Memory Navigator

A scoped, typed back stack for embedded experiences that need route-like navigation without taking over the browser URL.

Embedded navigator

Open a guide, change its tab, and continue into a topic. Add a note on any screen; Back restores the note attached to that history entry.

Guides

Example host

State attached to this entry

Live snapshot

{
  "current": {
    "route": {
      "kind": "guides"
    },
    "state": {
      "note": ""
    }
  },
  "canGoBack": false
}

The demo supplies all route meaning, rendering, and state policy. The navigator only owns its scoped history.

push

Opening a guide or topic creates a new history entry.

replace

Changing a guide tab updates the current route without adding history.

updateCurrentState

Each entry keeps its own note and restores it after Back.

subscribe

React observes stable snapshots through useSyncExternalStore.