Memo/reuse in O.el (#18)

* 🎉

* ✨ Add hasOwn helper and replace `Reflect.*`

* Update package.json

dist/dde-with-observables.js

@@ -1,31 +1,31 @@
 //deka-dom-el library is available via global namespace `dde`
 (()=> {
-var L={isObservable(t){return!1},processReactiveAttribute(t,e,n,r){return n}};function H(t,e=!0){return e?Object.assign(L,t):(Object.setPrototypeOf(t,L),t)}function M(t){return L.isPrototypeOf(t)&&t!==L?t:L}function w(t){return typeof t>"u"}function K(t){let e=typeof t;return e!=="object"?e:t===null?"null":Object.prototype.toString.call(t)}function W(t,e){if(!t||!(t instanceof AbortSignal))return!0;if(!t.aborted)return t.addEventListener("abort",e),function(){t.removeEventListener("abort",e)}}function q(t,e){let{observedAttributes:n=[]}=t.constructor;return n.reduce(function(r,o){return Reflect.set(r,dt(o),e(t,o)),r},{})}function dt(t){return t.replace(/-./g,e=>e[1].toUpperCase())}var d={setDeleteAttr:pt,ssr:"",D:globalThis.document,F:globalThis.DocumentFragment,H:globalThis.HTMLElement,S:globalThis.SVGElement,M:globalThis.MutationObserver};function pt(t,e,n){if(Reflect.set(t,e,n),!!w(n)){if(Reflect.deleteProperty(t,e),t instanceof d.H&&t.getAttribute(e)==="undefined")return t.removeAttribute(e);if(Reflect.get(t,e)==="undefined")return Reflect.set(t,e,"")}}var A="__dde_lifecycleToEvents",y="dde:connected",_="dde:disconnected",N="dde:attributeChanged";var O=[{get scope(){return d.D.body},host:t=>t?t(d.D.body):d.D.body,prevent:!0}],E={get current(){return O[O.length-1]},get host(){return this.current.host},preventDefault(){let{current:t}=this;return t.prevent=!0,t},get state(){return[...O]},push(t={}){return O.push(Object.assign({},this.current,{prevent:!1},t))},pushRoot(){return O.push(O[0])},pop(){if(O.length!==1)return O.pop()}};function Q(...t){return this.appendOriginal(...t),this}function lt(t){return t.append===Q||(t.appendOriginal=t.append,t.append=Q),t}var F;function T(t,e,...n){let r=M(this),o=0,c,s;switch((Object(e)!==e||r.isObservable(e))&&(e={textContent:e}),!0){case typeof t=="function":{o=1,E.push({scope:t,host:(...b)=>b.length?(o===1?n.unshift(...b):b.forEach(g=>g(s)),void 0):s}),c=t(e||void 0);let f=c instanceof d.F;if(c.nodeName==="#comment")break;let p=T.mark({type:"component",name:t.name,host:f?"this":"parentElement"});c.prepend(p),f&&(s=p);break}case t==="#text":c=P.call(this,d.D.createTextNode(""),e);break;case(t==="<>"||!t):c=P.call(this,d.D.createDocumentFragment(),e);break;case!!F:c=P.call(this,d.D.createElementNS(F,t),e);break;case!c:c=P.call(this,d.D.createElement(t),e)}return lt(c),s||(s=c),n.forEach(f=>f(s)),o&&E.pop(),o=2,c}function jt(t,e=t,n=void 0){let r=Symbol.for("default"),o=Array.from(e.querySelectorAll("slot")).reduce((s,f)=>Reflect.set(s,f.name||r,f)&&s,{}),c=Reflect.has(o,r);if(t.append=new Proxy(t.append,{apply(s,f,p){if(!p.length)return t;let b=d.D.createDocumentFragment();for(let g of p){if(!g||!g.slot){c&&b.appendChild(g);continue}let D=g.slot,j=o[D];vt(g,"remove","slot"),j&&(ht(j,g,n),Reflect.deleteProperty(o,D))}return c&&(o[r].replaceWith(b),Reflect.deleteProperty(o,r)),t.append=s,t}}),t!==e){let s=Array.from(t.childNodes);s.forEach(f=>f.remove()),t.append(...s)}return e}function ht(t,e,n){n&&n(t,e);try{t.replaceWith(P(e,{className:[e.className,t.className],dataset:{...t.dataset}}))}catch{t.replaceWith(e)}}T.mark=function(t,e=!1){t=Object.entries(t).map(([o,c])=>o+`="${c}"`).join(" ");let n=e?"":"/",r=d.D.createComment(`<dde:mark ${t}${d.ssr}${n}>`);return e&&(r.end=d.D.createComment("</dde:mark>")),r};function Mt(t){let e=this;return function(...r){F=t;let o=T.call(e,...r);return F=void 0,o}}var $=new WeakMap,{setDeleteAttr:X}=d;function P(t,...e){if(!e.length)return t;$.set(t,et(t,this));for(let[n,r]of Object.entries(Object.assign({},...e)))tt.call(this,t,n,r);return $.delete(t),t}function tt(t,e,n){let{setRemoveAttr:r,s:o}=et(t,this),c=this;n=o.processReactiveAttribute(t,e,n,(f,p)=>tt.call(c,t,f,p));let[s]=e;if(s==="=")return r(e.slice(1),n);if(s===".")return Y(t,e.slice(1),n);if(/(aria|data)([A-Z])/.test(e))return e=e.replace(/([a-z])([A-Z])/g,"$1-$2").toLowerCase(),r(e,n);switch(e==="className"&&(e="class"),e){case"xlink:href":return r(e,n,"http://www.w3.org/1999/xlink");case"textContent":return X(t,e,n);case"style":if(typeof n!="object")break;case"dataset":return B(o,n,Y.bind(null,t[e]));case"ariaset":return B(o,n,(f,p)=>r("aria-"+f,p));case"classList":return bt.call(c,t,n)}return gt(t,e)?X(t,e,n):r(e,n)}function et(t,e){if($.has(t))return $.get(t);let r=(t instanceof d.S?xt:Et).bind(null,t,"Attribute"),o=M(e);return{setRemoveAttr:r,s:o}}function bt(t,e){let n=M(this);return B(n,e,(r,o)=>t.classList.toggle(r,o===-1?void 0:!!o)),t}function Wt(t){return Array.from(t.children).forEach(e=>e.remove()),t}function vt(t,e,n,r){return t instanceof d.H?t[e+"Attribute"](n,r):t[e+"AttributeNS"](null,n,r)}function gt(t,e){if(!Reflect.has(t,e))return!1;let n=nt(t,e);return!w(n.set)}function nt(t,e){if(t=Object.getPrototypeOf(t),!t)return{};let n=Object.getOwnPropertyDescriptor(t,e);return n||nt(t,e)}function B(t,e,n){if(!(typeof e!="object"||e===null))return Object.entries(e).forEach(function([o,c]){o&&(c=t.processReactiveAttribute(e,o,c,n),n(o,c))})}function rt(t){retuLine truncated
