This is a really great tool, ❤ it! I think the URL https://sandworm.dev/npm/package/foobar is really awesome too, and well implement. Bravo 👏👏

I've had requests to see my sw.js file, so here is a link to it in production: https://wheely.today/sw.js

Some good SW references to get started: https://web.dev/offline-cookbook/#generic-fallback https://web.dev/offline-cookbook/#stale-while-revalidate

New and exciting updates with package.json and NodeJS API compatibility: https://deno.com/blog/v1.31

Bonus tip: how to turn your POO (plain old object) into an iteratable array! const obj1 = {a: 1, b: 2}; obj1.__proto__[Symbol.iterator] = function* () { for (const k in this) yield [k, this[k]]; } for (const e of obj1) console.log(e.join(":")) // a:1 // b:2

Here are more examples of what you can do with generator functions--efficient number ranges, and how to convert generators into arrays: https://gist.github.com/crazy4groovy/4d871aadad1d71754a863e92f119c489

For an IFace1 object, if you call Object.keys() on it, it will always return an array with "NotOptional" it it. Not so with IFace2. Like you said, in practical terms that's mostly useful for memory allocation. But sometimes there can also be subtle implications as well; kinda like the difference between null and undefined.

One of my favourite util functions using Array.from: const listRange = (begin, end, inc = 1) => Array.from({ length: Math.ceil((end - begin) / inc) }, (_, i) => begin + i * inc); // console.log(listRange(0, 4, 1)); // [0, 1, 2, 3] // console.log(listRange(0, 4)); // [0, 1, 2, 3] // console.log(listRange(1, 10, 2)); // [1, 3, 5, 7, 9]

Very honest and perceptive! I too have had similar thoughts on the topic. This is well articulated. Thanks for sharing.

I just learned that there's an npm lib that implements this as well (if you wanna be lazy like the tree raccoon in that image lol): https://www.npmjs.com/package/cachified Very hot topic!