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Coverage / websockets

WebSockets

Specification: websockets.spec.whatwg.org/. 2 interfaces defined here, 19 members exposed on Window (Web IDL). Group: Platform and app.

Existence only: “present” means the name is defined where Web IDL puts it, not that it behaves as the standard says. The featured checks test behavior.

Share present per engine
EngineMembers presentInterfaces present
warpdom0.1.6maintainer's engine16% (3 of 19)1 of 2
happy-dom21.0.358% (11 of 19)2 of 2
jsdom30.1.3100% (19 of 19)2 of 2
linkedom0.18.1384% (16 of 19)1 of 2
2 of 2 interfaces
CloseEvent3 memberswarpdom: Presenthappy-dom: Presentjsdom: Presentlinkedom: Missing
WebSocket16 memberswarpdom: Missinghappy-dom: Presentjsdom: Presentlinkedom: Node.js

Probed 2026-10-19. Data: idl.json (CC BY 4.0).