Load server data at Layout (root) level

[rtritto]

The global Layout (/pages/+Layout) needs to load data from server (e.g. globalThis or env vars) before render.

I did a try with /pages/+data hook but it's not recognized at pages level.
In hooks, I also checked other hooks but I didn't found nothing.
Maybe #1833 can achieve.

[brillout]

Have you seen https://vike.dev/Layout#data-fetching?

[brillout]

I made that section clearer: f38b36a.

[rtritto]

Thanks, now it's clear 🔝

Currently is there a way to add a custom property (e.g. value from globaThis or env var) to /pages/+config and then read it in /pages/+Layout or the only way is with the /pages/+data (#1833)?

Edit: Probably the only way is with #1833 because +config can't be used at runtime (source).

Edit2: In my use case, I confirm that #1833 is the only way with +data.once

[brillout]

Indeed +config isn't executed at runtime.