+var N={isObservable(t){return!1},processReactiveAttribute(t,e,n,r){return n}};function B(t,e=!0){return e?Object.assign(N,t):(Object.setPrototypeOf(t,N),t)}function W(t){return N.isPrototypeOf(t)&&t!==N?t:N}var T=(...t)=>Object.prototype.hasOwnProperty.call(...t);function A(t){return typeof t>"u"}function Q(t){let e=typeof t;return e!=="object"?e:t===null?"null":Object.prototype.toString.call(t)}function q(t,e){if(!t||!(t instanceof AbortSignal))return!0;if(!t.aborted)return t.addEventListener("abort",e),function(){t.removeEventListener("abort",e)}}function F(t,e){let{observedAttributes:n=[]}=t.constructor;return n.reduce(function(r,o){return r[pt(o)]=e(t,o),r},{})}function pt(t){return t.replace(/-./g,e=>e[1].toUpperCase())}var d={setDeleteAttr:lt,ssr:"",D:globalThis.document,F:globalThis.DocumentFragment,H:globalThis.HTMLElement,S:globalThis.SVGElement,M:globalThis.MutationObserver};function lt(t,e,n){if(Reflect.set(t,e,n),!!A(n)){if(Reflect.deleteProperty(t,e),t instanceof d.H&&t.getAttribute(e)==="undefined")return t.removeAttribute(e);if(Reflect.get(t,e)==="undefined")return Reflect.set(t,e,"")}}var C="__dde_lifecycleToEvents",O="dde:connected",S="dde:disconnected",P="dde:attributeChanged";var w=[{get scope(){return d.D.body},host:t=>t?t(d.D.body):d.D.body,prevent:!0}],m={get current(){return w[w.length-1]},get host(){return this.current.host},preventDefault(){let{current:t}=this;return t.prevent=!0,t},get state(){return[...w]},push(t={}){return w.push(Object.assign({},this.current,{prevent:!1},t))},pushRoot(){return w.push(w[0])},pop(){if(w.length!==1)return w.pop()}};function X(...t){return this.appendOriginal(...t),this}function ht(t){return t.append===X||(t.appendOriginal=t.append,t.append=X),t}var $;function M(t,e,...n){let r=W(this),o=0,c,s;switch((Object(e)!==e||r.isObservable(e))&&(e={textContent:e}),!0){case typeof t=="function":{o=1,m.push({scope:t,host:(...g)=>g.length?(o===1?n.unshift(...g):g.forEach(p=>p(s)),void 0):s}),c=t(e||void 0);let a=c instanceof d.F;if(c.nodeName==="#comment")break;let h=M.mark({type:"component",name:t.name,host:a?"this":"parentElement"});c.prepend(h),a&&(s=h);break}case t==="#text":c=j.call(this,d.D.createTextNode(""),e);break;case(t==="<>"||!t):c=j.call(this,d.D.createDocumentFragment(),e);break;case!!$:c=j.call(this,d.D.createElementNS($,t),e);break;case!c:c=j.call(this,d.D.createElement(t),e)}return ht(c),s||(s=c),n.forEach(a=>a(s)),o&&m.pop(),o=2,c}function Wt(t,e=t,n=void 0){let r=Symbol.for("default"),o=Array.from(e.querySelectorAll("slot")).reduce((s,a)=>Reflect.set(s,a.name||r,a)&&s,{}),c=T(o,r);if(t.append=new Proxy(t.append,{apply(s,a,h){if(!h.length)return t;let g=d.D.createDocumentFragment();for(let p of h){if(!p||!p.slot){c&&g.appendChild(p);continue}let y=p.slot,_=o[y];gt(p,"remove","slot"),_&&(bt(_,p,n),Reflect.deleteProperty(o,y))}return c&&(o[r].replaceWith(g),Reflect.deleteProperty(o,r)),t.append=s,t}}),t!==e){let s=Array.from(t.childNodes);s.forEach(a=>a.remove()),t.append(...s)}return e}function bt(t,e,n){n&&n(t,e);try{t.replaceWith(j(e,{className:[e.className,t.className],dataset:{...t.dataset}}))}catch{t.replaceWith(e)}}M.mark=function(t,e=!1){t=Object.entries(t).map(([o,c])=>o+`="${c}"`).join(" ");let n=e?"":"/",r=d.D.createComment(`<dde:mark ${t}${d.ssr}${n}>`);return e&&(r.end=d.D.createComment("</dde:mark>")),r};function qt(t){let e=this;return function(...r){$=t;let o=M.call(e,...r);return $=void 0,o}}var U=new WeakMap,{setDeleteAttr:Y}=d;function j(t,...e){if(!e.length)return t;U.set(t,nt(t,this));for(let[n,r]of Object.entries(Object.assign({},...e)))et.call(this,t,n,r);return U.delete(t),t}function et(t,e,n){let{setRemoveAttr:r,s:o}=nt(t,this),c=this;n=o.processReactiveAttribute(t,e,n,(a,h)=>et.call(c,t,a,h));let[s]=e;if(s==="=")return r(e.slice(1),n);if(s===".")return tt(t,e.slice(1),n);if(/(aria|data)([A-Z])/.test(e))return e=e.replace(/([a-z])([A-Z])/g,"$1-$2").toLowerCase(),r(e,n);switch(e==="className"&&(e="class"),e){case"xlink:href":return r(e,n,"http://www.w3.org/1999/xlink");case"textContent":return Y(t,e,n);case"style":if(typeof n!="object")break;case"dataset":return I(o,n,tt.bind(null,t[e]));case"ariaset":return I(o,n,(a,h)=>r("aria-"+a,h));case"classList":return vt.call(c,t,n)}return Et(t,e)?Y(t,e,n):r(e,n)}function nt(t,e){if(U.has(t))return U.get(t);let r=(t instanceof d.S?xt:mt).bind(null,t,"Attribute"),o=W(e);return{setRemoveAttr:r,s:o}}function vt(t,e){let n=W(this);return I(n,e,(r,o)=>t.classList.toggle(r,o===-1?void 0:!!o)),t}function Ft(t){return Array.from(t.children).forEach(e=>e.remove()),t}function gt(t,e,n,r){return t instanceof d.H?t[e+"Attribute"](n,r):t[e+"AttributeNS"](null,n,r)}function Et(t,e){if(!(e in t))return!1;let n=rt(t,e);return!A(n.set)}function rt(t,e){if(t=Object.getPrototypeOf(t),!t)return{};let n=Object.getOwnPropertyDescriptor(t,e);return n||rt(t,e)}function I(t,e,n){if(!(typeof e!="object"||e===null))return Object.entries(e).forEach(function([o,c]){o&&(c=t.processReactiveAttribute(e,o,c,n),Line truncated
