroment.D.body,
	prevent: true
}];
var store_abort = /* @__PURE__ */ new WeakMap();
var scope = {
	/**
	* Gets the current scope
	* @returns {Object} Current scope context
	*/
	get current() {
		return scopes[scopes.length - 1];
	},
	/**
	* Gets the host element of the current scope
	* @returns {Function} Host accessor function
	*/
	get host() {
		return this.current.host;
	},
	/**
	* Creates/gets an AbortController that triggers when the element disconnects
	* */
	get signal() {
		const { host } = this;
		if (store_abort.has(host)) return store_abort.get(host);
		const a = new AbortController();
		store_abort.set(host, a);
		host(on.disconnected(() => a.abort()));
		return a.signal;
	},
	/**
	* Prevents default behavior in the current scope
	* @returns {Object} Current scope context
	*/
	preventDefault() {
		const { current } = this;
		current.prevent = true;
		return current;
	},
	/**
	* Gets a copy of the current scope stack
	* @returns {Array} Copy of scope stack
	*/
	get state() {
		return [...scopes];
	},
	/**
	* Pushes a new scope to the stack
	* @param {Object} [s={}] - Scope object to push
	* @returns {number} New length of the scope stack
	*/
	push(s = {}) {
		return scopes.push(oAssign({}, this.current, { prevent: false }, s));
	},
	/**
	* Pushes the root scope to the stack
	* @returns {number} New length of the scope stack
	*/
	pushRoot() {
		return scopes.push(scopes[0]);
	},
	/**
	* Pops the current scope from the stack
	* @returns {Object|undefined} Popped scope or undefined if only one scope remains
	*/
	pop() {
		if (scopes.length === 1) return;
		return scopes.pop();
	}
};
function append(...els) {
	this.appendOriginal(...els);
	return this;
}
function chainableAppend(el) {
	if (el.append === append) return el;
	el.appendOriginal = el.append;
	el.append = append;
	return el;
}
var namespace;
function createElement(tag, attributes, ...addons) {
	const s = signals(this);
	let scoped = 0;
	let el, el_host;
	if (Object(attributes) !== attributes || s.isSignal(attributes))
		attributes = { textContent: attributes };
	switch (true) {
		case typeof tag === "function": {
			scoped = 1;
			const host = (...c) => !c.length ? el_host : (scoped === 1 ? addons.unshift(...c) : c.forEach((c2) => c2(el_host)), void 0);
			scope.push({ scope: tag, host });
			el = tag(attributes || void 0);
			const is_fragment = isInstance(el, enviroment.F);
			if (el.nodeName === "#comment") break;
			const el_mark = createElement.mark({
				type: "component",
				name: tag.name,
				host: is_fragment ? "this" : "parentElement"
			});
			el.prepend(el_mark);
			if (is_fragment) el_host = el_mark;
			break;
		}
		case tag === "#text":
			el = assign.call(this, enviroment.D.createTextNode(""), attributes);
			break;
		case (tag === "<>" || !tag):
			el = assign.call(this, enviroment.D.createDocumentFragment(), attributes);
			break;
		case Boolean(namespace):
			el = assign.call(this, enviroment.D.createElementNS(namespace, tag), attributes);
			break;
		case !el:
			el = assign.call(this, enviroment.D.createElement(tag), attributes);
	}
	chainableAppend(el);
	if (!el_host) el_host = el;
	addons.forEach((c) => c(el_host));
	if (scoped) scope.pop();
	scoped = 2;
	return el;
}
createElement.mark = function(attrs, is_open = false) {
	attrs = Object.entries(attrs).map(([n, v]) => n + `="${v}"`).join(" ");
	const end = is_open ? "" : "/";
	const out = enviroment.D.createComment(`<dde:mark ${attrs}${enviroment.ssr}${end}>`);
	if (is_open) out.end = enviroment.D.createComment("</dde:mark>");
	return out;
};
function createElementNS(ns) {
	const _this = this;
	return function createElementNSCurried(...rest) {
		namespace = ns;
		const el = createElement.call(_this, ...rest);
