diff --git a/dist/dde-with-signals.js b/dist/dde-with-signals.js
index a716f22..b88d49c 100644
--- a/dist/dde-with-signals.js
+++ b/dist/dde-with-signals.js
@@ -1,7 +1,7 @@
 //deka-dom-el library is available via global namespace `dde`
 (()=> {
 	// src/signals-common.js
-	var x = {
+	var w = {
 		isSignal(t) {
 			return !1;
 		},
@@ -9,22 +9,22 @@
 			return n;
 		}
 	};
-	function P(t, e = !0) {
-		return e ? Object.assign(x, t) : (Object.setPrototypeOf(t, x), t);
+	function j(t, e = !0) {
+		return e ? Object.assign(w, t) : (Object.setPrototypeOf(t, w), t);
 	}
-	function S(t) {
-		return x.isPrototypeOf(t) && t !== x ? t : x;
+	function A(t) {
+		return w.isPrototypeOf(t) && t !== w ? t : w;
 	}
 	
 	// src/helpers.js
 	function E(t) {
 		return typeof t > "u";
 	}
-	function M(t) {
+	function k(t) {
 		let e = typeof t;
 		return e !== "object" ? e : t === null ? "null" : Object.prototype.toString.call(t);
 	}
-	function A(t, e) {
+	function O(t, e) {
 		if (!t || !(t instanceof AbortSignal))
 			return !0;
 		if (!t.aborted)
@@ -34,8 +34,8 @@
 	}
 	
 	// src/dom-common.js
-	var W = { setDeleteAttr: Z };
-	function Z(t, e, n) {
+	var F = { setDeleteAttr: Q };
+	function Q(t, e, n) {
 		if (Reflect.set(t, e, n), !!E(n)) {
 			if (Reflect.deleteProperty(t, e), t instanceof HTMLElement && t.getAttribute(e) === "undefined")
 				return t.removeAttribute(e);
@@ -50,7 +50,7 @@
 		namespace: "html",
 		host: (t) => t ? t(document.body) : document.body,
 		prevent: !0
-	}], F = (t) => t === "svg" ? "http://www.w3.org/2000/svg" : t, m = {
+	}], z = (t) => t === "svg" ? "http://www.w3.org/2000/svg" : t, h = {
 		get current() {
 			return y[y.length - 1];
 		},
@@ -61,7 +61,7 @@
 			return this.current.namespace;
 		},
 		set namespace(t) {
-			return this.current.namespace = F(t);
+			return this.current.namespace = z(t);
 		},
 		preventDefault() {
 			let { current: t } = this;
@@ -71,7 +71,7 @@
 			let e = this.namespace;
 			return this.namespace = t, {
 				append(...n) {
-					return m.namespace = e, n.length === 1 ? n[0] : document.createDocumentFragment().append(...n);
+					return h.namespace = e, n.length === 1 ? n[0] : document.createDocumentFragment().append(...n);
 				}
 			};
 		},
@@ -79,17 +79,17 @@
 			return [...y];
 		},
 		push(t = {}) {
-			return t.namespace && (t.namespace = F(t.namespace)), y.push(Object.assign({}, this.current, { prevent: !1 }, t));
+			return t.namespace && (t.namespace = z(t.namespace)), y.push(Object.assign({}, this.current, { prevent: !1 }, t));
 		},
 		pop() {
 			return y.pop();
 		}
 	};
-	function at(t, e, ...n) {
-		let o = S(this), { namespace: r } = m, c = 0, s;
+	function pt(t, e, ...n) {
+		let o = A(this), { namespace: r } = h, c = 0, s;
 		switch ((Object(e) !== e || o.isSignal(e)) && (e = { textContent: e }), !0) {
 			case typeof t == "function": {
-				c = 1, m.push({ scope: t, host: (a) => a ? (c === 1 ? n.unshift(a) : a(s), void 0) : s }), s = t(e || void 0), (s instanceof HTMLElement ? B : G)(s, "Attribute", "dde-fun", t.name);
+				c = 1, h.push({ scope: t, host: (a) => a ? (c === 1 ? n.unshift(a) : a(s), void 0) : s }), s = t(e || void 0), (s instanceof HTMLElement ? I : J)(s, "Attribute", "dde-fun", t.name);
 				break;
 			}
 			case t === "#text":
@@ -104,100 +104,100 @@
 			case !s:
 				s = R.call(this, document.createElement(t), e);
 		}
-		return n.forEach((a) => a(s)), c && m.pop(), c = 2, s;
+		return n.forEach((a) => a(s)), c && h.pop(), c = 2, s;
 	}
-	var { setDeleteAttr: z } = W, O = /* @__PURE__ */ new WeakMap();
+	var { setDeleteAttr: H } = F, C = /* @__PURE__ */ new WeakMap();
 	function R(t, ...e) {
 		if (!e.length)
 			return t;
-		O.set(t, U(t, this));
+		C.set(t, q(t, this));
 		for (let [n, o] of Object.entries(Object.assign({}, ...e)))
-			H.call(this, t, n, o);
-		return O.delete(t), t;
+			$.call(this, t, n, o);
+		return C.delete(t), t;
 	}
-	function H(t, e, n) {
-		let { setRemoveAttr: o, s: r } = U(t, this), c = this;
+	function $(t, e, n) {
+		let { setRemoveAttr: o, s: r } = q(t, this), c = this;
 		n = r.processReactiveAttribute(
 			t,
 			e,
 			n,
-			(a, p) => H.call(c, t, a, p)
+			(a, p) => $.call(c, t, a, p)
 		);
 		let [s] = e;
 		if (s === "=")
 			return o(e.slice(1), n);
 		if (s === ".")
