# `SessionState.checkpoint`

> 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 [`SessionState`](SessionState.md) · stable · since 2.0.0 · called as `session.state().checkpoint`

```ts
readonly checkpoint: JsonValue | null;
```

Recorded: the page state you stored with a commit (`checkpoint` option); null when none.

## Generic-API test (spec 3.1)

| Rule | Result |
| --- | --- |
| 1. Neutral name | pass: `checkpoint` names no product |
| 2. A precedent | pass: [Unity Undo.RecordObject](https://docs.unity3d.com/ScriptReference/Undo.RecordObject.html) (row `X6`) |
| 3. Two apps, or labs | pass: 18 apps (ledger: app-37356bf09f, app-4f16d2f6da, app-4fd23bc869, app-822bb9d6aa, app-8675b3225c, app-bcb7ef21da, app-c1384707fc, app-ddfb017681 and 10 more; fleet cross-check: app-37356bf09f, app-4fd23bc869, app-822bb9d6aa, app-8675b3225c, app-bcb7ef21da, app-c1384707fc, app-e3b47169bc, app-e61a0b42ad and 6 more) |
| 4. The cheaper fix first | decided per need in Appendix B: rows `X6` at tier stable (a member only where no rule, data, asset or app code serves the need) |