jaandrle/deka-dom-el
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Pre dev-memo (#17)

Browse Source 
* 🎉

* ➖ no good direction

how to clean up not used in text re-rendering ⇒ needs to be more inside of `O.el`

* 🐛 🔨 `O.el`

* 🚀 implementing #16

* 💥 `on.(dis)connected` only once
This commit is contained in:
Jan Andrle
2024-01-31 14:37:19 +01:00
committed by GitHub
parent 13c75fede1
commit c1a38e566c
15 changed files with 152 additions and 99 deletions
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23
src/customElement.js
View File

@ -1,3 +1,4 @@
import { keyLTE } from "./dom-common.js";
import { scope } from "./dom.js";
export function customElementRender(custom_element, render, props= observedAttributes){
scope.push({
@ -11,20 +12,24 @@ export function customElementRender(custom_element, render, props= observedAttri
return out;
}
export function lifecycleToEvents(class_declaration){
for (const name of [ "connected", "disconnected" ])
wrapMethod(class_declaration.prototype, name+"Callback", function(target, thisArg, detail){
target.apply(thisArg, detail);
thisArg.dispatchEvent(new Event("dde:"+name));
});
const name= "attributeChanged";
wrapMethod(class_declaration.prototype, name+"Callback", function(target, thisArg, detail){
wrapMethod(class_declaration.prototype, "connectedCallback", function(target, thisArg, detail){
target.apply(thisArg, detail);
thisArg.dispatchEvent(new Event("dde:connected"));
});
wrapMethod(class_declaration.prototype, "disconnectedCallback", function(target, thisArg, detail){
target.apply(thisArg, detail);
(queueMicrotask || setTimeout)(
()=> !thisArg.isConnected && thisArg.dispatchEvent(new Event("dde:disconnected"))
);
});
wrapMethod(class_declaration.prototype, "attributeChangedCallback", function(target, thisArg, detail){
const [ attribute, , value ]= detail;
thisArg.dispatchEvent(new CustomEvent("dde:"+name, {
thisArg.dispatchEvent(new CustomEvent("dde:attributeChanged", {
detail: [ attribute, value ]
}));
target.apply(thisArg, detail);
});
class_declaration.prototype.__dde_lifecycleToEvents= true;
class_declaration.prototype[keyLTE]= true;
return class_declaration;
}
export { lifecycleToEvents as customElementWithDDE };

1
src/dom-common.js
View File

@ -26,3 +26,4 @@ function setDeleteAttr(obj, prop, val){
if(Reflect.get(obj, prop)==="undefined")
return Reflect.set(obj, prop, "");
}
export const keyLTE= "__dde_lifecycleToEvents"; //boolean