-			return k(t, e.slice(1), n);
+			return U(t, e.slice(1), n);
 		if (/(aria|data)([A-Z])/.test(e))
 			return e = e.replace(/([a-z])([A-Z])/g, "$1-$2").toLowerCase(), o(e, n);
 		switch (e === "className" && (e = "class"), e) {
 			case "xlink:href":
 				return o(e, n, "http://www.w3.org/1999/xlink");
 			case "textContent":
-				return z(t, e, n);
+				return H(t, e, n);
 			case "style":
 				if (typeof n != "object")
 					break;
 			case "dataset":
-				return j(r, n, k.bind(null, t[e]));
+				return T(r, n, U.bind(null, t[e]));
 			case "ariaset":
-				return j(r, n, (a, p) => o("aria-" + a, p));
+				return T(r, n, (a, p) => o("aria-" + a, p));
 			case "classList":
-				return K.call(c, t, n);
+				return X.call(c, t, n);
 		}
-		return Q(t, e) ? z(t, e, n) : o(e, n);
+		return Y(t, e) ? H(t, e, n) : o(e, n);
 	}
-	function U(t, e) {
-		if (O.has(t))
-			return O.get(t);
-		let o = (t instanceof SVGElement ? G : B).bind(null, t, "Attribute"), r = S(e);
+	function q(t, e) {
+		if (C.has(t))
+			return C.get(t);
+		let o = (t instanceof SVGElement ? J : I).bind(null, t, "Attribute"), r = A(e);
 		return { setRemoveAttr: o, s: r };
 	}
-	function K(t, e) {
-		let n = S(this);
-		return j(
+	function X(t, e) {
+		let n = A(this);
+		return T(
 			n,
 			e,
 			(o, r) => t.classList.toggle(o, r === -1 ? void 0 : !!r)
 		), t;
 	}
-	function pt(t) {
+	function ht(t) {
 		return Array.from(t.children).forEach((e) => e.remove()), t;
 	}
-	function Q(t, e) {
+	function Y(t, e) {
 		if (!Reflect.has(t, e))
 			return !1;
-		let n = $(t, e);
+		let n = B(t, e);
 		return !E(n.set);
 	}
-	function $(t, e) {
+	function B(t, e) {
 		if (t = Object.getPrototypeOf(t), !t)
 			return {};
 		let n = Object.getOwnPropertyDescriptor(t, e);
-		return n || $(t, e);
+		return n || B(t, e);
 	}
-	function j(t, e, n) {
+	function T(t, e, n) {
 		if (!(typeof e != "object" || e === null))
 			return Object.entries(e).forEach(function([r, c]) {
 				r && (c = t.processReactiveAttribute(e, r, c, n), n(r, c));
 			});
 	}
-	function q(t) {
+	function G(t) {
 		return Array.isArray(t) ? t.filter(Boolean).join(" ") : t;
 	}
-	function B(t, e, n, o) {
-		return t[(E(o) ? "remove" : "set") + e](n, q(o));
+	function I(t, e, n, o) {
+		return t[(E(o) ? "remove" : "set") + e](n, G(o));
 	}
-	function G(t, e, n, o, r = null) {
-		return t[(E(o) ? "remove" : "set") + e + "NS"](r, n, q(o));
+	function J(t, e, n, o, r = null) {
+		return t[(E(o) ? "remove" : "set") + e + "NS"](r, n, G(o));
 	}
-	function k(t, e, n) {
+	function U(t, e, n) {
 		if (Reflect.set(t, e, n), !!E(n))
 			return Reflect.deleteProperty(t, e);
 	}
 	
 	// src/events.js
-	function gt(t, e, ...n) {
+	function bt(t, e, ...n) {
 		let o = n.length ? new CustomEvent(e, { detail: n[0] }) : new Event(e);
 		return t.dispatchEvent(o);
 	}
@@ -206,26 +206,26 @@
 			return r.addEventListener(t, e, n), r;
 		};
 	}
-	var C = Y(), X = /* @__PURE__ */ new WeakSet();
+	var L = et(), tt = /* @__PURE__ */ new WeakSet();
 	v.connected = function(t, e) {
 		let n = "connected";
 		return typeof e != "object" && (e = {}), e.once = !0, function(r) {
 			let c = "dde:" + n;
-			return r.addEventListener(c, t, e), r.__dde_lifecycleToEvents ? r : r.isConnected ? (r.dispatchEvent(new Event(c)), r) : (A(e.signal, () => C.offConnected(r, t)) && C.onConnected(r, t), r);
+			return r.addEventListener(c, t, e), r.__dde_lifecycleToEvents ? r : r.isConnected ? (r.dispatchEvent(new Event(c)), r) : (O(e.signal, () => L.offConnected(r, t)) && L.onConnected(r, t), r);
 		};
 	};
 	v.disconnected = function(t, e) {
 		let n = "disconnected";
 		return typeof e != "object" && (e = {}), e.once = !0, function(r) {
 			let c = "dde:" + n;
-			return r.addEventListener(c, t, e), r.__dde_lifecycleToEvents || A(e.signal, () => C.offDisconnected(r, t)) && C.onDisconnected(r, t), r;
+			return r.addEventListener(c, t, e), r.__dde_lifecycleToEvents || O(e.signal, () => L.offDisconnected(r, t)) && L.onDisconnected(r, t), r;
 		};
 	};
 	v.attributeChanged = function(t, e) {
 		let n = "attributeChanged";
 		return typeof e != "object" && (e = {}), function(r) {
 			let c = "dde:" + n;
-			if (r.addEventListener(c, t, e), r.__dde_lifecycleToEvents || X.has(r))
+			if (r.addEventListener(c, t, e), r.__dde_lifecycleToEvents || tt.has(r))
 				return r;
 			let s = new MutationObserver(function(p) {
 				for (let { attributeName: b, target: _ } of p)
@@ -233,10 +233,10 @@
 						new CustomEvent(c, { detail: [b, _.getAttribute(b)] })
 					);
 			});
-			return A(e.signal, () => s.disconnect()) && s.observe(r, { attributes: !0 }), r;
+			return O(e.signal, () => s.disconnect()) && s.observe(r, { attributes: !0 }), r;
 		};
 	};
-	function Y() {
+	function et() {
 		let t = /* @__PURE__ */ new Map(), e = !1, n = new MutationObserver(function(i) {
 			for (let u of i)
 				if (u.type === "childList") {
@@ -307,18 +307,18 @@
 		}
 		function b(i, u) {
 			let f = !1;
-			for (let h of i) {
-				if (u && p(h).then(b), !t.has(h))
+			for (let m of i) {
+				if (u && p(m).then(b), !t.has(m))
 					continue;
-				let w = t.get(h);
