coderef

Local network accessLimited availability

The "local-network-access" user permission (and certain actions that imply this permission, such as a fetch() request with { targetAddressSpace: "local" }) allows a site to send requests to servers on a user's local network.

Not yet supported in all major browsers — check the table and provide a fallback.

How to use ↓Compare browsers

Browser support

DesktopChrome
1–141Not supported
142+Supportedsince Oct 28, 2025
Current: 155
Edge
12–141Not supported
142+Supportedsince Oct 31, 2025
Current: 154
Firefox
✕Not supportedup to 157
Current: 157
Safari
✕Not supportedup to 27
Current: 27
MobileChrome Android
18–141Not supported
142+Supportedsince Oct 28, 2025
Current: 155
Firefox Android
✕Not supportedup to 157
Current: 157
Safari iOS
✕Not supportedup to 27
Current: 27

How to use

Not supported in Firefox, Safari, Firefox Android, Safari iOS. Use feature detection below and provide a fallback (or a polyfill) for those browsers.

Example

Full syntax and examples are on MDN: targetAddressSpace.

Feature detection

JS · check before using
if ("Request" in globalThis && "targetAddressSpace" in Request.prototype) {
  // Request.targetAddressSpace is available
}

Documentation (MDN)

Specification