29
src/events.js
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@ -1,5 +1,5 @@
export { registerReactivity } from './observables-common.js';
import { enviroment as env } from './dom-common.js';
import { enviroment as env, keyLTE } from './dom-common.js';
export function dispatchEvent(name, options, host){
if(!options) options= {};
@ -26,6 +26,7 @@ const els_attribute_store= new WeakSet();
import { scope } from "./dom.js";
import { onAbort } from './helpers.js';
//TODO: cleanUp when event before abort?
//TODO: docs (e.g.) https://nolanlawson.com/2024/01/13/web-component-gotcha-constructor-vs-connectedcallback/
on.connected= function(listener, options){
const { custom_element }= scope.current;
const name= "connected";
@ -36,7 +37,7 @@ on.connected= function(listener, options){
if(custom_element) element= custom_element;
const event= "dde:"+name;
element.addEventListener(event, listener, options);
if(element.__dde_lifecycleToEvents) return element;
if(element[keyLTE]) return element;
if(element.isConnected) return ( element.dispatchEvent(new Event(event)), element );
const c= onAbort(options.signal, ()=> c_ch_o.offConnected(element, listener));
@ -54,7 +55,7 @@ on.disconnected= function(listener, options){
if(custom_element) element= custom_element;
const event= "dde:"+name;
element.addEventListener(event, listener, options);
if(element.__dde_lifecycleToEvents) return element;
if(element[keyLTE]) return element;
const c= onAbort(options.signal, ()=> c_ch_o.offDisconnected(element, listener));
if(c) c_ch_o.onDisconnected(element, listener);
@ -77,7 +78,7 @@ on.attributeChanged= function(listener, options){
return function registerElement(element){
const event= "dde:"+name;
element.addEventListener(event, listener, options);
if(element.__dde_lifecycleToEvents || els_attribute_store.has(element))
if(element[keyLTE] || els_attribute_store.has(element))
return element;
if(!env.M) return element;
@ -171,13 +172,13 @@ function connectionsChangesObserverConstructor(){
function requestIdle(){ return new Promise(function(resolve){
(requestIdleCallback || requestAnimationFrame)(resolve);
}); }
async function collectChildren(element, filter){
async function collectChildren(element){
if(store.size > 30)//TODO limit?
await requestIdle();
const out= [];
if(!(element instanceof Node)) return out;
for(const el of store.keys()){
if(el===element || !(el instanceof Node) || filter(el)) continue;
if(el===element || !(el instanceof Node)) continue;
if(element.contains(el))
out.push(el);
}
@ -186,7 +187,7 @@ function connectionsChangesObserverConstructor(){
function observerAdded(addedNodes, is_root){
let out= false;
for(const element of addedNodes){
if(is_root) collectChildren(element, el=> !el.isConnectedd).then(observerAdded);
if(is_root) collectChildren(element).then(observerAdded);
if(!store.has(element)) continue;
const ls= store.get(element);
@ -203,17 +204,21 @@ function connectionsChangesObserverConstructor(){
function observerRemoved(removedNodes, is_root){
let out= false;
for(const element of removedNodes){
if(is_root) collectChildren(element, el=> el.isConnectedd).then(observerRemoved);
if(is_root) collectChildren(element).then(observerRemoved);
if(!store.has(element)) continue;
const ls= store.get(element);
if(!ls.length_d) continue;
element.dispatchEvent(new Event("dde:disconnected"));
store.delete(element);
(queueMicrotask || setTimeout)(dispatchRemove(element));
out= true;
}
return out;
}
function dispatchRemove(element){
return ()=> {
if(element.isConnected) return;
element.dispatchEvent(new Event("dde:disconnected"));
store.delete(element);
};
}
}

17
src/observables-lib.js
View File

@ -96,7 +96,7 @@ observable.el= function(o, map){
out.append(mark_start, mark_end);
const { current }= scope;
const reRenderReactiveElement= v=> {
if(!mark_start.parentNode || !mark_end.parentNode)
if(!mark_start.parentNode || !mark_end.parentNode) // isConnected or wasn’t yet rendered
return removeObservableListener(o, reRenderReactiveElement);
scope.push(current);
let els= map(v);
@ -107,12 +107,21 @@ observable.el= function(o, map){
while(( el_r= mark_start.nextSibling ) !== mark_end)
el_r.remove();
mark_start.after(...els);
if(mark_start.isConnected)
requestCleanUpReactives(current.host());
};
addObservableListener(o, reRenderReactiveElement);
removeObservablesFromElements(o, reRenderReactiveElement, mark_start, map);
reRenderReactiveElement(o());
return out;
};
function requestCleanUpReactives(host){
if(!host || !host[key_reactive]) return;
(requestIdleCallback || setTimeout)(function(){
host[key_reactive]= host[key_reactive]
.filter(([ o, el ])=> el.isConnected ? true : (removeObservableListener(...o), false));
});
}
import { on } from "./events.js";
import { observedAttributes } from "./helpers.js";
const observedAttributeActions= {
@ -152,7 +161,11 @@ export const observables_config= {
isObservable,
processReactiveAttribute(element, key, attrs, set){
if(!isObservable(attrs)) return attrs;
const l= attr=> set(key, attr);
const l= attr=> {
if(!element.isConnected)
return removeObservableListener(attrs, l);
set(key, attr);
};
addObservableListener(attrs, l);
removeObservablesFromElements(attrs, l, element, key);
return attrs();