# node:v8

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# `node:v8`

## Import

```js
import v8 from "nstdlib/v8";
```

> [!NOTE]
> Only the API surface is available. No V8 introspection binding.

## Runtime support

| Where it runs | Status | Export coverage | Details |
| ------------- | ------ | --------------- | ------- |
| **nstd** | ⚠️ some support | – | 2/20 of Node's own eligible tests pass under nstd. |
| **Browser** | ❔ not tested | 100% of Node.js | It imports with the small process shim. 24/24 Node.js exports are available. No module-specific behavior test ran. |
| **Node.js (host)** | ⚠️ some support | 100% of Node.js | 24/24 exports. |

## Exports (24 of 24)

Each cell shows what happens when code reads an export:

- ✅ Available through every import style. A named error also counts.
- ⚠️ Available through only some import styles.
- ❔ The export exists but has no value.
- ❌ The export does not exist.
- – This environment was not measured.

| Export | Node.js | nstdlib | browser |
| ------ | ------- | ------- | ------- |
| `DefaultDeserializer` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `DefaultSerializer` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `Deserializer` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `GCProfiler` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `Serializer` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `cachedDataVersionTag` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `deserialize` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `getCppHeapStatistics` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `getHeapCodeStatistics` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `getHeapSnapshot` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `getHeapSpaceStatistics` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `getHeapStatistics` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `isStringOneByteRepresentation` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `promiseHooks` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `queryObjects` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `serialize` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `setFlagsFromString` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `setHeapSnapshotNearHeapLimit` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `startCpuProfile` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `startHeapProfile` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `startupSnapshot` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `stopCoverage` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `takeCoverage` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |
| `writeHeapSnapshot` | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> | <span title="Available" aria-label="Available">✅</span> |