-	* Investigate `__dde_attributes` key of the element.*/let[c,s]=o,f=this[Z][c];if(f)return v.action(f,"_set",s)})(t),m.disconnected(function(){/*! This removes all observables mapped to attributes (`O.observedAttributes`).
+	* Investigate `__dde_attributes` key of the element.*/let[c,s]=o,a=this[G][c];if(a)return E.action(a,"_set",s)})(t),x.disconnected(function(){/*! This removes all observables mapped to attributes (`O.observedAttributes`).
-	* Investigate `__dde_attributes` key of the element.*/v.clear(...Object.values(this[Z]))})(t),n};var it={isObservable:U,processReactiveAttribute(t,e,n,r){if(!U(n))return n;let o=c=>{if(!t.isConnected)return S(n,o);r(e,c)};return V(n,o),ut(n,o,t,e),n()}};function ut(t,e,...n){let{current:r}=E;r.prevent||r.host(function(o){o[R]||(o[R]=[],m.disconnected(()=>o[R].forEach(([[c,s]])=>S(c,s,c[l]?.host()===o)))(o)),o[R].push([[t,e],...n])})}function ct(t,e,n){let r=t?()=>st(r):(...o)=>o.length?at(r,...o):st(r);return ft(r,e,n,t)}var Rt=Object.assign(Object.create(null),{stopPropagation(){this.skip=!0}}),G=class extends Error{constructor(){super();let[e,...n]=this.stack.split(`
+	* Investigate `__dde_attributes` key of the element.*/E.clear(...Object.values(this[G]))})(t),n};var ut={isObservable:z,processReactiveAttribute(t,e,n,r){if(!z(n))return n;let o=c=>{if(!t.isConnected)return k(n,o);r(e,c)};return K(n,o),ft(n,o,t,e),n()}};function ft(t,e,...n){let{current:r}=m;r.prevent||r.host(function(o){o[R]||(o[R]=[],x.disconnected(()=>o[R].forEach(([[c,s]])=>k(c,s,c[l]&&c[l].host&&c[l].host()===o)))(o)),o[R].push([[t,e],...n])})}function st(t,e,n){let r=t?()=>it(r):(...o)=>o.length?dt(r,...o):it(r);return at(r,e,n,t)}var Dt=Object.assign(Object.create(null),{stopPropagation(){this.skip=!0}}),V=class extends Error{constructor(){super();let[e,...n]=this.stack.split(`
-`),r=e.slice(e.indexOf("@"),e.indexOf(".js:")+4);this.stack=n.find(o=>!o.includes(r))}};function ft(t,e,n,r=!1){let o=[];K(n)!=="[object Object]"&&(n={});let{onclear:c}=v.symbols;n[c]&&(o.push(n[c]),Reflect.deleteProperty(n,c));let{host:s}=E;return Reflect.defineProperty(t,l,{value:{value:e,actions:n,onclear:o,host:s,listeners:new Set,defined:new G().stack,readonly:r},enumerable:!1,writable:!1,configurable:!0}),t.toJSON=()=>t(),Object.setPrototypeOf(t[l],Rt),t}function St(){return z[z.length-1]}function st(t){if(!t[l])return;let{value:e,listeners:n}=t[l],r=St();return r&&n.add(r),h.has(r)&&h.get(r).add(t),e}function at(t,e,n){if(!t[l])return;let r=t[l];if(!(!n&&r.value===e))return r.value=e,r.listeners.forEach(o=>o(e)),e}function V(t,e){if(t[l])return t[l].listeners.add(e)}function S(t,e,n){let r=t[l];if(!r)return;let o=r.listeners.delete(e);if(n&&!r.listeners.size){if(v.clear(t),!h.has(r))return o;let c=h.get(r);if(!h.has(c))return o;h.get(c).forEach(s=>S(s,c,!0))}return o}H(it);
+`),r=e.slice(e.indexOf("@"),e.indexOf(".js:")+4);this.stack=n.find(o=>!o.includes(r))}};function at(t,e,n,r=!1){let o=[];Q(n)!=="[object Object]"&&(n={});let{onclear:c}=E.symbols;n[c]&&(o.push(n[c]),delete n[c]);let{host:s}=m;return Reflect.defineProperty(t,l,{value:{value:e,actions:n,onclear:o,host:s,listeners:new Set,defined:new V().stack,readonly:r},enumerable:!1,writable:!1,configurable:!0}),t.toJSON=()=>t(),Object.setPrototypeOf(t[l],Dt),t}function Rt(){return H[H.length-1]}function it(t){if(!t[l])return;let{value:e,listeners:n}=t[l],r=Rt();return r&&n.add(r),v.has(r)&&v.get(r).add(t),e}function dt(t,e,n){if(!t[l])return;let r=t[l];if(!(!n&&r.value===e))return r.value=e,r.listeners.forEach(o=>o(e)),e}function K(t,e){if(t[l])return t[l].listeners.add(e)}function k(t,e,n){let r=t[l];if(!r)return;let o=r.listeners.delete(e);if(n&&!r.listeners.size){if(E.clear(t),!v.has(r))return o;let c=v.get(r);if(!v.has(c))return o;v.get(c).forEach(s=>k(s,c,!0))}return o}B(ut);
-globalThis.dde= {O: v,
+globalThis.dde= {O: E,
-assign: P,
+assign: j,
-assignAttribute: tt,
+assignAttribute: et,
-chainableAppend: lt,
+chainableAppend: ht,
-classListDeclarative: bt,
+classListDeclarative: vt,
-createElement: T,
+createElement: M,
-createElementNS: Mt,
+createElementNS: qt,
-customElementRender: It,
+customElementRender: Zt,
-customElementWithDDE: yt,
+customElementWithDDE: wt,
-dispatchEvent: Vt,
+dispatchEvent: Qt,
-el: T,
+el: M,
-elNS: Mt,
+elNS: qt,
-elementAttribute: vt,
+elementAttribute: gt,
-empty: Wt,
+empty: Ft,
-isObservable: U,
+isObservable: z,
-lifecycleToEvents: yt,
+lifecycleToEvents: wt,
-observable: v,
+observable: E,
-observedAttributes: Ot,
+observedAttributes: yt,
-on: m,
+on: x,
-registerReactivity: H,
+registerReactivity: B,
-scope: E,
+scope: m,
-simulateSlots: jt
+simulateSlots: Wt
 };
 