-				w.length_c && (h.dispatchEvent(new Event("dde:connected")), w.connected = /* @__PURE__ */ new WeakSet(), w.length_c = 0, w.length_d || t.delete(h), f = !0);
+				let x = t.get(m);
+				x.length_c && (m.dispatchEvent(new Event("dde:connected")), x.connected = /* @__PURE__ */ new WeakSet(), x.length_c = 0, x.length_d || t.delete(m), f = !0);
 			}
 			return f;
 		}
 		function _(i, u) {
 			let f = !1;
-			for (let h of i)
-				u && p(h).then(_), !(!t.has(h) || !t.get(h).length_d) && (h.dispatchEvent(new Event("dde:disconnected")), t.delete(h), f = !0);
+			for (let m of i)
+				u && p(m).then(_), !(!t.has(m) || !t.get(m).length_d) && (m.dispatchEvent(new Event("dde:disconnected")), t.delete(m), f = !0);
 			return f;
 		}
 	}
@@ -333,25 +333,30 @@
 	
 	// src/signals-lib.js
 	var d = Symbol.for("Signal");
-	function L(t) {
+	function N(t) {
 		try {
 			return Reflect.has(t, d);
 		} catch {
 			return !1;
 		}
 	}
-	var D = [], g = /* @__PURE__ */ new WeakMap();
-	function l(t, e) {
+	var P = [], l = /* @__PURE__ */ new WeakMap();
+	function g(t, e) {
 		if (typeof t != "function")
-			return I(t, e);
-		if (L(t))
+			return V(t, e);
+		if (N(t))
 			return t;
-		let n = I(), o = function() {
-			D.push(o), n(t()), D.pop();
+		let n = V(), o = function() {
+			let [r, ...c] = l.get(o);
+			if (l.set(o, /* @__PURE__ */ new Set([r])), P.push(o), n(t()), P.pop(), !c.length)
+				return;
+			let s = l.get(o);
+			for (let a of c)
+				s.has(a) || S(a, o);
 		};
-		return g.set(o, /* @__PURE__ */ new Set([n])), g.set(n[d], o), o(), n;
+		return l.set(n[d], o), l.set(o, /* @__PURE__ */ new Set([n])), o(), n;
 	}
-	l.action = function(t, e, ...n) {
+	g.action = function(t, e, ...n) {
 		let o = t[d], { actions: r } = o;
 		if (!r || !Reflect.has(r, e))
 			throw new Error(`'${t}' has no action with name '${e}'!`);
@@ -359,30 +364,30 @@
 			return Reflect.deleteProperty(o, "skip");
 		o.listeners.forEach((c) => c(o.value));
 	};
-	l.on = function t(e, n, o = {}) {
+	g.on = function t(e, n, o = {}) {
 		let { signal: r } = o;
 		if (!(r && r.aborted)) {
 			if (Array.isArray(e))
 				return e.forEach((c) => t(c, n, o));
-			T(e, n), r && r.addEventListener("abort", () => N(e, n));
+			W(e, n), r && r.addEventListener("abort", () => S(e, n));
 		}
 	};
-	l.symbols = {
+	g.symbols = {
 		signal: d,
 		onclear: Symbol.for("Signal.onclear")
 	};
-	l.attribute = function(t, e = void 0) {
-		let { host: n } = m, o = n() && n().hasAttribute(t) ? n().getAttribute(t) : e, r = new AbortController(), c = l(o, {
-			[l.symbols.onclear]() {
+	g.attribute = function(t, e = void 0) {
+		let { host: n } = h, o = n() && n().hasAttribute(t) ? n().getAttribute(t) : e, r = new AbortController(), c = g(o, {
+			[g.symbols.onclear]() {
 				r.abort();
 			}
 		});
-		return m.host(v.attributeChanged(function({ detail: a }) {
+		return h.host(v.attributeChanged(function({ detail: a }) {
 			let [p, b] = a;
 			p === t && c(b);
 		}, { signal: r.signal })), c;
 	};
-	l.clear = function(...t) {
+	g.clear = function(...t) {
 		for (let n of t) {
 			Reflect.deleteProperty(n, "toJSON");
 			let o = n[d];
@@ -390,129 +395,136 @@
 		}
 		function e(n, o) {
 			o.listeners.forEach((r) => {
-				if (o.listeners.delete(r), !g.has(r))
+				if (o.listeners.delete(r), !l.has(r))
 					return;
-				let c = g.get(r);
-				c.delete(n), !(c.size > 1) && (l.clear(...c), g.delete(r));
+				let c = l.get(r);
+				c.delete(n), !(c.size > 1) && (g.clear(...c), l.delete(r));
 			});
 		}
 	};
-	l.el = function(t, e) {
-		let n = document.createComment("<#reactive>"), o = document.createComment("</#reactive>"), r = document.createDocumentFragment();
+	var D = "__dde_reactive";
+	g.el = function(t, e) {
+		let n = document.createComment("<dde:reactive>"), o = document.createComment("</dde:reactive>"), r = document.createDocumentFragment();
 		r.append(n, o);
-		let c = (s) => {
+		let { current: c } = h, s = (a) => {
 			if (!n.parentNode || !o.parentNode)
-				return N(t, c);
-			let a = e(s);
-			Array.isArray(a) || (a = [a]);
-			let p = n;
-			for (; (p = n.nextSibling) !== o; )
-				p.remove();
-			n.after(...a);
+				return S(t, s);
+			h.push(c);
+			let p = e(a);
+			h.pop(), Array.isArray(p) || (p = [p]);
+			let b = n;
+			for (; (b = n.nextSibling) !== o; )
+				b.remove();
+			n.after(...p);
 		};
-		return T(t, c), V(t, c, n, e), c(t()), r;
+		return W(t, s), K(t, s, n, e), s(t()), r;
 	};
-	var J = {
-		isSignal: L,
+	var Z = {
+		isSignal: N,
 		processReactiveAttribute(t, e, n, o) {
-			if (!L(n))
+			if (!N(n))
 				return n;
 			let r = (c) => o(e, c);
-			return T(n, r), V(n, r, t, e), n();
+			return W(n, r), K(n, r, t, e), n();
 		}
 	};
-	function V(t, e, ...n) {
-		let { current: o } = m;
-		if (o.prevent)
-			return;
-		let r = "__dde_reactive";
-		o.host(function(c) {
-			c[r] || (c[r] = [], v.disconnected(
+	function K(t, e, ...n) {
+		let { current: o } = h;
+		o.prevent || o.host(function(r) {
+			r[D] || (r[D] = [], v.disconnected(
 				() => (
 					/*!
 					* Clears all signals listeners added in the current scope/host (`S.el`, `assign`, …?).
 					* You can investigate the `__dde_reactive` key of the element.
