Version

3.2.26

Reproduction link

stackblitz.com

Steps to reproduce

1. Import module with asterisk, import * as tree from './tree-shaking2'
2. Use imported var in template {{ tree.used2() }}
3. Build with vite build
4. Checkout output files

What is expected?

Only tree.used2() will be found in bundle

What is actually happening?

All exports from 'tree-shaking2.ts', even those not used, like tree.notUsed2() will be present in bundle.

Dig in sfc compiler.

Possible cause:

• Compiler detects tree as maybeRef, hitting the unref logic.
• tree.used2() turns into unref(tree).used2().
• The unref() call breaks tree shaking.