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WebKit / WKWebExtension / WKWebExtension.MatchPattern / WKWebExtension.MatchPattern.Error / WKWebExtension.MatchPattern.Error.Code / WKWebExtension.MatchPattern.Error.Code.unknown

WKWebExtension.MatchPattern.Error.Code.unknown

Indicates that an unknown error occurred.

Declaration

case unknown

Open on developer.apple.com

WebKitCase

iOS 18.4+iPadOS 18.4+Mac Catalyst 18.4+macOS 15.4+visionOS 2.4+

Built on 2026-05-07