		namespace = void 0;
		return el;
	};
}
function simulateSlots(element, root = element) {
	const mark_e = "\xB9\u2070", mark_s = "\u2713";
	const slots = Object.fromEntries(
		Array.from(root.querySelectorAll("slot")).filter((s) => !s.name.endsWith(mark_e)).map((s) => [s.name += mark_e, s])
	);
	element.append = new Proxy(element.append, {
		apply(orig, _, els) {
			if (els[0] === root) return orig.apply(element, els);
			for (const el of els) {
				const name = (el.slot || "") + mark_e;
				try {
					elementAttribute(el, "remove", "slot");
				} catch (_error) {
				}
				const slot = slots[name];
				if (!slot) return;
				if (!slot.name.startsWith(mark_s)) {
					slot.childNodes.forEach((c) => c.remove());
					slot.name = mark_s + name;
				}
				slot.append(el);
			}
			element.append = orig;
			return element;
		}
	});
	if (element !== root) {
		const els = Array.from(element.childNodes);
		element.append(...els);
	}
	return root;
}
var assign_context = /* @__PURE__ */ new WeakMap();
var { setDeleteAttr: setDeleteAttr2 } = enviroment;
function assign(element, ...attributes) {
	if (!attributes.length) return element;
	assign_context.set(element, assignContext(element, this));
	for (const [key, value] of Object.entries(oAssign({}, ...attributes)))
		assignAttribute.call(this, element, key, value);
	assign_context.delete(element);
	return element;
}
function assignAttribute(element, key, value) {
	const { setRemoveAttr, s } = assignContext(element, this);
	const _this = this;
	value = s.processReactiveAttribute(
		element,
		key,
		value,
		(key2, value2) => assignAttribute.call(_this, element, key2, value2)
	);
	const [k] = key;
	if ("=" === k) return setRemoveAttr(key.slice(1), value);
	if ("." === k) return setDelete(element, key.slice(1), value);
	if (/(aria|data)([A-Z])/.test(key)) {
		key = key.replace(/([a-z])([A-Z])/g, "$1-$2").toLowerCase();
		return setRemoveAttr(key, value);
	}
	if ("className" === key) key = "class";
	switch (key) {
		case "xlink:href":
			return setRemoveAttr(key, value, "http://www.w3.org/1999/xlink");
		case "textContent":
			return setDeleteAttr2(element, key, value);
		case "style":
			if (typeof value !== "object") break;
		/* falls through */
		case "dataset":
			return forEachEntries(s, key, element, value, setDelete.bind(null, element[key]));
		case "ariaset":
			return forEachEntries(s, key, element, value, (key2, val) => setRemoveAttr("aria-" + key2, val));
		case "classList":
			return classListDeclarative.call(_this, element, value);
	}
	return isPropSetter(element, key) ? setDeleteAttr2(element, key, value) : setRemoveAttr(key, value);
}
function assignContext(element, _this) {
	if (assign_context.has(element)) return assign_context.get(element);
	const is_svg = isInstance(element, enviroment.S);
	const setRemoveAttr = (is_svg ? setRemoveNS : setRemove).bind(null, element, "Attribute");
	const s = signals(_this);
	return { setRemoveAttr, s };
}
function classListDeclarative(element, toggle) {
	const s = signals(this);
	forEachEntries(
		s,
		"classList",
		element,
		toggle,
		(class_name, val) => element.classList.toggle(class_name, val === -1 ? void 0 : Boolean(val))
	);
	return element;
}
function elementAttribute(element, op, key, value) {
	if (isInstance(element, enviroment.H))
		return element[op + "Attribute"](key, value);
	return element[op + "AttributeNS"](null, key, value);
}
function isPropSetter(el, key) {
	if (!(key in el)) return false;
	const des = getPropDescriptor(el, key);
	return !isUndef(des.set);
}
function getPropDescriptor(p, key) {
	p = Object.getPrototypeOf(p);
	if (!p) return {};
	const des = Object.getOwnPropertyDescriptor(p, key);
	if (!des) return getPropDescriptor(p, key);
