HashChangeEvent

hashchange hashchange

Baseline: Widely available on the web, in every major browser since Jul 2015, and long enough to count on (since Jan 2018).

niso: Partial 47%. 10 of 21 subtests pass, by system: Linux 47%, macOS 47%. Engines: QuickJS, the engine niso's WPT run uses; Node and Porffor have no recorded run. WPT results recorded at f3b4fa8, 2026-11-10; web-features 3.45.0. WPT tests · niso's support · HashChangeEvent, Window

HashChangeEvent is an interface in idl/html.webidl, inheriting Event, exposed in Window. What it does is on MDN; this page says what niso has of it.

Status

The web features its members belong to, each with its Baseline status on the web and how much of the feature’s WPT suite passes in niso (see Web platform support).

Feature	On the web	In niso	Members
hashchange	Widely available	Partial 47% 10 of 21 subtests pass	3

Members

oldURL

attribute

readonly attribute USVString oldURL;

int32_t niso_hash_change_event_get_old_url(niso_dom* dom, niso_handle self, niso_str* out);

newURL

attribute

readonly attribute USVString newURL;

int32_t niso_hash_change_event_get_new_url(niso_dom* dom, niso_handle self, niso_str* out);

Not in niso yet

Members the web has, by the BCD keys web-features 3.45.0 lists, that idl/ doesn’t declare. The list is partial: web-features lists only the keys it maps to a feature.

• HashChangeEvent (hashchange)