NavigationHistoryEntry: id property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The 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.

This differs from the key of a history entry. The key is a unique, UA-generated value that represents the history entry's slot in the entries list rather than the entry itself. 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).

Value

A string representing the id of the NavigationHistoryEntry.

Examples

js
const current = navigation.currentEntry;
console.log(current.id);

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Opera Safari Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet WebView Android
id 102 102 No 88 No 102 No 70 No 19.0 102

See also

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https://developer.mozilla.org/en-US/docs/Web/API/NavigationHistoryEntry/id