PerformanceNavigation: type property

The legacy PerformanceNavigation.type read-only property returns an unsigned short containing a constant describing how the navigation to this page was done.

[!WARNING] This interface of this property is deprecated in the Navigation Timing Level 2 specification. Please use the PerformanceNavigationTiming interface instead.

Value

An unsigned short.

Possible values are:

Value	Constant name	Meaning
0	TYPE_NAVIGATE	The page was accessed by following a link, a bookmark, a form submission, a script, or typing the URL in the address bar.
1	TYPE_RELOAD	The page was accessed by clicking the Reload button or via the [`reload()`](/firefox/mdn/api/location/reload/) method.
2	TYPE_BACK_FORWARD	The page was accessed by navigating into the history.
255	TYPE_RESERVED	Any other way.

[!NOTE] Historically, developers tested for a type of "TYPE_BACK_FORWARD" to get an indication of back/forward cache (bfcache) hit rate. This however did not provide any reasons for bfcache blocking, or any other data. The notRestoredReasons property should be used to monitor the bfcache, going forward. See Monitoring bfcache blocking reasons for more information.

Specifications

Browser compatibility

See also

• The PerformanceNavigation interface it belongs to.