 })();

dist/dde.js

@@ -1,25 +1,25 @@
 //deka-dom-el library is available via global namespace `dde`
 (()=> {
-var C={isObservable(t){return!1},processReactiveAttribute(t,e,n,r){return n}};function G(t,e=!0){return e?Object.assign(C,t):(Object.setPrototypeOf(t,C),t)}function L(t){return C.isPrototypeOf(t)&&t!==C?t:C}function E(t){return typeof t>"u"}function N(t,e){if(!t||!(t instanceof AbortSignal))return!0;if(!t.aborted)return t.addEventListener("abort",e),function(){t.removeEventListener("abort",e)}}function q(t,e){let{observedAttributes:n=[]}=t.constructor;return n.reduce(function(r,o){return Reflect.set(r,V(o),e(t,o)),r},{})}function V(t){return t.replace(/-./g,e=>e[1].toUpperCase())}var a={setDeleteAttr:J,ssr:"",D:globalThis.document,F:globalThis.DocumentFragment,H:globalThis.HTMLElement,S:globalThis.SVGElement,M:globalThis.MutationObserver};function J(t,e,n){if(Reflect.set(t,e,n),!!E(n)){if(Reflect.deleteProperty(t,e),t instanceof a.H&&t.getAttribute(e)==="undefined")return t.removeAttribute(e);if(Reflect.get(t,e)==="undefined")return Reflect.set(t,e,"")}}var 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dist/esm-with-observables.js

