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of["connected","disconnected"])U(t.prototype,n+"Callback",function(c,r,o){c.apply(r,o),r.dispatchEvent(new Event("dde:"+n))});let e="attributeChanged";return U(t.prototype,e+"Callback",function(n,c,r){let[o,,s]=r;c.dispatchEvent(new CustomEvent("dde:"+e,{detail:[o,s]})),n.apply(c,r)}),t.prototype.__dde_lifecycleToEvents=!0,t}function U(t,e,n){t[e]=new Proxy(t[e]||(()=>{}),{apply:n})}function K(t){return L(t,(e,n)=>e.getAttribute(n))}function bt(t,e,n){return e||(e={}),function(r,...o){n&&(o.unshift(r),r=typeof n=="function"?n():n);let s=o.length?new CustomEvent(t,Object.assign({detail:o[0]},e)):new Event(t,e);return r.dispatchEvent(s)}}function A(t,e,n){return function(r){return r.addEventListener(t,e,n),r}}var O=X(),Q=new WeakSet;A.connected=function(t,e){let{custom_element:n}=g.current,c="connected";return typeof e!="object"&&(e={}),e.once=!0,function(o){n&&(o=n);let s="dde:"+c;return o.addEventListener(s,t,e),o.__dde_lifecycleToEvents?o:o.isConnected?(o.dispatchEvent(new Event(s)),o):(y(e.signal,()=>O.offConnected(o,t))&&O.onConnected(o,t),o)}};A.disconnected=function(t,e){let{custom_element:n}=g.current,c="disconnected";return typeof e!="object"&&(e={}),e.once=!0,function(o){n&&(o=n);let s="dde:"+c;return o.addEventListener(s,t,e),o.__dde_lifecycleToEvents||y(e.signal,()=>O.offDisconnected(o,t))&&O.onDisconnected(o,t),o}};var D=new WeakMap;A.disconnectedAsAbort=function(t){if(D.has(t))return D.get(t);let e=new AbortController;return D.set(t,e),t(A.disconnected(()=>e.abort())),e};A.attributeChanged=function(t,e){let n="attributeChanged";return typeof e!="object"&&(e={}),function(r){let o="dde:"+n;if(r.addEventListener(o,t,e),r.__dde_lifecycleToEvents||Q.has(r))return r;let s=new MutationObserver(function(d){for(let{attributeName:l,target:p}of d)p.dispatchEvent(new CustomEvent(o,{detail:[l,p.getAttribute(l)]}))});return y(e.signal,()=>s.disconnect())&&s.observe(r,{attributes:!0}),r}};function X(){let t=new Map,e=!1,n=new MutationObserver(function(i){for(let u of i)if(u.type==="childList"){if(l(u.addedNodes,!0)){s();continue}p(u.removedNodes,!0)&&s()}});return{onConnected(i,u){o();let f=r(i);f.connected.has(u)||(f.connected.add(u),f.length_c+=1)},offConnected(i,u){if(!t.has(i))return;let f=t.get(i);f.connected.has(u)&&(f.connected.delete(u),f.length_c-=1,c(i,f))},onDisconnected(i,u){o();let f=r(i);f.disconnected.has(u)||(f.disconnected.add(u),f.length_d+=1)},offDisconnected(i,u){if(!t.has(i))return;let f=t.get(i);f.disconnected.has(u)&&(f.disconnected.delete(u),f.length_d-=1,c(i,f))}};function c(i,u){u.length_c||u.length_d||(t.delete(i),s())}function r(i){if(t.has(i))return t.get(i);let u={connected:new WeakSet,length_c:0,disconnected:new WeakSet,length_d:0};return t.set(i,u),u}function o(){e||(e=!0,n.observe(document.body,{childList:!0,subtree:!0}))}function s(){!e||t.size||(e=!1,n.disconnect())}function a(){return new Promise(function(i){(requestIdleCallback||requestAnimationFrame)(i)})}async function d(i){t.size>30&&await a();let u=[];if(!(i instanceof Node))return u;for(let f of t.keys())f===i||!(f instanceof Node)||i.contains(f)&&u.push(f);return u}function l(i,u){let f=!1;for(let h of i){if(u&&d(h).then(l),!t.has(h))continue;let E=t.get(h);E.length_c&&(h.dispatchEvent(new Event("dde:connected")),E.connected=new WeakSet,E.length_c=0,E.length_d||t.delete(h),f=!0)}return f}function p(i,u){let f=!1;for(let h of i)u&&d(h).then(p),!(!t.has(h)||!t.get(h).length_d)&&(h.dispatchEvent(new Event("dde:disconnected")),t.delete(h),f=!0);return f}}export{x as assign,T as assignAttribute,B as chainableAppend,I as classListDeclarative,N as createElement,st as createElementNS,dt as customElementRender,pt as customElementWithDDE,bt as dispatchEvent,N as el,st as elNS,Z as elementAttribute,it as empty,pt as lifecycleToEvents,K as observedAttributes,A as on,q as registerReactivity,g as scope,ct as simulateSlots}; diff --git a/docs/p04-observables.html b/docs/p04-observables.html index 85f730a..ae89d3b 100644 --- a/docs/p04-observables.html +++ b/docs/p04-observables.html @@ -121,7 +121,7 @@ document.head.append( const interval= 5 * 1000; setTimeout(clearInterval, 10*interval, setInterval(()=> count(count()+1), interval)); -

To derived attribute based on value of observable variable just use the observable as a value of the attribute (assign(element, { attribute: O('value') })). assign/el provides ways to glue reactive attributes/classes more granularly into the DOM. Just use dedicated build-in attributes dataset, ariaset and classList.

