npm ERR! code ERESOLVE occurs on npm install

[MasaruKitajima]

My node version is v20.12.2 and npm version is 10.5.2

When I ran npm install, I got error as followings.

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: [email protected]
npm ERR! Found: [email protected]
npm ERR! node_modules/rollup
npm ERR!   dev rollup@"^4.18.0" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer rollup@"^2.0.0" from [email protected]
npm ERR! node_modules/rollup-plugin-terser
npm ERR!   dev rollup-plugin-terser@"^7.0.2" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.

How can I fix these erros?

[gka]

I think the imports will be fixed once #336 is merged

[MasaruKitajima]

Thank you so much. I'll try it later and will report.

[gka]

Should be fixed in 2.5.0 now, just tested it with Node v20.11.1

[clhenrick]

@gka not sure if it relates to this issue but I'm seeing "invalid module" when require'ing chroma-js on ObservableHQ. This was working fine yesterday. I see a dependabot PR was recently merged 2 hours ago, perhaps that broke something?

Example notebook: https://observablehq.com/d/7a7e8b4d8fda8036

[gka]

@clhenrick hm, I think that's a problem with how ObservableHQ is importing npm modules when using its require method. Confusingly, this is not the Node require method but rather an alias for d3-require, which doesn't seem to support the way chroma-js is bundled since 2.5.0.

However, you can import chroma.js using the newer import syntax (found this using the handy module require debugger notebook)

// works only in Observable Notebooks
chroma = (await import("https://unpkg.com/chroma-js")).default

Here's a demo notebook: https://observablehq.com/@gka/chroma-js

Btw, you can also import chroma from this notebook directly

// works only in Observable Notebooks
import {chroma} from "@gka/chroma-js"

Btw, importing chroma.js works fine in other places, e.g., this Svelte REPL.

[gka]

@MasaruKitajima I tested importing chroma.js via npm both using require and import and it works fine, so I'll close this issue now. Thanks for reporting the bug.

[MasaruKitajima]

@gka Thank you for your efforts.
I could build it successfully.
Again, many thanks for your great efforts.