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e=e.replace(/([a-z])([A-Z])/g,"$1-$2").toLowerCase(),r(e,n);switch(e==="className"&&(e="class"),e){case"xlink:href":return r(e,n,"http://www.w3.org/1999/xlink");case"textContent":return Y(t,e,n);case"style":if(typeof n!="object")break;case"dataset":return I(o,n,tt.bind(null,t[e]));case"ariaset":return I(o,n,(a,h)=>r("aria-"+a,h));case"classList":return vt.call(c,t,n)}return Et(t,e)?Y(t,e,n):r(e,n)}function nt(t,e){if(U.has(t))return U.get(t);let r=(t instanceof d.S?xt:mt).bind(null,t,"Attribute"),o=W(e);return{setRemoveAttr:r,s:o}}function vt(t,e){let n=W(this);return I(n,e,(r,o)=>t.classList.toggle(r,o===-1?void 0:!!o)),t}function Ft(t){return Array.from(t.children).forEach(e=>e.remove()),t}function gt(t,e,n,r){return t instanceof d.H?t[e+"Attribute"](n,r):t[e+"AttributeNS"](null,n,r)}function Et(t,e){if(!(e in t))return!1;let n=rt(t,e);return!A(n.set)}function rt(t,e){if(t=Object.getPrototypeOf(t),!t)return{};let n=Object.getOwnPropertyDescriptor(t,e);return n||rt(t,e)}function I(t,e,n){if(!(typeof e!="object"||e===null))return Object.entries(e).forEach(function([o,c]){o&&(c=t.processReactiveAttribute(e,o,c,n),Line truncated
-	* Investigate `__dde_attributes` key of the element.*/let[c,s]=o,f=this[Z][c];if(f)return v.action(f,"_set",s)})(t),m.disconnected(function(){/*! This removes all observables mapped to attributes (`O.observedAttributes`).
+	* Investigate `__dde_attributes` key of the element.*/let[c,s]=o,a=this[G][c];if(a)return E.action(a,"_set",s)})(t),x.disconnected(function(){/*! This removes all observables mapped to attributes (`O.observedAttributes`).
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+	* Investigate `__dde_attributes` key of the element.*/E.clear(...Object.values(this[G]))})(t),n};var ut={isObservable:z,processReactiveAttribute(t,e,n,r){if(!z(n))return n;let o=c=>{if(!t.isConnected)return k(n,o);r(e,c)};return K(n,o),ft(n,o,t,e),n()}};function ft(t,e,...n){let{current:r}=m;r.prevent||r.host(function(o){o[R]||(o[R]=[],x.disconnected(()=>o[R].forEach(([[c,s]])=>k(c,s,c[l]&&c[l].host&&c[l].host()===o)))(o)),o[R].push([[t,e],...n])})}function st(t,e,n){let r=t?()=>it(r):(...o)=>o.length?dt(r,...o):it(r);return at(r,e,n,t)}var Dt=Object.assign(Object.create(null),{stopPropagation(){this.skip=!0}}),V=class extends Error{constructor(){super();let[e,...n]=this.stack.split(`
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+`),r=e.slice(e.indexOf("@"),e.indexOf(".js:")+4);this.stack=n.find(o=>!o.includes(r))}};function at(t,e,n,r=!1){let o=[];Q(n)!=="[object Object]"&&(n={});let{onclear:c}=E.symbols;n[c]&&(o.push(n[c]),delete n[c]);let{host:s}=m;return Reflect.defineProperty(t,l,{value:{value:e,actions:n,onclear:o,host:s,listeners:new Set,defined:new V().stack,readonly:r},enumerable:!1,writable:!1,configurable:!0}),t.toJSON=()=>t(),Object.setPrototypeOf(t[l],Dt),t}function Rt(){return H[H.length-1]}function it(t){if(!t[l])return;let{value:e,listeners:n}=t[l],r=Rt();return r&&n.add(r),v.has(r)&&v.get(r).add(t),e}function dt(t,e,n){if(!t[l])return;let r=t[l];if(!(!n&&r.value===e))return r.value=e,r.listeners.forEach(o=>o(e)),e}function K(t,e){if(t[l])return t[l].listeners.add(e)}function k(t,e,n){let r=t[l];if(!r)return;let o=r.listeners.delete(e);if(n&&!r.listeners.size){if(E.clear(t),!v.has(r))return o;let c=v.get(r);if(!v.has(c))return o;v.get(c).forEach(s=>k(s,c,!0))}return o}B(ut);export{E as O,j as assign,et as assignAttribute,ht as chainableAppend,vt as classListDeclarative,M as createElement,qt as createElementNS,Zt as customElementRender,wt as customElementWithDDE,Qt as dispatchEvent,M as el,qt as elNS,gt as elementAttribute,Ft as empty,z as isObservable,wt as lifecycleToEvents,E as observable,yt as observedAttributes,x as on,B as registerReactivity,m as scope,Wt as simulateSlots};

