@pexip/signal/dist/logger.js

an observer pattern while avoiding boilerplate code. https://en.wikipedia.org/wiki/Signals_and_slots

import { createConsoleLogger } from './baseLogger';
export let logger = createConsoleLogger();
export function setLogger(newLogger) {
    logger = newLogger;
}
export const flags = {};
export function setFlags(newFlags) {
    Object.assign(flags, newFlags);
}