ReadonlyidThe id read-only property of the NavigationHistoryEntry interface returns the id of the history entry, or an empty string if current document is not fully active. This is a unique, UA-generated value that always represents a specific history entry, useful to correlate it with an external resource such as a storage cache.
ReadonlyindexThe index read-only property of the NavigationHistoryEntry interface returns the index of the history entry in the history entries list (that is, the list returned by Navigation.entries()), or -1 if the entry does not appear in the list or if current document is not fully active.
ReadonlykeyThe key read-only property of the NavigationHistoryEntry interface returns the key of the history entry, or an empty string if current document is not fully active. This is a unique, UA-generated value that represents the history entry's slot in the entries list. It is used to navigate that particular slot via Navigation.traverseTo(). The key will be reused by other entries that replace the entry in the list (that is, if the NavigateEvent.navigationType is replace).
ReadonlysameThe sameDocument read-only property of the NavigationHistoryEntry interface returns true if this history entry is for the same document as the current Document value and current document is fully active, or false otherwise.
ReadonlyurlThe url read-only property of the NavigationHistoryEntry interface returns the absolute URL of this history entry. If the entry corresponds to a different Document than the current one (like sameDocument property is false), and that Document was fetched with a Referrer-Policy header set to no-referrer or origin, the property returns null. If current document is not fully active, it returns an empty string.
The addEventListener() method of the EventTarget interface sets up a function that will be called whenever the specified event is delivered to the target.
Optionaloptions: boolean | AddEventListenerOptionsThe addEventListener() method of the EventTarget interface sets up a function that will be called whenever the specified event is delivered to the target.
Optionaloptions: boolean | AddEventListenerOptionsThe dispatchEvent() method of the EventTarget sends an Event to the object, (synchronously) invoking the affected event listeners in the appropriate order. The normal event processing rules (including the capturing and optional bubbling phase) also apply to events dispatched manually with dispatchEvent().
The getState() method of the NavigationHistoryEntry interface returns a clone of the developer-supplied state associated with this history entry.
The removeEventListener() method of the EventTarget interface removes an event listener previously registered with EventTarget.addEventListener() from the target. The event listener to be removed is identified using a combination of the event type, the event listener function itself, and various optional options that may affect the matching process; see Matching event listeners for removal.
Optionaloptions: boolean | EventListenerOptionsThe removeEventListener() method of the EventTarget interface removes an event listener previously registered with EventTarget.addEventListener() from the target. The event listener to be removed is identified using a combination of the event type, the event listener function itself, and various optional options that may affect the matching process; see Matching event listeners for removal.
Optionaloptions: boolean | EventListenerOptions
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NavigationHistoryEntryinterface of the Navigation API represents a single navigation history entry.MDN Reference