NavigationDestination: index property
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
  The index read-only property of the
  NavigationDestination interface returns the index value of the destination NavigationHistoryEntry if the NavigateEvent.navigationType is traverse, or -1 otherwise.
Value
A number representing the index of the destination NavigationHistoryEntry, or -1.
Examples
js
navigation.addEventListener("navigate", (event) => {
  console.log(event.destination.index);
});
Specifications
| Specification | 
|---|
| Unknown specification  # dom-navigationdestination-index  | 
Browser compatibility
BCD tables only load in the browser