Bug? 'createClass' is not a function in snowpack

[martaver]

Link to Reproduce: https://github.com/cleric-sh/repro/tree/snowpack-react-sortable-tree
Affected Version: v1.7.1

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I recently added a resolution to my repro to use @rollup/[email protected] which would resolve issues with mixed exports. It resolved the previous issue: https://www.pika.dev/npm/snowpack/discuss/421 but revealed a new issue:

Uncaught TypeError: createClass is not a function
    at react-sortable-tree.js:2556

I detail the error in my response here: https://www.pika.dev/npm/snowpack/discuss/476 and my repro (attached).

[martaver]

Is this a bug in snowpack, or am I missing some configuration?

[FredKSchott]

Thanks for moving the discussion here, and thanks for the help debugging issues. That's very strange, what version of react-virtualized are you using? v9 uses _createClass which doesn't match that error log (see: https://unpkg.com/browse/[email protected]/dist/es/Grid/utils/CellSizeAndPositionManager.js) but then v10 (still in alpha) uses createClass which is bundled in with the package code.