Link to the code that reproduces this issue

https://github.com/alan-ws/type-attribute-not-omitted-when-types-key-is-empty-string

To Reproduce

1. clone repo
2. start app in local
3. open chrome dev tools
4. review elements in head
5. note that tag with rel="alternate" has an empty type

Current vs. Expected behavior

CURRENT: tag with rel="alternate" has an empty type
EXPECTED: tag with rel="alternate" contains all props but the empty type is omitted

Provide environment information

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 24.6.0: Mon Jul 14 11:30:29 PDT 2025; root:xnu-11417.140.69~1/RELEASE_ARM64_T6000
Binaries:
  Node: 23.10.0
  npm: 10.9.2
  Yarn: N/A
  pnpm: 9.11.0
Relevant Packages:
  next: 13.5.4
  eslint-config-next: N/A
  react: 18.2.0
  react-dom: 18.2.0
  typescript: 4.9.5
Next.js Config:
  output: N/A

Which area(s) are affected? (Select all that apply)

Metadata

Which stage(s) are affected? (Select all that apply)

next dev (local), Vercel (Deployed)

Additional context

No response