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!