Window: originAgentCluster property

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The originAgentCluster read-only property of the Window interface returns true if this window belongs to an origin-keyed agent cluster: this means that the operating system has provided dedicated resources (for example an operating system process) to this window's origin that are not shared with windows from other origins.

Otherwise this property returns false.

Windows that are part of an origin-keyed agent cluster are subjects to some additional restrictions, compared with windows that are not. In particular, they cannot:

To request that the browser assign this window to an origin-keyed agent cluster, the server must send the Origin-Agent-Cluster response header.

Note that the origin-keyed agent cluster feature is only supported in secure contexts. If a site is not a secure context, the window.originAgentCluster will always return false.


HTML Standard
# origin-keyed-agent-clusters

Browser compatibility

BCD tables only load in the browser

See also