Production build generates the exported default as the module itself

Describe the bug

When importing the package react-mapbox-wrapper, it behaves differently when used in development and production.

Given the following code:

import * as M from "react-mapbox-wrapper";
console.log(`M`, M);

running vite outputs:

running vite build && vite preview outputs:

Reproduction

1. clone https://github.com/Newbie012/vite-bug-1
2. npm install
3. npm run dev
4. see that the console.log that mentioned above exports accordingly
5. npm run build
6. npm run preview
7. see that the console.log logs a module which its default module is itself

System Info

System:
    OS: Linux 4.19 Ubuntu 20.04.1 LTS (Focal Fossa)
    CPU: (16) x64 AMD Ryzen 7 5800X 8-Core Processor
    Memory: 14.32 GB / 24.99 GB
    Container: Yes
    Shell: 5.8 - /usr/bin/zsh
  Binaries:
    Node: 12.22.6 - ~/.nvm/versions/node/v12.22.6/bin/node
    npm: 6.14.15 - ~/.nvm/versions/node/v12.22.6/bin/npm
  npmPackages:
    @vitejs/plugin-legacy: 1.6.4 => 1.6.4 
    @vitejs/plugin-react: 1.1.3 => 1.1.3 
    vite: 2.7.2 => 2.7.2

Used Package Manager

npm

Logs

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn’t already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it’s a Vue SFC related bug, it should likely be reported to https://github.com/vuejs/vue-next instead.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[Newbie012]

Closing in favor of vite v3 which doesn’t use @rollup/plugin-commonjs

[Newbie012]

Decided to still open it since I believe it’s still a bug