Attempted import error: 'rbush' does not contain a default export (imported as 'RBush').

[DoHung1997]

./node_modules/@cesium/engine/Source/Core/RectangleCollisionChecker.js
Attempted import error: 'rbush' does not contain a default export (imported as 'RBush').

I have a problem when building cesium with nextjs. When I run "yarn build", it show this error

[ggetz]

@jjspace Can you please take a look at this?

[jjspace]

rbush is a dependency of engine. In the 1.120 update we updated this to v4.0.0 but that version switched to only support ES modules and dropped CommonJS. We publish CesiumJS to be used in both ESM and CommonJS projects. I think this just means that in your project it's trying to build as CommonJS and failing on that package.
I think that short term we have to lock that package to 3.0.1 and longer term maybe investigate replacing it. Thoughts @ggetz

[ggetz]

@jjspace I agree. Let's move ahead with the locked version.

How would you like to document the locked version? Maybe leave this issue open?

[jjspace]

@DoHung1997 Short term you should be able to override the version of rbush in your package.json to avoid the build error (See this SO question). This will be pinned in the next release so you will be able to remove the override.

{
  "dependencies": {...},
  "devDependencies": {...},
  "overrides": {
    "@cesium/engine": {
      "rbush": "3.0.1"
    }
  }
}

How would you like to document the locked version? Maybe leave this issue open?

@ggetz That's fine, we can just leave this issue open and maybe rename it to match the other dependencies issues or make a new one (Edit, created #12203). I really wish we could add comments to package.json but that's apparently a discussion that's been shut down before so no luck there.

Down the rabbit hole

Just a collection of links I previously collected tumbling down the rabbit hole of finding out whether npm would support .jsonc or another alternative. Seems the answer is sadly a resounding "no" currently.

• [FEATURE] Allow jsonc or JSON5 for package.json for commenting · Issue #793 · npm/cli · GitHub
• [RRFC] Allow jsonc or JSON5 for package.json for commenting · Issue #424 · npm/rfcs · GitHub
• [RRFC] Opt-in solution to support comments in package.json (among other features) · Issue #291 · npm/rfcs · GitHub
• Use JSON5 for package.json · npm/feedback · Discussion #56 · GitHub
• Support for comments in package.json · Issue #4482 · npm/npm · GitHub

[DoHung1997]

Greate! it worked correctly. Thanks!