# `ViewerDocumentJson.camera`

> Contract 2.0.0 · package sha256 `a857eca95b35921109faf997094bb4192f12527d9d0fcd4be7e97f06425bad6e` · generated from `configurator-runtime.d.ts` by `services/onsite-scripter/scripts/build-contract-docs.mjs`; edit the source, not this file.

Property of [`ViewerDocumentJson`](ViewerDocumentJson.md) · stable · since 2.0.0 · called as `session.document.camera`

```ts
camera?: {
  limits?: CameraLimits;
  lens?: CameraLens;
  views?: Readonly<Record<string, CameraView | LookAtView>>;
};
```

The page's camera defaults: its limits, its lens and its named views. Each merges over the platform's and the account's, and [`camera.limits`](Camera.limits.md), [`camera.lens`](Camera.lens.md) and [`camera.views.go`](Camera.views.go.md) read them.

**Default:** the platform and account defaults

## Fields

<a id="limits"></a>
### `limits`

```ts
limits?: CameraLimits;
```

The document's limits; [`camera.limits`](Camera.limits.md) merges over them.

**Default:** the lower layers'

<a id="lens"></a>
### `lens`

```ts
lens?: CameraLens;
```

The document's lens; [`camera.lens(null)`](Camera.lens.md) restores it.

**Default:** the lower layers'

<a id="views"></a>
### `views`

```ts
views?: Readonly<Record<string, CameraView | LookAtView>>;
```

Named views for [`camera.views.go(name)`](Camera.views.go.md): an orbit view or, as 1.x camera presets store them, a look-at view.

**Default:** the lower layers'

## Generic-API test (spec 3.1)

| Rule | Result |
| --- | --- |
| 1. Neutral name | pass: `camera` names no product |
| 2. A precedent | pass (through its owner [`ViewerDocumentJson`](ViewerDocumentJson.md)): a correctness rule (rows `G48`) |
| 3. Two apps, or labs | pass: 28 apps (ledger: app-04c2774145, app-0c773a4ee3, app-37356bf09f, app-378d190f1b, app-4762caacdc, app-4f16d2f6da, app-4fd23bc869, app-510d750508 and 20 more; fleet cross-check: app-04c2774145, app-0c773a4ee3, app-37356bf09f, app-378d190f1b, app-4762caacdc, app-4f16d2f6da, app-4fd23bc869, app-510d750508 and 20 more) |
| 4. The cheaper fix first | decided per need in Appendix B: rows `G48` (through its owner [`ViewerDocumentJson`](ViewerDocumentJson.md)) at tier fix, stable (a member only where no rule, data, asset or app code serves the need) |