dist/esm.js

@@ -1 +1 @@
-var C={isObservable(t){return!1},processReactiveAttribute(t,e,n,r){return n}};function G(t,e=!0){return e?Object.assign(C,t):(Object.setPrototypeOf(t,C),t)}function L(t){return C.isPrototypeOf(t)&&t!==C?t:C}function E(t){return typeof t>"u"}function N(t,e){if(!t||!(t instanceof AbortSignal))return!0;if(!t.aborted)return t.addEventListener("abort",e),function(){t.removeEventListener("abort",e)}}function q(t,e){let{observedAttributes:n=[]}=t.constructor;return n.reduce(function(r,o){return Reflect.set(r,V(o),e(t,o)),r},{})}function V(t){return t.replace(/-./g,e=>e[1].toUpperCase())}var a={setDeleteAttr:J,ssr:"",D:globalThis.document,F:globalThis.DocumentFragment,H:globalThis.HTMLElement,S:globalThis.SVGElement,M:globalThis.MutationObserver};function J(t,e,n){if(Reflect.set(t,e,n),!!E(n)){if(Reflect.deleteProperty(t,e),t instanceof a.H&&t.getAttribute(e)==="undefined")return t.removeAttribute(e);if(Reflect.get(t,e)==="undefined")return Reflect.set(t,e,"")}}var x="__dde_lifecycleToEvents",v="dde:connected",y="dde:disconnected",D="dde:attributeChanged";var g=[{get scope(){return a.D.body},host:t=>t?t(a.D.body):a.D.body,prevent:!0}],R={get current(){return g[g.length-1]},get host(){return this.current.host},preventDefault(){let{current:t}=this;return t.prevent=!0,t},get state(){return[...g]},push(t={}){return g.push(Object.assign({},this.current,{prevent:!1},t))},pushRoot(){return g.push(g[0])},pop(){if(g.length!==1)return g.pop()}};function F(...t){return this.appendOriginal(...t),this}function K(t){return t.append===F||(t.appendOriginal=t.append,t.append=F),t}var T;function k(t,e,...n){let r=L(this),o=0,c,f;switch((Object(e)!==e||r.isObservable(e))&&(e={textContent:e}),!0){case typeof t=="function":{o=1,R.push({scope:t,host:(...b)=>b.length?(o===1?n.unshift(...b):b.forEach(l=>l(f)),void 0):f}),c=t(e||void 0);let d=c instanceof a.F;if(c.nodeName==="#comment")break;let p=k.mark({type:"component",name:t.name,host:d?"this":"parentElement"});c.prepend(p),d&&(f=p);break}case t==="#text":c=O.call(this,a.D.createTextNode(""),e);break;case(t==="<>"||!t):c=O.call(this,a.D.createDocumentFragment(),e);break;case!!T:c=O.call(this,a.D.createElementNS(T,t),e);break;case!c:c=O.call(this,a.D.createElement(t),e)}return K(c),f||(f=c),n.forEach(d=>d(f)),o&&R.pop(),o=2,c}function lt(t,e=t,n=void 0){let r=Symbol.for("default"),o=Array.from(e.querySelectorAll("slot")).reduce((f,d)=>Reflect.set(f,d.name||r,d)&&f,{}),c=Reflect.has(o,r);if(t.append=new Proxy(t.append,{apply(f,d,p){if(!p.length)return t;let b=a.D.createDocumentFragment();for(let l of p){if(!l||!l.slot){c&&b.appendChild(l);continue}let A=l.slot,_=o[A];Y(l,"remove","slot"),_&&(Q(_,l,n),Reflect.deleteProperty(o,A))}return c&&(o[r].replaceWith(b),Reflect.deleteProperty(o,r)),t.append=f,t}}),t!==e){let f=Array.from(t.childNodes);f.forEach(d=>d.remove()),t.append(...f)}return e}function Q(t,e,n){n&&n(t,e);try{t.replaceWith(O(e,{className:[e.className,t.className],dataset:{...t.dataset}}))}catch{t.replaceWith(e)}}k.mark=function(t,e=!1){t=Object.entries(t).map(([o,c])=>o+`="${c}"`).join(" ");let n=e?"":"/",r=a.D.createComment(`<dde:mark ${t}${a.ssr}${n}>`);return e&&(r.end=a.D.createComment("</dde:mark>")),r};function ht(t){let e=this;return function(...r){T=t;let o=k.call(e,...r);return T=void 0,o}}var M=new WeakMap,{setDeleteAttr:$}=a;function O(t,...e){if(!e.length)return t;M.set(t,z(t,this));for(let[n,r]of Object.entries(Object.assign({},...e)))H.call(this,t,n,r);return M.delete(t),t}function H(t,e,n){let{setRemoveAttr:r,s:o}=z(t,this),c=this;n=o.processReactiveAttribute(t,e,n,(d,p)=>H.call(c,t,d,p));let[f]=e;if(f==="=")return r(e.slice(1),n);if(f===".")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(),r(e,n);switch(e==="className"&&(e="class"),e){case"xlink:href":return r(e,n,"http://www.w3.org/1999/xlink");case"textContent":return $(t,e,n);case"style":if(typeof n!="object")break;case"dataset":return P(o,n,U.bind(null,t[e]));case"ariaset":return P(o,n,(d,p)=>r("aria-"+d,p));case"classList":return X.call(c,t,n)}return tt(t,e)?$(t,e,n):r(e,n)}function z(t,e){if(M.has(t))return M.get(t);let r=(t instanceof a.S?nt:et).bind(null,t,"Attribute"),o=L(e);return{setRemoveAttr:r,s:o}}function X(t,e){let n=L(this);return P(n,e,(r,o)=>t.classList.toggle(r,o===-1?void 0:!!o)),t}function bt(t){return Array.from(t.children).forEach(e=>e.remove()),t}function Y(t,e,n,r){return t instanceof a.H?t[e+"Attribute"](n,r):t[e+"AttributeNS"](null,n,r)}function tt(t,e){if(!Reflect.has(t,e))return!1;let n=B(t,e);return!E(n.set)}function B(t,e){if(t=Object.getPrototypeOf(t),!t)return{};let n=Object.getOwnPropertyDescriptor(t,e);return n||B(t,e)}function P(t,e,n){if(!(typeof e!="object"||e===null))return 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+var C={isObservable(t){return!1},processReactiveAttribute(t,e,n,r){return n}};function V(t,e=!0){return e?Object.assign(C,t):(Object.setPrototypeOf(t,C),t)}function L(t){return C.isPrototypeOf(t)&&t!==C?t:C}var q=(...t)=>Object.prototype.hasOwnProperty.call(...t);function E(t){return typeof t>"u"}function N(t,e){if(!t||!(t instanceof AbortSignal))return!0;if(!t.aborted)return t.addEventListener("abort",e),function(){t.removeEventListener("abort",e)}}function F(t,e){let{observedAttributes:n=[]}=t.constructor;return n.reduce(function(r,o){return r[J(o)]=e(t,o),r},{})}function J(t){return t.replace(/-./g,e=>e[1].toUpperCase())}var a={setDeleteAttr:K,ssr:"",D:globalThis.document,F:globalThis.DocumentFragment,H:globalThis.HTMLElement,S:globalThis.SVGElement,M:globalThis.MutationObserver};function K(t,e,n){if(Reflect.set(t,e,n),!!E(n)){if(Reflect.deleteProperty(t,e),t instanceof a.H&&t.getAttribute(e)==="undefined")return t.removeAttribute(e);if(Reflect.get(t,e)==="undefined")return 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p=k.mark({type:"component",name:t.name,host:d?"this":"parentElement"});c.prepend(p),d&&(f=p);break}case t==="#text":c=D.call(this,a.D.createTextNode(""),e);break;case(t==="<>"||!t):c=D.call(this,a.D.createDocumentFragment(),e);break;case!!T:c=D.call(this,a.D.createElementNS(T,t),e);break;case!c:c=D.call(this,a.D.createElement(t),e)}return Q(c),f||(f=c),n.forEach(d=>d(f)),o&&R.pop(),o=2,c}function bt(t,e=t,n=void 0){let r=Symbol.for("default"),o=Array.from(e.querySelectorAll("slot")).reduce((f,d)=>Reflect.set(f,d.name||r,d)&&f,{}),c=q(o,r);if(t.append=new Proxy(t.append,{apply(f,d,p){if(!p.length)return t;let b=a.D.createDocumentFragment();for(let l of p){if(!l||!l.slot){c&&b.appendChild(l);continue}let A=l.slot,_=o[A];tt(l,"remove","slot"),_&&(X(_,l,n),Reflect.deleteProperty(o,A))}return c&&(o[r].replaceWith(b),Reflect.deleteProperty(o,r)),t.append=f,t}}),t!==e){let f=Array.from(t.childNodes);f.forEach(d=>d.remove()),t.append(...f)}return e}function 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r(e,n,"http://www.w3.org/1999/xlink");case"textContent":return U(t,e,n);case"style":if(typeof n!="object")break;case"dataset":return M(o,n,H.bind(null,t[e]));case"ariaset":return M(o,n,(d,p)=>r("aria-"+d,p));case"classList":return Y.call(c,t,n)}return et(t,e)?U(t,e,n):r(e,n)}function B(t,e){if(P.has(t))return P.get(t);let r=(t instanceof a.S?rt:nt).bind(null,t,"Attribute"),o=L(e);return{setRemoveAttr:r,s:o}}function Y(t,e){let n=L(this);return M(n,e,(r,o)=>t.classList.toggle(r,o===-1?void 0:!!o)),t}function gt(t){return Array.from(t.children).forEach(e=>e.remove()),t}function tt(t,e,n,r){return t instanceof a.H?t[e+"Attribute"](n,r):t[e+"AttributeNS"](null,n,r)}function et(t,e){if(!(e in t))return!1;let n=I(t,e);return!E(n.set)}function I(t,e){if(t=Object.getPrototypeOf(t),!t)return{};let n=Object.getOwnPropertyDescriptor(t,e);return n||I(t,e)}function M(t,e,n){if(!(typeof e!="object"||e===null))return Object.entries(e).forEach(function([o,c]){o&&(c=t.processReactiveAttribute(e,o,c,n),n(o,c))})}function Z(t){return Array.isArray(t)?t.filter(Boolean).join(" "):t}function nt(t,e,n,r){return t[(E(r)?"remove"Line truncated

