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🚀 lifecycle events, signals from attrs test

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This commit is contained in:
Jan Andrle
2023-10-13 16:37:04 +02:00
parent b9bbd105a5
commit 18f93d7e0b
8 changed files with 745 additions and 651 deletions
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22
src/signals-lib.js
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@ -37,6 +37,22 @@ S.symbols= {
signal: mark,
onclear: Symbol.for("Signal.onclear")
};
import { on } from "./events.js";
import { scope } from "./dom.js";
S.attribute= function(name, initial= undefined){
const { host }= scope;
const value= host() && host().hasAttribute(name) ? host().getAttribute(name) : initial;
const ac= new AbortController();
const out= S(value, {
[S.symbols.onclear](){ ac.abort(); }
});
scope.host(on.attributeChanged(function({ detail }){
const [ name_c, value ]= detail;
if(name_c!==name) return;
out(value);
}, { signal: ac.signal }));
return out;
};
S.clear= function(...signals){
for(const signal of signals){
Reflect.deleteProperty(signal, "toJSON");
@ -95,7 +111,7 @@ export const signals_config= {
function create(value, actions){
const signal= (...value)=>
value.length ? write(signal, value[0]) : read(signal);
value.length ? write(signal, ...value) : read(signal);
return toSignal(signal, value, actions);
}
const protoSigal= Object.assign(Object.create(null), {
@ -138,10 +154,10 @@ function read(signal){
if(deps.has(context)) deps.get(context).add(signal);
return value;
}
function write(signal, value){
function write(signal, value, force){
if(!signal[mark]) return;
const s= signal[mark];
if(s.value===value) return;
if(!force && s.value===value) return;
s.value= value;
s.listeners.forEach(l=> l(value));
return value;