test2.ts

import { Evt, Ctx } from "../lib/index.ts";

type T = string;

let evt = new Evt<T>();

//evt.enableTrace("evt");

let evtProxy = new Evt<T>();

//evtProxy.enableTrace("evtProxy");

{

    const map = new Map<string, Ctx<void>>();

    evt.attach(data => {

        if (!map.has(data)) {
            map.set(data, Evt.newCtx());
        }

        if (!evtProxy.evtAttach.postCount) {
            evtProxy.evtAttach.attachOnce(map.get(data)!, () => evtProxy.post(data));
        } else {
            evtProxy.post(data);
        }

    });

}

for (let char of ["a", "b", "c", "d", "e"])
    evt.post(char);

let alphabet = "";

evtProxy.attach(data => {

    alphabet += data;

});


for (let char of ["f", "g", "h"])
    evt.post(char);

//cSpell: disable
console.assert(alphabet === "abcdefgh");
//cSpell: enable

console.log("PASS");