Optional
items: null | Iterable<TValue>import { derive } from "value-enhancer";
import { reactiveList } from "value-enhancer/collections";
const list = reactiveList(["a", "b", "c"]);
const item$ = derive(list.$, list => list.get(2)); // watch the item at index 2
console.log(item$.value); // "c"
list.set(2, "d");
console.log(item$.value); // "d"
Create a new ReactiveList.