Add support for `defaultTitle` when title is not provided

[ItaiYosephi]

Describe the feature

would like to suggest adding support for a ⁠defaultTitle feature. This feature would function similarly to the ⁠defaultTitle prop in React Helmet, serving as the title when no specific ⁠<title> is provided. This would help avoid unusual titles such as ⁠ - MyApp when using the ⁠titleTemplate.

Use Case:

• Set a ⁠defaultTitle that is used whenever a specific ⁠<title> is not set.
• Prevents the display of incomplete or strange titles like ⁠ - MyApp.

This is an example of my use case:
https://stackblitz.com/edit/vitejs-vite-eubhm97c?file=src%2FApp.tsx

CleanShot.2025-12-22.at.11.25.50.mp4

Additional information

• Would you be willing to help implement this feature?

[harlan-zw]

Hi, thanks for the issue. Please use template params as documented here https://unhead.unjs.io/docs/head/guides/core-concepts/titles#template-params, it will automatically handle missing titles

Alternatively use a function for template params and or set a default title when you createHead

[ItaiYosephi]

@harlan-zw seems like it doesn't work in version 2.0.19:
I was missing the plugin.
But there's still an issue with stale titles:
https://stackblitz.com/edit/vitejs-vite-stwqblkp?file=src%2FApp.tsx

CleanShot.2025-12-23.at.11.42.07.mp4

[ItaiYosephi]

Hi @harlan-zw,
Is there a fix planned for that?