 					* */
-					c[r].forEach(([s]) => N(...s, t[d]?.host() === c))
+					r[D].forEach(([[c, s]]) => S(c, s, c[d]?.host() === r))
 				)
-			)(c)), c[r].push([[t, e], ...n]);
+			)(r)), r[D].push([[t, e], ...n]);
 		});
 	}
-	function I(t, e) {
-		let n = (...o) => o.length ? ot(n, ...o) : rt(n);
-		return et(n, t, e);
+	function V(t, e) {
+		let n = (...o) => o.length ? st(n, ...o) : ct(n);
+		return rt(n, t, e);
 	}
-	var tt = Object.assign(/* @__PURE__ */ Object.create(null), {
+	var nt = Object.assign(/* @__PURE__ */ Object.create(null), {
 		stopPropagation() {
 			this.skip = !0;
 		}
-	});
-	function et(t, e, n) {
+	}), M = class extends Error {
+		constructor() {
+			super();
+			let [e, ...n] = this.stack.split(`
+	`), o = e.slice(e.indexOf("@"), e.indexOf(".js:") + 4);
+			this.stack = n.find((r) => !r.includes(o));
+		}
+	};
+	function rt(t, e, n) {
 		let o = [];
-		M(n) !== "[object Object]" && (n = {});
-		let { onclear: r } = l.symbols;
+		k(n) !== "[object Object]" && (n = {});
+		let { onclear: r } = g.symbols;
 		n[r] && (o.push(n[r]), Reflect.deleteProperty(n, r));
-		let { host: c } = m;
+		let { host: c } = h;
 		return t[d] = {
 			value: e,
 			actions: n,
 			onclear: o,
 			host: c,
-			listeners: /* @__PURE__ */ new Set()
-		}, t.toJSON = () => t(), Object.setPrototypeOf(t[d], tt), t;
+			listeners: /* @__PURE__ */ new Set(),
+			defined: new M()
+		}, t.toJSON = () => t(), Object.setPrototypeOf(t[d], nt), t;
 	}
-	function nt() {
-		return D[D.length - 1];
+	function ot() {
+		return P[P.length - 1];
 	}
-	function rt(t) {
+	function ct(t) {
 		if (!t[d])
 			return;
-		let { value: e, listeners: n } = t[d], o = nt();
-		return o && n.add(o), g.has(o) && g.get(o).add(t), e;
+		let { value: e, listeners: n } = t[d], o = ot();
+		return o && n.add(o), l.has(o) && l.get(o).add(t), e;
 	}
-	function ot(t, e, n) {
+	function st(t, e, n) {
 		if (!t[d])
 			return;
 		let o = t[d];
 		if (!(!n && o.value === e))
 			return o.value = e, o.listeners.forEach((r) => r(e)), e;
 	}
-	function T(t, e) {
+	function W(t, e) {
 		if (t[d])
 			return t[d].listeners.add(e);
 	}
-	function N(t, e, n) {
+	function S(t, e, n) {
 		let o = t[d];
 		if (!o)
 			return;
 		let r = o.listeners.delete(e);
 		if (n && !o.listeners.size) {
-			if (l.clear(t), !g.has(o))
+			if (g.clear(t), !l.has(o))
 				return r;
-			let c = g.get(o);
-			if (!g.has(c))
+			let c = l.get(o);
+			if (!l.has(c))
 				return r;
-			g.get(c).forEach((s) => N(s, c, !0));
+			l.get(c).forEach((s) => S(s, c, !0));
 		}
 		return r;
 	}
 	
 	// signals.js
-	P(J);
+	j(Z);
 	
 	globalThis.dde= {
-		S: l,
+		S: g,
 		assign: R,
-		assignAttribute: H,
-		classListDeclarative: K,
-		createElement: at,
-		dispatchEvent: gt,
-		el: at,
-		empty: pt,
-		isSignal: L,
+		assignAttribute: $,
+		classListDeclarative: X,
+		createElement: pt,
+		dispatchEvent: bt,
+		el: pt,
+		empty: ht,
+		isSignal: N,
 		on: v,
-		registerReactivity: P,
-		scope: m
+		registerReactivity: j,
+		scope: h
 	};
 	
 })();
\ No newline at end of file
diff --git a/dist/esm-with-signals.js b/dist/esm-with-signals.js
index d10e671..40ca3af 100644
--- a/dist/esm-with-signals.js
+++ b/dist/esm-with-signals.js
@@ -1,5 +1,5 @@
 // src/signals-common.js
-var x = {
+var w = {
 	isSignal(t) {
 		return !1;
 	},
@@ -7,22 +7,22 @@ var x = {
 		return n;
 	}
 };
-function P(t, e = !0) {
-	return e ? Object.assign(x, t) : (Object.setPrototypeOf(t, x), t);
+function j(t, e = !0) {
+	return e ? Object.assign(w, t) : (Object.setPrototypeOf(t, w), t);
 }
-function S(t) {
-	return x.isPrototypeOf(t) && t !== x ? t : x;
+function A(t) {
+	return w.isPrototypeOf(t) && t !== w ? t : w;
 }
 
 // src/helpers.js
 function E(t) {
 	return typeof t > "u";
 }
-function M(t) {
+function k(t) {
 	let e = typeof t;
 	return e !== "object" ? e : t === null ? "null" : Object.prototype.toString.call(t);
 }
-function A(t, e) {
+function O(t, e) {
 	if (!t || !(t instanceof AbortSignal))
 		return !0;
 	if (!t.aborted)
@@ -32,8 +32,8 @@ function A(t, e) {
 }
 
 // src/dom-common.js
-var W = { setDeleteAttr: Z };
-function Z(t, e, n) {
+var F = { setDeleteAttr: Q };
+function Q(t, e, n) {
 	if (Reflect.set(t, e, n), !!E(n)) {
 		if (Reflect.deleteProperty(t, e), t instanceof HTMLElement && t.getAttribute(e) === "undefined")
 			return t.removeAttribute(e);
@@ -48,7 +48,7 @@ var y = [{
 	namespace: "html",
 	host: (t) => t ? t(document.body) : document.body,
 	prevent: !0
-}], F = (t) => t === "svg" ? "http://www.w3.org/2000/svg" : t, m = {
+}], z = (t) => t === "svg" ? "http://www.w3.org/2000/svg" : t, h = {
 	get current() {
 		return y[y.length - 1];
 	},
@@ -59,7 +59,7 @@ var y = [{
 		return this.current.namespace;
 	},
 	set namespace(t) {
-		return this.current.namespace = F(t);
+		return this.current.namespace = z(t);
 	},
 	preventDefault() {
 		let { current: t } = this;
@@ -69,7 +69,7 @@ var y = [{
 		let e = this.namespace;
 		return this.namespace = t, {
 			append(...n) {
-				return m.namespace = e, n.length === 1 ? n[0] : document.createDocumentFragment().append(...n);
+				return h.namespace = e, n.length === 1 ? n[0] : document.createDocumentFragment().append(...n);
 			}
 		};
 	},