examples/components/todosComponent.js

@@ -16,10 +16,12 @@ const className= style.host(todosComponent).css`
 `;
 /** @param {{ todos: string[] }} */
 export function todosComponent({ todos= [ "Task A" ] }= {}){
-	const todosO= O(todos.map(t=> O(t)), {
+	let key= 0;
-		add(v){ this.value.push(O(v)); },
+	const todosO= O(new Map(), {
-		remove(i){ O.clear(this.value.splice(i, 1)[0]); }
+		add(v){ this.value.set(key++, O(v)); },
+		remove(key){ O.clear(this.value.get(key)); this.value.delete(key); }
 	});
+	todos.forEach(text=> O.action(todosO, "add", text));
 
 	const name= "todoName";
 	const onsubmitAdd= on("submit", event=> {
@@ -31,24 +33,16 @@ export function todosComponent({ todos= [ "Task A" ] }= {}){
 	const onremove= on("remove", event=>
 		O.action(todosO, "remove", event.detail));
 	
-	const ul_todos_version= 1; // ul_todos_v1/ul_todos_v2
-	const ul_todos_v1= el("ul").append(
-		O.el(todosO, ts=> ts
-			.map((textContent, value)=>
-				el(todoComponent, { textContent, value, className }, onremove))
-	));
-	const ul_todos_v2= ts=> el("ul").append(
-		...ts.map((textContent, value)=>
-			el(todoComponent, { textContent, value, className }, onremove))
-	);
-	
 	return el("div", { className }).append(
 		el("div").append(
 			el("h2", "Todos:"),
 			el("h3", "List of todos:"),
-			O.el(todosO, ts=> !ts.length
+			O.el(todosO, (ts, memo)=> !ts.size
 				? el("p", "No todos yet")
-				: ( !(ul_todos_version-1) ? ul_todos_v1 : ul_todos_v2(ts) )
+				: el("ul").append(
+					...Array.from(ts).map(([ value, textContent ])=>
+						memo(value, ()=> el(todoComponent, { textContent, value, className }, onremove)))
+				)
 			),
 			el("p", "Click to the text to edit it.")
 		),
@@ -61,7 +55,7 @@ export function todosComponent({ todos= [ "Task A" ] }= {}){
 		),
 		el("div").append(
 			el("h3", "Output (JSON):"),
-			el("output", O(()=> JSON.stringify(todosO, null, "\t")))
+			el("output", O(()=> JSON.stringify(Array.from(todosO()), null, "\t")))
 		)
 	)
 }

package.json

@@ -79,7 +79,7 @@
 		},
 		{
 			"path": "./index-with-observables.js",
-			"limit": "5 kB"
+			"limit": "5.25 kB"
 		}
 	],
 	"modifyEsbuildConfig": {

