node-v0.x-archive VS import-maps

On 16 February 2009, a GitHub commit was made. By a person who would later turn out to be the creator of two of the most successful, impactful, and standard tech platforms the world has ever seen. Who is he? Let's explore.

Based on several issues in the Node repository (nodejs/node-v0.x-archive#7729, nodejs/node-v0.x-archive#5488, nodejs/node#5436) this error can occur when a DNS server fail to respond, perhaps due to it rate-limiting requests. Reducing DNS lookups can reduce or eliminate these errors.

I don't know how node is processing the stream and buffering or not buffering. I just invested the past few hours into researching Node.js buffering and not buffering read(). There are more than one issue regarding the subject-matter, e.g., https://github.com/nodejs/node/issues/2972, https://github.com/nodejs/node-v0.x-archive/issues/4000, https://github.com/nodejs/node/issues/6379. From what I gather Node.js blames the process itself. However, I run the same algorithm using Python, C++, C, QuickJS JavaScript engine where the RSS does not exponentially increase during usage.

setTimeout implementation: https://github.com/nodejs/node-v0.x-archive/blob/master/lib/timers.js

...or something similar to that. I mean, it's pretty close to that. You can see for yourself if you want. These lines there are exactly what they do: They set thisValueto point to module.exports and then they execute your file/module with that as the value of this. (Only they have some additional helper stuff like ReflectApply because there are some additional complexities now with modules. In the older versions of the code you could see the apply call directly there.

I was referring to node <0.1.30[1] which did have promises for a while. largely from jQuery deferred, which were ungood in a couple ways I don't remember. but also remarkably similar.

I still largely think kris kowal building the "Q" promise library is what made promises interesting, what surfaced the idea that we might want to first-class our completeablea/futures. I know kris had some specific inspirations but I forget what.

pains me somewhat to this day that promises ultimately became somewhat un-value like, that handlers don't get to see what it was resolving. all the chain/spawn discussion, the functional promise folk: they got rolled by those insisting we had to target only the lowest rings of the developership, and that allowing more potent systems was unacceptable. wish I could find those es-discusa threads, for the powerful sorrow of the afteath, what we are stuck with, in it's so lites form, haunts me. especially as we double back a decade latter & invent controllers & signals toanage our promises. which we would have had for free.

way off topic now. forgive me my late night ramblings.

[1] https://github.com/nodejs/node-v0.x-archive/blob/v0.1.30/Cha...

Long time huge fan of JS. I appreciate your calling out the multi-paradigm aspect; having these first class functions & prototype based inheritance has been so flexible.

TC39 has done a great job shaping the language over the years. New capabilities are usually well thought out & integrate well. Async await has been amazing.

The one major miss that makes me so sad and frustrated is modules; js has gotten better everywhere except it's near requirement for build tooling. Being able to throw some scripts on a page and go is still an unparalleled experience in the world, is so direct & tactile an experience. EcmaScript Modules was supposed to improve things, help get us back, but imports using url specifiers made the whole thing non-modular, was a miss. We're still tangled & torn. Import-maps has finally fixed but it's no where near as straightforward, and it still doesn't work in workers, which leaves us infuriatingly shirt of where the past was. https://github.com/WICG/import-maps/issues/2

makes sure your app is getting the download it expects. Adoption is probably pretty minimal though. https://developer.mozilla.org/en-US/docs/Web/Security/Subres...

I think the big thing making this unlikely though is that very few folks use cdns these days. We designed ESM as a module system for the language, but then took a good fraction of a decade to build import-maps, to let us actually use modules in a modular way. Good news, we can finally use modules modularly! https://caniuse.com/import-maps

Bad news? Oh import-maps only works for the simplest case. Doesn't work in webworkers/service workers. https://github.com/WICG/import-maps/issues/2

The point is that single page apps almost always are bundled together, as using CDNs hasn't even been technically possible.

Also, CDNs are kind of somewhat pointless, now that http caches are partitioned by origin (for security reasons). They might have better anycast infrastructure to get the content out faster, but without the caching there's no inherent advantage. The user will download the same jquery file again in each site they go to, no already having it cached anymore. Bah humbug!

https://github.com/WICG/import-maps/issues/2

Bare specifiers has been the tragedy of ESM. Nice module syntax... that is utterly u deoyable & which has had to have awful de-modularizing specifiers hard-coded into each file to make it work. Abominable sin to introduce "modules" to JS/es2015 then spend a decade dragging everyone along with no story for how to have modular modules.

Import-maps are like "here" to fix this on the web... finally... except they only are shipping to the happiest sunniest easiest case, with Web Workers being totally shit out of luck in spite of some very simple straightforward suggested paths forward. https://github.com/WICG/import-maps/issues/2

I think Deno is making pretty good tradeoffs along the way here. This looks like package.json at surface level, but there is a nightmare of complexity under the surface. Typescript, ESM, cjs all have various pressures they create & in Node it's just incredibly tight & tense dealing with packaging, where-as Deno's happy path of Typescript first does not slowly tatters one over time. It really has been super pleasant being free of the previous world, and having something much more web-platform centric, more intented, with less assembly & less building, and more doing the actual coding.

I really hope import-maps eventually get broader support. Maybe this long-dwelling webworker issue should be brought up with WinterCG.

Import maps proposal

The concept of Import Maps was born in 2018 and made its long way until it was declared a new web standard implemented by Chrome in 2021 and some other browsers.

For package managers, you can use something like import maps to let the user specify which path points to what package, and resolve it properly.

Huh. I was about to complain that this breaks with web standards, but apparently it's being proposed as a standard feature: https://github.com/WICG/import-maps

Interesting!