@@ -77,17 +77,17 @@ var y = [{
 		return [...y];
 	},
 	push(t = {}) {
-		return t.namespace && (t.namespace = F(t.namespace)), y.push(Object.assign({}, this.current, { prevent: !1 }, t));
+		return t.namespace && (t.namespace = z(t.namespace)), y.push(Object.assign({}, this.current, { prevent: !1 }, t));
 	},
 	pop() {
 		return y.pop();
 	}
 };
-function at(t, e, ...n) {
-	let o = S(this), { namespace: r } = m, c = 0, s;
+function pt(t, e, ...n) {
+	let o = A(this), { namespace: r } = h, c = 0, s;
 	switch ((Object(e) !== e || o.isSignal(e)) && (e = { textContent: e }), !0) {
 		case typeof t == "function": {
-			c = 1, m.push({ scope: t, host: (a) => a ? (c === 1 ? n.unshift(a) : a(s), void 0) : s }), s = t(e || void 0), (s instanceof HTMLElement ? B : G)(s, "Attribute", "dde-fun", t.name);
+			c = 1, h.push({ scope: t, host: (a) => a ? (c === 1 ? n.unshift(a) : a(s), void 0) : s }), s = t(e || void 0), (s instanceof HTMLElement ? I : J)(s, "Attribute", "dde-fun", t.name);
 			break;
 		}
 		case t === "#text":
@@ -102,100 +102,100 @@ function at(t, e, ...n) {
 		case !s:
 			s = R.call(this, document.createElement(t), e);
 	}
-	return n.forEach((a) => a(s)), c && m.pop(), c = 2, s;
+	return n.forEach((a) => a(s)), c && h.pop(), c = 2, s;
 }
-var { setDeleteAttr: z } = W, O = /* @__PURE__ */ new WeakMap();
+var { setDeleteAttr: H } = F, C = /* @__PURE__ */ new WeakMap();
 function R(t, ...e) {
 	if (!e.length)
 		return t;
-	O.set(t, U(t, this));
+	C.set(t, q(t, this));
 	for (let [n, o] of Object.entries(Object.assign({}, ...e)))
-		H.call(this, t, n, o);
-	return O.delete(t), t;
+		$.call(this, t, n, o);
+	return C.delete(t), t;
 }
-function H(t, e, n) {
-	let { setRemoveAttr: o, s: r } = U(t, this), c = this;
+function $(t, e, n) {
+	let { setRemoveAttr: o, s: r } = q(t, this), c = this;
 	n = r.processReactiveAttribute(
 		t,
 		e,
 		n,
-		(a, p) => H.call(c, t, a, p)
+		(a, p) => $.call(c, t, a, p)
 	);
 	let [s] = e;
 	if (s === "=")
 		return o(e.slice(1), n);
 	if (s === ".")
-		return k(t, e.slice(1), n);
+		return U(t, e.slice(1), n);
 	if (/(aria|data)([A-Z])/.test(e))
 		return e = e.replace(/([a-z])([A-Z])/g, "$1-$2").toLowerCase(), o(e, n);
 	switch (e === "className" && (e = "class"), e) {
 		case "xlink:href":
 			return o(e, n, "http://www.w3.org/1999/xlink");
 		case "textContent":
-			return z(t, e, n);
+			return H(t, e, n);
 		case "style":
 			if (typeof n != "object")
 				break;
 		case "dataset":
-			return j(r, n, k.bind(null, t[e]));
+			return T(r, n, U.bind(null, t[e]));
 		case "ariaset":
-			return j(r, n, (a, p) => o("aria-" + a, p));
+			return T(r, n, (a, p) => o("aria-" + a, p));
 		case "classList":
-			return K.call(c, t, n);
+			return X.call(c, t, n);
 	}
-	return Q(t, e) ? z(t, e, n) : o(e, n);
+	return Y(t, e) ? H(t, e, n) : o(e, n);
 }
-function U(t, e) {
-	if (O.has(t))
-		return O.get(t);
-	let o = (t instanceof SVGElement ? G : B).bind(null, t, "Attribute"), r = S(e);
+function q(t, e) {
+	if (C.has(t))
+		return C.get(t);
+	let o = (t instanceof SVGElement ? J : I).bind(null, t, "Attribute"), r = A(e);
 	return { setRemoveAttr: o, s: r };
 }
-function K(t, e) {
-	let n = S(this);
-	return j(
+function X(t, e) {
+	let n = A(this);
+	return T(
 		n,
 		e,
 		(o, r) => t.classList.toggle(o, r === -1 ? void 0 : !!r)
 	), t;
 }
-function pt(t) {
+function ht(t) {
 	return Array.from(t.children).forEach((e) => e.remove()), t;
 }
-function Q(t, e) {
+function Y(t, e) {
 	if (!Reflect.has(t, e))
 		return !1;
-	let n = $(t, e);
+	let n = B(t, e);
 	return !E(n.set);
 }
-function $(t, e) {
+function B(t, e) {
 	if (t = Object.getPrototypeOf(t), !t)
 		return {};
 	let n = Object.getOwnPropertyDescriptor(t, e);
-	return n || $(t, e);
+	return n || B(t, e);
 }
-function j(t, e, n) {
+function T(t, e, n) {
 	if (!(typeof e != "object" || e === null))
 		return Object.entries(e).forEach(function([r, c]) {
 			r && (c = t.processReactiveAttribute(e, r, c, n), n(r, c));
 		});
 }
-function q(t) {
+function G(t) {
 	return Array.isArray(t) ? t.filter(Boolean).join(" ") : t;
 }
-function B(t, e, n, o) {
-	return t[(E(o) ? "remove" : "set") + e](n, q(o));
+function I(t, e, n, o) {
+	return t[(E(o) ? "remove" : "set") + e](n, G(o));
 }
-function G(t, e, n, o, r = null) {
-	return t[(E(o) ? "remove" : "set") + e + "NS"](r, n, q(o));
+function J(t, e, n, o, r = null) {
+	return t[(E(o) ? "remove" : "set") + e + "NS"](r, n, G(o));
 }
-function k(t, e, n) {
+function U(t, e, n) {
 	if (Reflect.set(t, e, n), !!E(n))
 		return Reflect.deleteProperty(t, e);
 }
 
 // src/events.js
-function gt(t, e, ...n) {
+function bt(t, e, ...n) {
 	let o = n.length ? new CustomEvent(e, { detail: n[0] }) : new Event(e);
 	return t.dispatchEvent(o);
 }
@@ -204,26 +204,26 @@ function v(t, e, n) {
 		return r.addEventListener(t, e, n), r;
 	};
 }
-var C = Y(), X = /* @__PURE__ */ new WeakSet();
+var L = et(), tt = /* @__PURE__ */ new WeakSet();
 v.connected = function(t, e) {
 	let n = "connected";
 	return typeof e != "object" && (e = {}), e.once = !0, function(r) {
 		let c = "dde:" + n;
-		return r.addEventListener(c, t, e), r.__dde_lifecycleToEvents ? r : r.isConnected ? (r.dispatchEvent(new Event(c)), r) : (A(e.signal, () => C.offConnected(r, t)) && C.onConnected(r, t), r);
