🔗 Linked issue

resolves nuxt/nuxt#12931

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This PR allows the default values for useCookie, useState, useAsyncData and useFetch to return a ref, which will be reused in the composable rather than recreated.

So, for example:

const someRef = ref('test value')
const cookie = useCookie('value', () => someRef)
console.log(someRef === cookie) // true

However, this is to enable advanced use cases only and users should not assume that the factory function will be run. In many cases the factory function is not run, such as when state is deserialized from payload.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.