Reproduction

Vite v0.20.2 CJS import issue

Setup

• Clone the repo
• Install the dependencies

npm install

• Run the tests

npm run test

Running the test should throw the following error

SyntaxError: Named export 'AttributeAction' not found. The requested module 'css-what' is a CommonJS module, which may not support all module.exports as named exports.
CommonJS modules can always be imported via the default export, for example using:

import pkg from 'css-what';
const { AttributeAction, SelectorType } = pkg;

Working version

• Switch to vitest-v19 branch

git fetch
git checkout vitest-v19

• Install deps and run the test