demo · v142

LNA prompt

Type an origin and a target URL. The simulator classifies both into public / private / loopback IP spaces and tells you whether Chrome 142 will allow the fetch silently, prompt the user, or block it. Press try fetch to actually attempt the request.

initiator IP space
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target IP space
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crosses inward?
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Chrome 142 outcome
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Classification is a client-side approximation of the LNA spec rules. Real verification requires a Chrome 142+ build, public initiator, and a private target — the prompt appears in the browser UI.

relevant API

// From https://example.com (public space)
await fetch("http://192.168.1.1/admin");
// Chrome 142+ shows the Local Network Access permission prompt
// before the request leaves the browser.

see also