Allow ServiceWorker to control srcdoc iframes

Policy ID: ServiceWorkerToControlSrcdocIframeEnabled
Scope: Computer Configuration, User Configuration
Supported on: Microsoft Windows 7 or later
Source: Google Chrome Policy Templates (version 156.0.8078.80)
Category: Google › Google Chrome

Description

https://github.com/w3c/ServiceWorker/issues/765 asks srcdoc iframe with
the "allow-same-origin" sandbox attribute to be under ServiceWorker control.

Setting the policy to Enabled or leaving it unset means
Google Chrome makes srcdoc iframes
with "allow-same-origin" sandbox attributes to be under ServiceWorker control.

Setting the policy to Disabled leaves the srcdoc iframe not controlled by
ServiceWorker.

This policy is intended to be temporary and will be removed in 2026.

Registry

ComputerHKEY_LOCAL_MACHINE

HKLM\Software\Policies\Google\Chrome View registry values

ServiceWorkerToControlSrcdocIframeEnabledREG_DWORD

UserHKEY_CURRENT_USER

HKCU\Software\Policies\Google\Chrome View registry values

ServiceWorkerToControlSrcdocIframeEnabledREG_DWORD

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