src/dom.js

@@ -65,12 +65,13 @@ export function createElement(tag, attributes, ...addons){
 	scoped= 2;
 	return el;
 }
+import { hasOwn } from "./helpers.js";
 /** @param {HTMLElement} element @param {HTMLElement} [root] */
 export function simulateSlots(element, root= element, mapper= undefined){
 	const _default= Symbol.for("default");
 	const slots= Array.from(root.querySelectorAll("slot"))
 		.reduce((out, curr)=> Reflect.set(out, curr.name || _default, curr) && out, {});
-	const has_d= Reflect.has(slots, _default);
+	const has_d= hasOwn(slots, _default);
 	element.append= new Proxy(element.append, {
 		apply(orig, _, els){
 			if(!els.length) return element;
@@ -198,7 +199,7 @@ export function elementAttribute(element, op, key, value){
 import { isUndef } from "./helpers.js";
 //TODO add cache? `(Map/Set)<el.tagName+key,isUndef>`
 function isPropSetter(el, key){
-	if(!Reflect.has(el, key)) return false;
+	if(!(key in el)) return false;
 	const des= getPropDescriptor(el, key);
 	return !isUndef(des.set);
 }

src/helpers.js

@@ -1,3 +1,4 @@
+export const hasOwn= (...a)=> Object.prototype.hasOwnProperty.call(...a);
 export function isUndef(value){ return typeof value==="undefined"; }
 export function typeOf(v){
 	const t= typeof v;
@@ -19,7 +20,7 @@ export function observedAttributes(instance, observedAttribute){
 	const { observedAttributes= [] }= instance.constructor;
 	return observedAttributes
 		.reduce(function(out, name){
-			Reflect.set(out, kebabToCamel(name), observedAttribute(instance, name));
+			out[kebabToCamel(name)]= observedAttribute(instance, name);
 			return out;
 		}, {});
 }

src/observables-lib.js

@@ -1,7 +1,8 @@
 export const mark= "__dde_observable";
+import { hasOwn } from "./helpers.js";
 
 export function isObservable(candidate){
-	try{ return Reflect.has(candidate, mark); }
+	try{ return hasOwn(candidate, mark); }
 	catch(e){ return false; }
 }
 /** @type {function[]} */
@@ -45,10 +46,10 @@ export function observable(value, actions){
 export { observable as O };
 observable.action= function(o, name, ...a){
 	const s= o[mark], { actions }= s;
-	if(!actions || !Reflect.has(actions, name))
+	if(!actions || !(name in actions))
 		throw new Error(`'${o}' has no action with name '${name}'!`);
 	actions[name].apply(s, a);
-	if(s.skip) return Reflect.deleteProperty(s, "skip");
+	if(s.skip) return (delete s.skip);
 	s.listeners.forEach(l=> l(s.value));
 };
 observable.on= function on(o, listener, options= {}){
@@ -65,11 +66,12 @@ observable.symbols= {
 };
 observable.clear= function(...observables){
 	for(const o of observables){
-		Reflect.deleteProperty(o, "toJSON");
 		const s= o[mark];
+		if(!s) continue;
+		delete o.toJSON;
 		s.onclear.forEach(f=> f.call(s));
 		clearListDeps(o, s);
-		Reflect.deleteProperty(o, mark);
+		delete o[mark];
 	}
 	function clearListDeps(o, s){
 		s.listeners.forEach(l=> {
@@ -89,24 +91,38 @@ const key_reactive= "__dde_reactive";
 import { enviroment as env } from "./dom-common.js";
 import { el } from "./dom.js";
 import { scope } from "./dom.js";
+// TODO: third argument for handle `cache_tmp` in re-render
 observable.el= function(o, map){
 	const mark_start= el.mark({ type: "reactive" }, true);
 	const mark_end= mark_start.end;
 	const out= env.D.createDocumentFragment();
 	out.append(mark_start, mark_end);
 	const { current }= scope;
+	let cache= {};
 	const reRenderReactiveElement= v=> {
-		if(!mark_start.parentNode || !mark_end.parentNode) // isConnected or wasn’t yet rendered
+		if(!mark_start.parentNode || !mark_end.parentNode) // === `isConnected` or wasn’t yet rendered
 			return removeObservableListener(o, reRenderReactiveElement);
+		const cache_tmp= cache; // will be reused in the useCache or removed in the while loop on the end
+		cache= {};
 		scope.push(current);
-		let els= map(v);
+		let els= map(v, function useCache(key, fun){
+			let value;
+			if(hasOwn(cache_tmp, key)){
+				value= cache_tmp[key];
+				delete cache_tmp[key];
+			} else
+				value= fun();
+			cache[key]= value;
+			return value;
+		});
 		scope.pop();
 		if(!Array.isArray(els))
 			els= [ els ];
-		let el_r= mark_start;
-		while(( el_r= mark_start.nextSibling ) !== mark_end)
-			el_r.remove();
 		mark_start.after(...els);
+		const el_last_keep= els[els.length-1];
+		let el_r;
+		while(( el_r= el_last_keep.nextSibling ) !== mark_end)
+			el_r.remove();
 		if(mark_start.isConnected)
 			requestCleanUpReactives(current.host());
 	};
@@ -183,7 +199,7 @@ function removeObservablesFromElements(o, listener, ...notes){
 				 * You can investigate the `__dde_reactive` key of the element.
 				 * */
 				element[key_reactive].forEach(([ [ o, listener ] ])=>
-					removeObservableListener(o, listener, o[mark]?.host() === element))
+					removeObservableListener(o, listener, o[mark] && o[mark].host && o[mark].host() === element))
 			)(element);
 		}
 		element[key_reactive].push([ [ o, listener ], ...notes ]);
@@ -216,7 +232,7 @@ function toObservable(o, value, actions, readonly= false){
 	const { onclear: ocs }= observable.symbols;
 	if(actions[ocs]){
 		onclear.push(actions[ocs]);
-		Reflect.deleteProperty(actions, ocs);
+		delete actions[ocs];
 	}
 	const { host }= scope;
 	Reflect.defineProperty(o, mark, {
@@ -270,4 +286,4 @@ function removeObservableListener(o, listener, clear_when_empty){
 		deps.get(c).forEach(sig=> removeObservableListener(sig, c, true));
 	}
 	return out;
-}
+}