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Type:
Bug
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: bson-4.0.4
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Component/s: js-bson
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None
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I first created this as an issue on the public GitHub repository: https://github.com/mongodb/js-bson/issues/371.
I believe the bson package's esm bundles are suffering from a bug originating in the rollup-plugin-commonjs dependency (now @rollup/plugin-commonjs - I verified that the bug is still present if upgrading to the latest version of this new package).
I believe the root cause is that describe in the "External imports in the CommonJS plugin" sub-section of this issue on the Rollup.js repository:
*� Bug 5:* For external imports, this plugin will always require the default import.
Because of this, when "long" and "buffer" is imported via `require("long")` and `require("buffer")` in the various sourcefiles and gets translated to `import long from "long"` and `import buffer from "buffer"` by the commonjs plugin, it produces an invalid bundle, since "buffer" does provide a `default` export.
This results in a downstream issue when trying to bundle this package into my own IIFE bundle, using Rollup.
I've attached is some code to reproduce the issue that I'm seeing.
Output from running `npx rollup -c`
> rollup -cmain.js → bundle.js... [!] Error: 'default' is not exported by node_modules/long/src/long.js, imported by node_modules/bson/dist/bson.esm.js https://rollupjs.org/guide/en/#error-name-is-not-exported-by-module node_modules/bson/dist/bson.esm.js (1:7) 1: import long from 'long'; ^ 2: import buffer from 'buffer'; Error: 'default' is not exported by node_modules/long/src/long.js, imported by node_modules/bson/dist/bson.esm.js at error (/Users/kraenhansen/Projects/bson-bug/node_modules/rollup/dist/shared/rollup.js:5171:30) at Module.error (/Users/kraenhansen/Projects/bson-bug/node_modules/rollup/dist/shared/rollup.js:9603:16) at handleMissingExport (/Users/kraenhansen/Projects/bson-bug/node_modules/rollup/dist/shared/rollup.js:9525:28) at Module.traceVariable (/Users/kraenhansen/Projects/bson-bug/node_modules/rollup/dist/shared/rollup.js:9986:24) at ModuleScope.findVariable (/Users/kraenhansen/Projects/bson-bug/node_modules/rollup/dist/shared/rollup.js:8549:39) at MemberExpression.bind (/Users/kraenhansen/Projects/bson-bug/node_modules/rollup/dist/shared/rollup.js:6324:49) at AssignmentExpression.bind (/Users/kraenhansen/Projects/bson-bug/node_modules/rollup/dist/shared/rollup.js:2880:23) at ExpressionStatement$1.bind (/Users/kraenhansen/Projects/bson-bug/node_modules/rollup/dist/shared/rollup.js:2880:23) at Program$1.bind (/Users/kraenhansen/Projects/bson-bug/node_modules/rollup/dist/shared/rollup.js:2876:31) at Module.bindReferences (/Users/kraenhansen/Projects/bson-bug/node_modules/rollup/dist/shared/rollup.js:9599:18)