+		return r.addEventListener(c, t, e), r.__dde_lifecycleToEvents ? r : r.isConnected ? (r.dispatchEvent(new Event(c)), r) : (O(e.signal, () => L.offConnected(r, t)) && L.onConnected(r, t), r);
 	};
 };
 v.disconnected = function(t, e) {
 	let n = "disconnected";
 	return typeof e != "object" && (e = {}), e.once = !0, function(r) {
 		let c = "dde:" + n;
-		return r.addEventListener(c, t, e), r.__dde_lifecycleToEvents || A(e.signal, () => C.offDisconnected(r, t)) && C.onDisconnected(r, t), r;
+		return r.addEventListener(c, t, e), r.__dde_lifecycleToEvents || O(e.signal, () => L.offDisconnected(r, t)) && L.onDisconnected(r, t), r;
 	};
 };
 v.attributeChanged = function(t, e) {
 	let n = "attributeChanged";
 	return typeof e != "object" && (e = {}), function(r) {
 		let c = "dde:" + n;
-		if (r.addEventListener(c, t, e), r.__dde_lifecycleToEvents || X.has(r))
+		if (r.addEventListener(c, t, e), r.__dde_lifecycleToEvents || tt.has(r))
 			return r;
 		let s = new MutationObserver(function(p) {
 			for (let { attributeName: b, target: _ } of p)
@@ -231,10 +231,10 @@ v.attributeChanged = function(t, e) {
 					new CustomEvent(c, { detail: [b, _.getAttribute(b)] })
 				);
 		});
-		return A(e.signal, () => s.disconnect()) && s.observe(r, { attributes: !0 }), r;
+		return O(e.signal, () => s.disconnect()) && s.observe(r, { attributes: !0 }), r;
 	};
 };
-function Y() {
+function et() {
 	let t = /* @__PURE__ */ new Map(), e = !1, n = new MutationObserver(function(i) {
 		for (let u of i)
 			if (u.type === "childList") {
@@ -305,18 +305,18 @@ function Y() {
 	}
 	function b(i, u) {
 		let f = !1;
-		for (let h of i) {
-			if (u && p(h).then(b), !t.has(h))
+		for (let m of i) {
+			if (u && p(m).then(b), !t.has(m))
 				continue;
-			let w = t.get(h);
-			w.length_c && (h.dispatchEvent(new Event("dde:connected")), w.connected = /* @__PURE__ */ new WeakSet(), w.length_c = 0, w.length_d || t.delete(h), f = !0);
+			let x = t.get(m);
+			x.length_c && (m.dispatchEvent(new Event("dde:connected")), x.connected = /* @__PURE__ */ new WeakSet(), x.length_c = 0, x.length_d || t.delete(m), f = !0);
 		}
 		return f;
 	}
 	function _(i, u) {
 		let f = !1;
-		for (let h of i)
-			u && p(h).then(_), !(!t.has(h) || !t.get(h).length_d) && (h.dispatchEvent(new Event("dde:disconnected")), t.delete(h), f = !0);
+		for (let m of i)
+			u && p(m).then(_), !(!t.has(m) || !t.get(m).length_d) && (m.dispatchEvent(new Event("dde:disconnected")), t.delete(m), f = !0);
 		return f;
 	}
 }
@@ -331,25 +331,30 @@ function Y() {
 
 // src/signals-lib.js
 var d = Symbol.for("Signal");
-function L(t) {
+function N(t) {
 	try {
 		return Reflect.has(t, d);
 	} catch {
 		return !1;
 	}
 }
-var D = [], g = /* @__PURE__ */ new WeakMap();
-function l(t, e) {
+var P = [], l = /* @__PURE__ */ new WeakMap();
+function g(t, e) {
 	if (typeof t != "function")
-		return I(t, e);
-	if (L(t))
+		return V(t, e);
+	if (N(t))
 		return t;
-	let n = I(), o = function() {
-		D.push(o), n(t()), D.pop();
+	let n = V(), o = function() {
+		let [r, ...c] = l.get(o);
+		if (l.set(o, /* @__PURE__ */ new Set([r])), P.push(o), n(t()), P.pop(), !c.length)
+			return;
+		let s = l.get(o);
+		for (let a of c)
+			s.has(a) || S(a, o);
 	};
-	return g.set(o, /* @__PURE__ */ new Set([n])), g.set(n[d], o), o(), n;
+	return l.set(n[d], o), l.set(o, /* @__PURE__ */ new Set([n])), o(), n;
 }
-l.action = function(t, e, ...n) {
+g.action = function(t, e, ...n) {
 	let o = t[d], { actions: r } = o;
 	if (!r || !Reflect.has(r, e))
 		throw new Error(`'${t}' has no action with name '${e}'!`);
@@ -357,30 +362,30 @@ l.action = function(t, e, ...n) {
 		return Reflect.deleteProperty(o, "skip");
 	o.listeners.forEach((c) => c(o.value));
 };
-l.on = function t(e, n, o = {}) {
+g.on = function t(e, n, o = {}) {
 	let { signal: r } = o;
 	if (!(r && r.aborted)) {
 		if (Array.isArray(e))
 			return e.forEach((c) => t(c, n, o));
-		T(e, n), r && r.addEventListener("abort", () => N(e, n));
+		W(e, n), r && r.addEventListener("abort", () => S(e, n));
 	}
 };
-l.symbols = {
+g.symbols = {
 	signal: d,
 	onclear: Symbol.for("Signal.onclear")
 };
-l.attribute = function(t, e = void 0) {
-	let { host: n } = m, o = n() && n().hasAttribute(t) ? n().getAttribute(t) : e, r = new AbortController(), c = l(o, {
-		[l.symbols.onclear]() {
+g.attribute = function(t, e = void 0) {
+	let { host: n } = h, o = n() && n().hasAttribute(t) ? n().getAttribute(t) : e, r = new AbortController(), c = g(o, {
+		[g.symbols.onclear]() {
 			r.abort();
 		}
 	});
-	return m.host(v.attributeChanged(function({ detail: a }) {
+	return h.host(v.attributeChanged(function({ detail: a }) {
 		let [p, b] = a;
 		p === t && c(b);
 	}, { signal: r.signal })), c;
 };
-l.clear = function(...t) {
+g.clear = function(...t) {
 	for (let n of t) {
 		Reflect.deleteProperty(n, "toJSON");
 		let o = n[d];
@@ -388,126 +393,133 @@ l.clear = function(...t) {
 	}
 	function e(n, o) {
 		o.listeners.forEach((r) => {
-			if (o.listeners.delete(r), !g.has(r))
+			if (o.listeners.delete(r), !l.has(r))
 				return;
-			let c = g.get(r);
-			c.delete(n), !(c.size > 1) && (l.clear(...c), g.delete(r));
