axax/esnext/fromEvent.js

A library of async iterator extensions for JavaScript including ```map```, ```reduce```, ```filter```, ```flatMap```, ```pipe``` and [more](https://github.com/jamiemccrindle/axax/blob/master/docs/API.md#functions).

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const subject_1 = require("./subject");
function fromEvent(source, type) {
    const subject = new subject_1.Subject();
    const callback = (event) => {
        subject.onNext(event);
    };
    source.addEventListener(type, callback);
    subject.finally(() => source.removeEventListener(type, callback));
    return subject.iterator;
}
exports.fromEvent = fromEvent;