For computation, you can use the derived observable (see above) like assign(element, { textContent: O(()=> 'Hello '+WorldObservable()) }).

To represent part of the template filled dynamically based on the observable value use O.el(observable, DOMgenerator). This was already used in the todo example above or see:

import { O } from "https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-observables.js"; +

To derived attribute based on value of observable variable just use the observable as a value of the attribute (assign(element, { attribute: O('value') })). assign/el provides ways to glue reactive attributes/classes more granularly into the DOM. Just use dedicated build-in attributes dataset, ariaset and classList.

For computation, you can use the “derived observable” (see above) like assign(element, { textContent: O(()=> 'Hello '+WorldObservable()) }). This is read-only observable its value is computed based on given function and updated when any observable used in the function changes.

To represent part of the template filled dynamically based on the observable value use O.el(observable, DOMgenerator). This was already used in the todo example above or see:

import { O } from "https://cdn.jsdelivr.net/gh/jaandrle/deka-dom-el/dist/esm-with-observables.js"; const count= O(0, { add(){ this.value= this.value + Math.round(Math.random()*10); } }); @@ -147,4 +147,4 @@ setTimeout(clearInterval, 10*interval, setInterval(function(){ O.action(count, "add"); O.action(numbers, "push", count()); }, interval)); -

# Mnemonic

\ No newline at end of file +

# Mnemonic

\ No newline at end of file diff --git a/examples/components/webComponent.js b/examples/components/webComponent.js index f1c994c..7f334ec 100644 --- a/examples/components/webComponent.js +++ b/examples/components/webComponent.js @@ -12,26 +12,30 @@ export class CustomHTMLTestElement extends HTMLElement{ } connectedCallback(){ if(!this.hasAttribute("pre-name")) this.setAttribute("pre-name", "default"); - console.log(observedAttributes(this)); this.attachShadow({ mode: "open" }).append( - customElementRender(this, this.render) + customElementRender(this, this.render, this.attributes) ); } - render(test){ + attributes(element){ + const observed= O.observedAttributes(element); + return Object.assign({ test: element.test }, observed); + } + render({ name, preName, test }){ console.log(scope.state); scope.host( on.connected(()=> console.log(CustomHTMLTestElement)), on.attributeChanged(e=> console.log(e)), on.disconnected(()=> console.log(CustomHTMLTestElement)) ); - const name= O.attribute("name"); - const preName= O.attribute("pre-name"); - - console.log({ name, test, preName}); + const text= text=> el().append( + el("#text", text), + " | " + ); return el("p").append( - el("#text", name), - el("#text", preName), + text(test), + text(name), + text(preName), el("button", { type: "button", textContent: "pre-name", onclick: ()=> preName("Ahoj") }) ); } diff --git a/package.json b/package.json index 0f285ee..13a1bd1 100644 --- a/package.json +++ b/package.json @@ -1,6 +1,6 @@ { "name": "deka-dom-el", - "version": "0.7.5", + "version": "0.7.6", "description": "A low-code library that simplifies the creation of native DOM elements/components using small wrappers and tweaks.", "author": "Jan Andrle ", "license": "MIT", @@ -46,6 +46,7 @@ "browser": true, "undef": "true", "latedef": "true", + "-W014": true, "maxparams": 5, "maxdepth": 3, "maxcomplexity": 14, @@ -58,7 +59,7 @@ "size-limit": [ { "path": "./index.js", - "limit": "9.75 kB", + "limit": "9.85 kB", "gzip": false, "brotli": false diff --git a/src/customElement.js b/src/customElement.js index 17f0a31..a769f85 100644 --- a/src/customElement.js +++ b/src/customElement.js @@ -5,7 +5,7 @@ export function customElementRender(custom_element, render, props= observedAttri host: (...c)=> c.length ? c.forEach(c=> c(custom_element)) : custom_element, custom_element }); - if(typeof props==="function") props= props(custom_element); + if(typeof props==="function") props= props.call(custom_element, custom_element); const out= render.call(custom_element, props); scope.pop(); return out; @@ -33,20 +33,7 @@ function wrapMethod(obj, method, apply){ obj[method]= new Proxy(obj[method] || (()=> {}), { apply }); } -function observedAttribute(instance, name){ - const out= (...args)=> !args.length - ? instance.getAttribute(name) - : instance.setAttribute(name, ...args); - out.attribute= name; - return out; -} +import { observedAttributes as oA } from "./helpers.js"; export function observedAttributes(instance){ - const { observedAttributes= [] }= instance.constructor; - return observedAttributes - .reduce(function(out, name){ - Reflect.set(out, kebabToCamel(name), observedAttribute(instance, name)); - return