+			let c = l.get(r);
+			c.delete(n), !(c.size > 1) && (g.clear(...c), l.delete(r));
 		});
 	}
 };
-l.el = function(t, e) {
-	let n = document.createComment("<#reactive>"), o = document.createComment("</#reactive>"), r = document.createDocumentFragment();
+var D = "__dde_reactive";
+g.el = function(t, e) {
+	let n = document.createComment("<dde:reactive>"), o = document.createComment("</dde:reactive>"), r = document.createDocumentFragment();
 	r.append(n, o);
-	let c = (s) => {
+	let { current: c } = h, s = (a) => {
 		if (!n.parentNode || !o.parentNode)
-			return N(t, c);
-		let a = e(s);
-		Array.isArray(a) || (a = [a]);
-		let p = n;
-		for (; (p = n.nextSibling) !== o; )
-			p.remove();
-		n.after(...a);
+			return S(t, s);
+		h.push(c);
+		let p = e(a);
+		h.pop(), Array.isArray(p) || (p = [p]);
+		let b = n;
+		for (; (b = n.nextSibling) !== o; )
+			b.remove();
+		n.after(...p);
 	};
-	return T(t, c), V(t, c, n, e), c(t()), r;
+	return W(t, s), K(t, s, n, e), s(t()), r;
 };
-var J = {
-	isSignal: L,
+var Z = {
+	isSignal: N,
 	processReactiveAttribute(t, e, n, o) {
-		if (!L(n))
+		if (!N(n))
 			return n;
 		let r = (c) => o(e, c);
-		return T(n, r), V(n, r, t, e), n();
+		return W(n, r), K(n, r, t, e), n();
 	}
 };
-function V(t, e, ...n) {
-	let { current: o } = m;
-	if (o.prevent)
-		return;
-	let r = "__dde_reactive";
-	o.host(function(c) {
-		c[r] || (c[r] = [], v.disconnected(
+function K(t, e, ...n) {
+	let { current: o } = h;
+	o.prevent || o.host(function(r) {
+		r[D] || (r[D] = [], v.disconnected(
 			() => (
 				/*!
 				* Clears all signals listeners added in the current scope/host (`S.el`, `assign`, …?).
 				* You can investigate the `__dde_reactive` key of the element.
 				* */
-				c[r].forEach(([s]) => N(...s, t[d]?.host() === c))
+				r[D].forEach(([[c, s]]) => S(c, s, c[d]?.host() === r))
 			)
-		)(c)), c[r].push([[t, e], ...n]);
+		)(r)), r[D].push([[t, e], ...n]);
 	});
 }
-function I(t, e) {
-	let n = (...o) => o.length ? ot(n, ...o) : rt(n);
-	return et(n, t, e);
+function V(t, e) {
+	let n = (...o) => o.length ? st(n, ...o) : ct(n);
+	return rt(n, t, e);
 }
-var tt = Object.assign(/* @__PURE__ */ Object.create(null), {
+var nt = Object.assign(/* @__PURE__ */ Object.create(null), {
 	stopPropagation() {
 		this.skip = !0;
 	}
-});
-function et(t, e, n) {
+}), M = class extends Error {
+	constructor() {
+		super();
+		let [e, ...n] = this.stack.split(`
+`), o = e.slice(e.indexOf("@"), e.indexOf(".js:") + 4);
+		this.stack = n.find((r) => !r.includes(o));
+	}
+};
+function rt(t, e, n) {
 	let o = [];
-	M(n) !== "[object Object]" && (n = {});
-	let { onclear: r } = l.symbols;
+	k(n) !== "[object Object]" && (n = {});
+	let { onclear: r } = g.symbols;
 	n[r] && (o.push(n[r]), Reflect.deleteProperty(n, r));
-	let { host: c } = m;
+	let { host: c } = h;
 	return t[d] = {
 		value: e,
 		actions: n,
 		onclear: o,
 		host: c,
-		listeners: /* @__PURE__ */ new Set()
-	}, t.toJSON = () => t(), Object.setPrototypeOf(t[d], tt), t;
+		listeners: /* @__PURE__ */ new Set(),
+		defined: new M()
+	}, t.toJSON = () => t(), Object.setPrototypeOf(t[d], nt), t;
 }
-function nt() {
-	return D[D.length - 1];
+function ot() {
+	return P[P.length - 1];
 }
-function rt(t) {
+function ct(t) {
 	if (!t[d])
 		return;
-	let { value: e, listeners: n } = t[d], o = nt();
-	return o && n.add(o), g.has(o) && g.get(o).add(t), e;
+	let { value: e, listeners: n } = t[d], o = ot();
+	return o && n.add(o), l.has(o) && l.get(o).add(t), e;
 }
-function ot(t, e, n) {
+function st(t, e, n) {
 	if (!t[d])
 		return;
 	let o = t[d];
 	if (!(!n && o.value === e))
 		return o.value = e, o.listeners.forEach((r) => r(e)), e;
 }
-function T(t, e) {
+function W(t, e) {
 	if (t[d])
 		return t[d].listeners.add(e);
 }
-function N(t, e, n) {
+function S(t, e, n) {
 	let o = t[d];
 	if (!o)
 		return;
 	let r = o.listeners.delete(e);
 	if (n && !o.listeners.size) {
-		if (l.clear(t), !g.has(o))
+		if (g.clear(t), !l.has(o))
 			return r;
-		let c = g.get(o);
-		if (!g.has(c))
+		let c = l.get(o);
+		if (!l.has(c))
 			return r;
-		g.get(c).forEach((s) => N(s, c, !0));
+		l.get(c).forEach((s) => S(s, c, !0));
 	}
 	return r;
 }
 
 // signals.js
-P(J);
+j(Z);
 export {
-	l as S,
+	g as S,
 	R as assign,
-	H as assignAttribute,
-	K as classListDeclarative,
-	at as createElement,
-	gt as dispatchEvent,
-	at as el,
-	pt as empty,
-	L as isSignal,
+	$ as assignAttribute,
+	X as classListDeclarative,
+	pt as createElement,
+	bt as dispatchEvent,
+	pt as el,
+	ht as empty,
+	N as isSignal,
 	v as on,
-	P as registerReactivity,
-	m as scope
+	j as registerReactivity,
+	h as scope
 };
diff --git a/src/signals-lib.js b/src/signals-lib.js
index f4c55dc..25545fb 100644
--- a/src/signals-lib.js
+++ b/src/signals-lib.js
@@ -6,7 +6,13 @@ export function isSignal(candidate){
 }
 /** @type {function[]} */
 const stack_watch= [];
-/** @type {WeakMap<function|ddeSignal<any, any>,Set<ddeSignal<any, any>>|function>} */
+/**
+ * ### `WeakMap<function, Set<ddeSignal<any, any>>>`
+ * The `Set` is in the form of `[ source, ...depended signals (DSs) ]`. When the DS is cleaned it is removed from DSs, if remains only one (`source`) it is cleared too.
