https://github.com/dario-piotrowicz/cjs-module-lexer-reexports-repro

https://github.com/dario-piotrowicz/cjs-module-lexer-reexports-repro

Last synced: 8 days ago
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• Host: GitHub
• URL: https://github.com/dario-piotrowicz/cjs-module-lexer-reexports-repro
• Owner: dario-piotrowicz
• Created: 2024-08-07T22:45:03.000Z (3 months ago)
• Default Branch: main
• Last Pushed: 2024-08-07T23:25:02.000Z (3 months ago)
• Last Synced: 2024-08-08T02:14:32.244Z (3 months ago)
• Language: JavaScript
• Size: 1000 Bytes
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# cjs-module-lexer-reexports-repro

This repo simply shows the fact that `cjs-module-lexer` can produce unhelpful reexport results.

Specifically, the lexer [resets the reexport set](https://github.com/nodejs/node/blob/2bcf9995d28758584f34382bc402995f268d1b64/deps/cjs-module-lexer/lexer.js#L913) causing only the last instance of `module.exports = require(...)` to be considered.

For example parsing the below code:

```js

if (true) {

  module.exports = require("./a.cjs");

} else {

  module.exports = require("./b.cjs");

}

```

yields `{ exports: [], reexports: [ './b.cjs' ] }`, completely loosing the information that the module is also trying to re-export from `'./a.cjs'`

## Reproduction steps

```

npm i

```

```

npm start

```