# `AnchorSpec`

> 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.

Interface · `import type { AnchorSpec } from '@holostep-configurators/runtime-client/contract';` · stable · since 2.0.0 · section 13. Overlays

A point the runtime tracks on screen for your own DOM.

## Members

| Member | Kind | Summary |
| --- | --- | --- |
| <a id="id"></a>[`id`](AnchorSpec.id.md) | property | Unique among the anchors; 'anchors:moved' reports it. |
| <a id="at"></a>[`at`](AnchorSpec.at.md) | property | World point, or local to the first part `on` matches in document order ([`Parts.first()`](Parts.first.md)): for `{ node }`, which matches the model's root and every part under it, that is the model's root, so the point is in the model's… |
| <a id="on"></a>[`on?`](AnchorSpec.on.md) | property | Follow this part: the first one the query matches in document order (see `at`). |

## Declaration

```ts
export interface AnchorSpec {
  id: string;
  at: Point3;
  on?: Query;
}
```

## Generic-API test (spec 3.1)

| Rule | Result |
| --- | --- |
| 1. Neutral name | pass: `AnchorSpec` names no product |
| 2. A precedent | not recorded: no ledger row (coverage.json) names this member or its owner |
| 3. Two apps, or labs | not recorded: no ledger row names this member or its owner |
| 4. The cheaper fix first | not recorded per member (Appendix B decides it per need) |