Move server-side storage backends into separate package

[jwindhager]

Currently, loading @zarrita/storage from CDNs fails, because server-side node.js components (specifically, node:fs required by FileSystemStore) cannot be bundled. This can also be annoying when developing static web pages and bundling locally. It would be nice if there would be separate packages for server-side and browser environments.

[keller-mark]

Duplicate of #205

[jwindhager]

Apologies, somehow missed that!

Ok, I'll close for now but feel free to reopen if you find that doesn't work for a future use case!

Originally posted by @manzt in #205

Unfortunately, I cannot re-open the other issue (future use case: using CDNs), so leaving this one open for now.

[keller-mark]

esm.sh does allow to specify package exports directly:

• https://esm.sh/@zarrita/storage/fetch
• https://esm.sh/@zarrita/storage/zip

However unpkg does not seem to have the same functionality. I am not sure about other CDNs, i suppose they all have slightly different behavior

[keller-mark]

@xinaesthete does this resolve the issue in your blog post? https://taylor-ccb-group.github.io/SpatialData.js/blog/build_glitch

import ZipFileStore from '@zarrita/storage/zip';

Specifically, changing your import statement to point directly to the export entry

zarrita.js/packages/@zarrita-storage/package.json

Line 28 in 23abb3b

"./zip": {

[xinaesthete]

@keller-mark I don't think so... in this spatialdata.js commit I'd added it imported as you describe (with code copied from vitessce) - and I certainly thought it was ok at the time or I wouldn't have committed - but then some time later I realised there was actually a build error related to this again so I removed it.

I would definitely like it if we could support that, so please let me know if there's something I've missed or anything different I should try.

[xinaesthete]

Having said that... I need to look into this more carefully; it seems like just adding that import is not sufficient to break the build, so I must have messed something else up at some point.