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deka-dom-el/docs_src/components/examples/scopes/declarative.js

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2023-12-04 18:19:30 +01:00
/* PSEUDO-CODE!!! */
import { el } from "deka-dom-el";
import { O } from "deka-dom-el/observables";
function component(){
/* prepare changeable data */
const dataA= O("data");
const dataB= O("data");
/* define data flow (can be asynchronous) */
fetchAPI().then(data_new=> dataA(data_new));
setTimeout(()=> dataB("DATA"));
/* declarative UI */
return el().append(
el("h1", {
textContent: "Example",
/* declarative attribute(s) */
classList: { declarative: dataB }
}),
el("ul").append(
/* declarative element(s) */
O.el(dataA, data=> data.map(d=> el("li", d)))
),
el("ul").append(
/* declarative component(s) */
O.el(dataA, data=> data.map(d=> el(subcomponent, d)))
)
);
}
function subcomponent({ id }){
/* prepare changeable data */
const textContent= O("…");
/* define data flow (can be asynchronous) */
fetchAPI(id).then(text=> textContent(text));
/* declarative UI */
return el("li", { textContent, dataId: id });
}