1 [forum](../README.md) / [Exports](../modules.md) / App
5 It's possible to tell SvelteKit how to type objects inside your app by declaring the `App` namespace. By default, a new project will have a file called `src/app.d.ts` containing the following:
8 /// <reference types="@sveltejs/kit" />
10 declare namespace App {
21 By populating these interfaces, you will gain type safety when using `event.locals`, `event.platform`, `session` and `stuff`:
27 - [Locals](../interfaces/App.Locals.md)
28 - [Platform](../interfaces/App.Platform.md)
29 - [Session](../interfaces/App.Session.md)
30 - [Stuff](../interfaces/App.Stuff.md)