out; - }, {}); - ; + return oA(instance, (i, n)=> i.getAttribute(n)); } -function kebabToCamel(name){ return name.replace(/-./g, x=> x[1].toUpperCase()); } diff --git a/src/events.js b/src/events.js index 6f743e4..537bf65 100644 --- a/src/events.js +++ b/src/events.js @@ -84,6 +84,7 @@ on.attributeChanged= function(listener, options){ }); const c= onAbort(options.signal, ()=> observer.disconnect()); if(c) observer.observe(element, { attributes: true }); + //TODO: clean up when element disconnected return element; }; }; diff --git a/src/helpers.js b/src/helpers.js index 80c2ee2..44cf4bb 100644 --- a/src/helpers.js +++ b/src/helpers.js @@ -15,3 +15,12 @@ export function onAbort(signal, listener){ signal.removeEventListener("abort", listener); }; } +export function observedAttributes(instance, observedAttribute){ + const { observedAttributes= [] }= instance.constructor; + return observedAttributes + .reduce(function(out, name){ + Reflect.set(out, kebabToCamel(name), observedAttribute(instance, name)); + return out; + }, {}); +} +function kebabToCamel(name){ return name.replace(/-./g, x=> x[1].toUpperCase()); } diff --git a/src/observables-lib.js b/src/observables-lib.js index 58b621d..ae40c49 100644 --- a/src/observables-lib.js +++ b/src/observables-lib.js @@ -9,7 +9,7 @@ const stack_watch= []; /** * ### `WeakMap>>` * The `Set` is in the form of `[ source, ...depended observables (DSs) ]`. - * When the DS is cleaned (`S.clear`) it is removed from DSs, + * When the DS is cleaned (`O.clear`) it is removed from DSs, * if remains only one (`source`) it is cleared too. * ### `WeakMap` * This is used for revesed deps, the `function` is also key for `deps`. @@ -113,41 +113,38 @@ observable.el= function(o, map){ return out; }; import { on } from "./events.js"; +import { observedAttributes } from "./helpers.js"; +function observedAttribute(instance, name){ + const out= (...args)=> !args.length + ? instance.getAttribute(name) + : instance.setAttribute(name, ...args); + out.attribute= name; + return out; +} const key_attributes= "__dde_attributes"; -observable.attribute= function(name, initial= null){ - //TODO host=element & reuse existing - const out= observable(initial); - let element; - scope.host(el=> { - element= el; - if(elementAttribute(element, "has", name)) out(elementAttribute(element, "get", name)); - else if(initial!==null) elementAttribute(element, "set", name, initial); - - if(el[key_attributes]){ - el[key_attributes][name]= out; - return; - } - element[key_attributes]= { [name]: out }; - on.attributeChanged(function attributeChangeToObservable({ detail }){ - /*! This maps attributes to observables (`S.attribute`). - * Investigate `__dde_attributes` key of the element.*/ - const [ name, value ]= detail; - const curr= element[key_attributes][name]; - if(curr) return curr(value); - })(element); - on.disconnected(function(){ - /*! This removes all observables mapped to attributes (`S.attribute`). - * Investigate `__dde_attributes` key of the element.*/ - observable.clear(...Object.values(element[key_attributes])); - })(element); - }); - return new Proxy(out, { - apply(target, _, args){ - if(!args.length) return target(); - const value= args[0]; - return elementAttribute(element, "set", name, value); - } +observable.observedAttributes= function(element){ + const attrs= observedAttributes(element, observedAttribute); + const store= element[key_attributes]= {}; + const actions= { + _set(value){ this.value= value; }, + }; + Object.keys(attrs).forEach(name=> { + const attr= attrs[name]= toObservable(attrs[name], attrs[name](), actions); + store[attr.attribute]= attr; }); + on.attributeChanged(function attributeChangeToObservable({ detail }){ + /*! This maps attributes to observables (`O.observedAttributes`). + * Investigate `__dde_attributes` key of the element.*/ + const [ name, value ]= detail; + const curr= element[key_attributes][name]; + if(curr) return observable.action(curr, "_set", value); + })(element); + on.disconnected(function(){ + /*! This removes all observables mapped to attributes (`O.observedAttributes`). + * Investigate `__dde_attributes` key of the element.*/ + observable.clear(...Object.values(element[key_attributes])); + })(element); + return attrs; }; import { typeOf } from './helpers.js'; @@ -169,7 +166,7 @@ function removeObservablesFromElements(o, listener, ...notes){ element[key_reactive]= []; on.disconnected(()=> /*! - * Clears all Observables listeners added in the current scope/host (`S.el`, `assign`, …?). + * Clears all Observables listeners added in the current scope/host (`O.el`, `assign`, …?). * You can investigate the `__dde_reactive` key of the element. * */ element[key_reactive].forEach(([ [ o, listener ] ])=>