Description

The optimizer is not stable enough at this point (some packages like react don't work with it and if all dependencies are not pre-bundled, there is a high chance users will get a "Cannot find module" error only in CI which is hard to debug). Since Vitest 1.3.0 focuses more on stability, we are disabling this option until we can figure out a good way to enable it without these hazards. If your tests are slower after this PR, you can always enable optimizer manually:

export default defineConfig({
  test: {
    deps: {
      optimizer: {
        web: {
           enabled: true,
        },
        ssr: {
          enabled: true,
        }
      }
    }
  }
})

Please don't delete this checklist! Before submitting the PR, please make sure you do the following:

• It's really useful if your PR references an issue where it is discussed ahead of time. If the feature is substantial or introduces breaking changes without a discussion, PR might be closed.
• Ideally, include a test that fails without this PR but passes with it.
• Please, don't make changes to pnpm-lock.yaml unless you introduce a new test example.

Tests

• Run the tests with pnpm test:ci.

Documentation

• If you introduce new functionality, document it. You can run documentation with pnpm run docs command.

Changesets

• Changes in changelog are generated from PR name. Please, make sure that it explains your changes in an understandable manner. Please, prefix changeset messages with feat:, fix:, perf:, docs:, or chore:.