# Constants (/themes/sdk/reference/slots/constants)

```ts
import { … } from '@poltura/theme-sdk/slots';
```

## `APP_SLOT_NAMES` [#app_slot_names]

Every app slot a theme can place.

```ts
const APP_SLOT_NAMES: readonly AppSlotName[]
```

## `HOST_SLOT_NAMES` [#host_slot_names]

Every host widget name.

```ts
const HOST_SLOT_NAMES: readonly HostSlotName[]
```