	return des;
}
function forEachEntries(s, target, element, obj, cb) {
	const S = String;
	if (typeof obj !== "object" || obj === null) return;
	return Object.entries(obj).forEach(function process([key, val]) {
		if (!key) return;
		key = new S(key);
		key.target = target;
		val = s.processReactiveAttribute(element, key, val, cb);
		cb(key, val);
	});
}
function setRemove(obj, prop, key, val) {
	return obj[(isUndef(val) ? "remove" : "set") + prop](key, val);
}
function setRemoveNS(obj, prop, key, val, ns = null) {
	return obj[(isUndef(val) ? "remove" : "set") + prop + "NS"](ns, key, val);
}
function setDelete(obj, key, val) {
	Reflect.set(obj, key, val);
	if (!isUndef(val)) return;
	return Reflect.deleteProperty(obj, key);
}

// src/customElement.js
function customElementRender(target, render, props = {}) {
	const custom_element = target.host || target;
	scope.push({
		scope: custom_element,
		host: (...c) => c.length ? c.forEach((c2) => c2(custom_element)) : custom_element
	});
	if (typeof props === "function") props = props.call(custom_element, custom_element);
	const is_lte = custom_element[keyLTE];
	if (!is_lte) lifecyclesToEvents(custom_element);
	const out = render.call(custom_element, props);
	if (!is_lte) custom_element.dispatchEvent(new Event(evc));
	if (target.nodeType === 11 && typeof target.mode === "string")
		custom_element.addEventListener(evd, c_ch_o.observe(target), { once: true });
	scope.pop();
	return target.append(out);
}
function lifecyclesToEvents(class_declaration) {
	wrapMethod(class_declaration.prototype, "connectedCallback", function(target, thisArg, detail) {
		target.apply(thisArg, detail);
		thisArg.dispatchEvent(new Event(evc));
	});
	wrapMethod(class_declaration.prototype, "disconnectedCallback", function(target, thisArg, detail) {
		target.apply(thisArg, detail);
		(globalThis.queueMicrotask || setTimeout)(
			() => !thisArg.isConnected && thisArg.dispatchEvent(new Event(evd))
		);
	});
	wrapMethod(class_declaration.prototype, "attributeChangedCallback", function(target, thisArg, detail) {
		const [attribute, , value] = detail;
		thisArg.dispatchEvent(new CustomEvent(eva, {
			detail: [attribute, value]
		}));
		target.apply(thisArg, detail);
	});
	class_declaration.prototype[keyLTE] = true;
	return class_declaration;
}
function wrapMethod(obj, method, apply) {
	obj[method] = new Proxy(obj[method] || (() => {
	}), { apply });
}

// src/memo.js
var memoMark = "__dde_memo";
var memo_scope = [];
function memo(key, generator) {
	if (!memo_scope.length) return generator(key);
	const k = typeof key === "object" ? JSON.stringify(key) : key;
	const [{ cache, after }] = memo_scope;
	return after(k, hasOwn(cache, k) ? cache[k] : generator(key));
}
memo.isScope = function(obj) {
	return obj[memoMark];
};
memo.scope = function memoScope(fun, { signal, onlyLast } = {}) {
	let cache = oCreate();
	function memoScope2(...args) {
		if (signal && signal.aborted)
			return fun.apply(this, args);
		let cache_local = onlyLast ? cache : oCreate();
		memo_scope.unshift({
			cache,
			after(key, val) {
				return cache_local[key] = val;
			}
		});
		const out = fun.apply(this, args);
		memo_scope.shift();
		cache = cache_local;
		return out;
	}
	memoScope2[memoMark] = true;
	memoScope2.clear = () => cache = oCreate();
	if (signal) signal.addEventListener("abort", memoScope2.clear);
	return memoScope2;
};
export {
	assign,
	assignAttribute,
	chainableAppend,
	classListDeclarative,
	createElement,
	createElementNS,
	customElementRender,
	lifecyclesToEvents as customElementWithDDE,
	dispatchEvent,
	createElement as el,
	createElementNS as elNS,
	elementAttribute,
	lifecyclesToEvents,
	memo,
	on,
	queue,
	registerReactivity,
	scope,
	simulateSlots
};