+ * ### `WeakMap<object, function>`
+ * This is used for revesed deps, the `function` is also key for `deps`.
+ * @type {WeakMap<function|object,Set<ddeSignal<any, any>>|function>}
+ * */
 const deps= new WeakMap();
 export function S(value, actions){
 	if(typeof value!=="function")
@@ -15,12 +21,22 @@ export function S(value, actions){
 	
 	const out= create();
 	const contextReWatch= function(){
+		const [ origin, ...deps_old ]= deps.get(contextReWatch);
+		deps.set(contextReWatch, new Set([ origin ]));
+
 		stack_watch.push(contextReWatch);
 		out(value());
 		stack_watch.pop();
+
+		if(!deps_old.length) return;
+		const deps_curr= deps.get(contextReWatch);
+		for (const dep_signal of deps_old){
+			if(deps_curr.has(dep_signal)) continue;
+			removeSignalListener(dep_signal, contextReWatch);
+		}
 	};
-	deps.set(contextReWatch, new Set([ out ]));
 	deps.set(out[mark], contextReWatch);
+	deps.set(contextReWatch, new Set([ out ]));
 	contextReWatch();
 	return out;
 }
@@ -82,15 +98,19 @@ S.clear= function(...signals){
 		});
 	}
 };
+const key_reactive= "__dde_reactive";
 S.el= function(signal, map){
-	const mark_start= document.createComment("<#reactive>");
-	const mark_end= document.createComment("</#reactive>");
+	const mark_start= document.createComment(`<dde:reactive>`);
+	const mark_end= document.createComment("</dde:reactive>");
 	const out= document.createDocumentFragment();
 	out.append(mark_start, mark_end);
+	const { current }= scope;
 	const reRenderReactiveElement= v=> {
 		if(!mark_start.parentNode || !mark_end.parentNode)
 			return removeSignalListener(signal, reRenderReactiveElement);
+		scope.push(current);
 		let els= map(v);
+		scope.pop();
 		if(!Array.isArray(els))
 			els= [ els ];
 		let el_r= mark_start;
@@ -107,30 +127,30 @@ S.el= function(signal, map){
 import { typeOf } from './helpers.js';
 export const signals_config= {
 	isSignal,
-	processReactiveAttribute(_, key, attrs, set){
+	processReactiveAttribute(element, key, attrs, set){
 		if(!isSignal(attrs)) return attrs;
 		const l= attr=> set(key, attr);
 		addSignalListener(attrs, l);
-		removeSignalsFromElements(attrs, l, _, key);
+		removeSignalsFromElements(attrs, l, element, key);
 		return attrs();
 	}
 };
 function removeSignalsFromElements(signal, listener, ...notes){
 	const { current }= scope;
 	if(current.prevent) return;
-	const k= "__dde_reactive";
 	current.host(function(element){
-		if(!element[k]){
-			element[k]= [];
+		if(!element[key_reactive]){
+			element[key_reactive]= [];
 			on.disconnected(()=>
 				/*!
 				 * Clears all signals listeners added in the current scope/host (`S.el`, `assign`, …?).
-				* You can investigate the `__dde_reactive` key of the element.
-				* */
-				element[k].forEach(([ sl ])=> removeSignalListener(...sl, signal[mark]?.host() === element))
+				 * You can investigate the `__dde_reactive` key of the element.
+				 * */
+				element[key_reactive].forEach(([ [ signal, listener ] ])=>
+					removeSignalListener(signal, listener, signal[mark]?.host() === element))
 			)(element);
 		}
-		element[k].push([ [ signal, listener ], ...notes ]);
+		element[key_reactive].push([ [ signal, listener ], ...notes ]);
 	});
 }
 
@@ -144,6 +164,14 @@ const protoSigal= Object.assign(Object.create(null), {
 		this.skip= true;
 	}
 });
+class SignalDefined extends Error{
+	constructor(){
+		super();
+		const [ curr, ...rest ]= this.stack.split("\n");
+		const curr_file= curr.slice(curr.indexOf("@"), curr.indexOf(".js:")+4);
+		this.stack= rest.find(l=> !l.includes(curr_file));
+	}
+}
 function toSignal(signal, value, actions){
 	const onclear= [];
 	if(typeOf(actions)!=="[object Object]")
@@ -156,7 +184,8 @@ function toSignal(signal, value, actions){
 	const { host }= scope;
 	signal[mark]= {
 		value, actions, onclear, host,
-		listeners: new Set()
+		listeners: new Set(),
+		defined: new SignalDefined()
 	};
 	signal.toJSON= ()=> signal();
 	Object.setPrototypeOf(signal[mark], protoSigal);