According to Skypack docs, simple urls produce development builds. To use a minified production one, you'd need to import a pinned URL, which is listed in the comments when you read https://cdn.skypack.dev/d3@5 — e.g. https://cdn.skypack.dev/pin/d3@v5.16.0-Ce21vy8OWLss73eB7sms/min/d3.js

aha! I was wondering what those URLs were for, other than explicit version pinning.

hm, according to the docs https://cdn.skypack.dev/d3@5/minify should work too, but there seems to be a bug following through at https://cdn.skypack.dev/-/d3@v5.16.0-Ce21vy8OWLss73eB7sms/dist=es2020,mode=raw/minify

aha, new API is ?min, so https://cdn.skypack.dev/d3@5?min is productionized.

This is minified explicitly by D3: https://github.com/d3/d3/blob/7244e45e68af39c519f76667a03039d5b24dd453/package.json#L20

👍

This is an interesting one! It looks like @ungap/weakmap has an incorrectly formatted "exports" map in its package.json: ``` "exports": { "import": "./esm/index.js", "default": "./cjs/index.js" } ``` Should be: ``` "exports": { ".": { "import": "./esm/index.js", "default": "./cjs/index.js" } } ``` Same goes for all the other @ungap packages. I wonder if we should just ignore an exports map if we detect that it's broken or incorrectly formatted.

Yup, that works. If an entry in the "exports" map is invalid, we now ignore it instead of failing the entire build. HyperHTML looks good to go

Wowow! 💯

By the way, jsdelivr.com have launched their own service for ESM bundling (still beta, though): https://www.jsdelivr.com/esm

Thank you so much for this notebook! You've opened my eyes to a new world of opportunities here. And having other sites like jsdelivr as well is cool Fabian.

@mootari yes! I've been meaning to dig into that one too...

Another one for the list: https://jspm.org/

One more for the pile: https://github.com/ije/esm.sh