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# WKWebExtension.DataRecord.Error

Constants that indicate errors in the [`WKWebExtension.DataRecord`](/documentation/WebKit/WKWebExtension/DataRecord) domain.

```
struct Error
```

## Topics

### Type Properties

[`static var errorDomain: String`](/documentation/WebKit/WKWebExtension/DataRecord/Error/errorDomain)

Indicates a [`WKWebExtension.DataRecord`](/documentation/WebKit/WKWebExtension/DataRecord) error.

[`static var localStorageFailed: WKWebExtension.DataRecord.Error.Code`](/documentation/WebKit/WKWebExtension/DataRecord/Error/localStorageFailed)

Indicates a failure occurred when either deleting or calculating local storage.

[`static var sessionStorageFailed: WKWebExtension.DataRecord.Error.Code`](/documentation/WebKit/WKWebExtension/DataRecord/Error/sessionStorageFailed)

Indicates a failure occurred when either deleting or calculating session storage.

[`static var synchronizedStorageFailed: WKWebExtension.DataRecord.Error.Code`](/documentation/WebKit/WKWebExtension/DataRecord/Error/synchronizedStorageFailed)

Indicates a failure occurred when either deleting or calculating synchronized storage.

[`static var unknown: WKWebExtension.DataRecord.Error.Code`](/documentation/WebKit/WKWebExtension/DataRecord/Error/unknown)

Indicates that an unknown error occurred.

## Relationships

### Conforms To

[`Sendable`](/documentation/Swift/Sendable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`CustomNSError`](/documentation/Foundation/CustomNSError)

[`Equatable`](/documentation/Swift/Equatable)

[`Error`](/documentation/Swift/Error)

[`Hashable`](/documentation/Swift/Hashable)

---

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