Translations and other 'load once' data

[laurentvd]

In follow up of inertiajs/inertia-laravel#109. I often need data that should only be sent only with the initial request. This would be useful for sending things you only need once, like an array with frontend translations or the theme configuration. It would be passed to the props of the component, regardless of whether it is the first request or sequential ones. The JS library would 'remember' the prop from the initial request.

It is similar to how Inertia::lazy works, but then something like Inertia::once. It probably makes most sense when used in middleware rather than on a page level. Here's an example, based on partial reloads.

// ALWAYS included on first visit
// NEVER included on partial reloads
// ONLY evaluated when needed
'translations' => Inertia::once(fn () => trans('frontend')),

Any thoughts on this?