ireade

self.addEventListener('install', (e) => {
    e.waitUntil(
        caches.open("precache").then((cache) => cache.add("/broken.png"))
    );
});

function isImage(fetchRequest) {
    return fetchRequest.method === "GET" && fetchRequest.destination === "image";
}

boneskull

Here's an example of how to debug Mocha v4 if it hangs.

Ensure you're using a Node.js 8 or newer (or any version with async_hooks support).

If you run your test, you'll notice it hangs:

$ mocha test.js

mariocesar

import axios from "axios";

const singleton = Symbol();
const singletonEnforcer = Symbol();

function readCookie(name) {
    const match = document.cookie.match(new RegExp('(^|;\\s*)(' + name + ')=([^;]*)'));
    return (match ? decodeURIComponent(match[3]) : null);
}