window.BeforeUnloadEvent.prototype | Huge DOM compatibility table

window . BeforeUnloadEvent . prototype

Browser	Version	Own?	Type	As String
AppleWebit	537.36.0	?	?	?
bingbot	2.0.0	?	?	?
BingPreview	1.0.0	?	?	?
BitSightBot	1.0.0	own	object	[object BeforeUnloadEvent]
Chrome	13.0.863	?	?	?
Chrome	41.0.2226	own	object	[object BeforeUnloadEvent]
Chrome	42.0.817	?	?	?
Chrome	56.0.2924	own	object	[object BeforeUnloadEvent]
Chrome	58.0.806	?	?	?
Chrome	68.0.3440	own	object	[object BeforeUnloadEvent]
Chrome	69.0.3497	?	?	?
Chrome	70.0.3538	own	object	[object BeforeUnloadEvent]
Chrome	71.0.3578	?	?	?
Chrome	72.0.3626	own	object	[object BeforeUnloadEvent]
Chrome	73.0.3683	?	?	?
Chrome	76.0.3809	own	object	[object BeforeUnloadEvent]
Chrome	77.0.3865	?	?	?
Chrome	79.0.3945	own	object	[object BeforeUnloadEvent]
Chrome	83.0.4103	?	?	?
Chrome	86.0.4240	own	object	[object BeforeUnloadEvent]
Chrome	89.0.4389	?	?	?
Chrome	90.0.4430	own	object	[object BeforeUnloadEvent]
Chrome	92.0.4506	?	?	?
Chrome	92.0.4515	own	object	[object BeforeUnloadEvent]
Chrome	94.0.4590	?	?	?
Chrome	94.0.4606	own	object	[object BeforeUnloadEvent]
Chrome	95.0.4624	?	?	?
Chrome	95.0.4630	own	object	[object BeforeUnloadEvent]
Chrome	96.0.4648	?	?	?
Chrome	96.0.4652	own	object	[object BeforeUnloadEvent]
Chrome	96.0.4655	?	?	?
Chrome	96.0.4662	own	object	[object BeforeUnloadEvent]
Chrome	97.0.4675	?	?	?
Chrome	97.0.4692	own	object	[object BeforeUnloadEvent]
Chrome	98.0.4723	?	?	?
Chrome	98.0.4744	own	object	[object BeforeUnloadEvent]
Chrome	100.0.0	?	?	?
Chrome	100.0.4867	own	object	[object BeforeUnloadEvent]
Chrome	101.0.4929	?	?	?
Chrome	101.0.4951	own	object	[object BeforeUnloadEvent]
Chrome	102.0.5005	?	?	?
Chrome	103.0.0	own	object	[object BeforeUnloadEvent]
Chrome	104.0.5109	?	?	?
Chrome	105.0.0	own	object	[object BeforeUnloadEvent]
Chrome	105.0.5195	?	?	?
Chrome	106.0.0	own	object	[object BeforeUnloadEvent]
Chrome	106.0.5249	?	?	?
Chrome	107.0.0	own	object	[object BeforeUnloadEvent]
Chrome	108.0.5359	?	?	?
Chrome	109.0.0	own	object	[object BeforeUnloadEvent]
Chrome	110.0.5449	?	?	?
Chrome	111.0.0	own	object	[object BeforeUnloadEvent]
Chrome	111.0.5532	?	?	?
Chrome	111.0.5563	own	object	[object BeforeUnloadEvent]
Chrome	112.0.5596	?	?	?
Chrome	112.0.5615	own	object	[object BeforeUnloadEvent]
Chrome	113.0.5672	?	?	?
Chrome	114.0.0	own	object	[object BeforeUnloadEvent]
Chrome	114.0.5735	?	?	?
Chrome	115.0.0	own	object	[object BeforeUnloadEvent]
Chrome	115.0.5790	?	?	?
Chrome	116.0.0	own	object	[object BeforeUnloadEvent]
Chrome	116.0.5845	?	?	?
Chrome	117.0.0	own	object	[object BeforeUnloadEvent]
Chrome	118.0.5993	?	?	?
Chrome	119.0.0	own	object	[object BeforeUnloadEvent]
Chrome	119.0.6045	?	?	?
Chrome	120.0.0	own	object	[object BeforeUnloadEvent]
Chrome	121.0.6167	?	?	?
Chrome	122.0.0	own	object	[object BeforeUnloadEvent]
Chrome	122.0.6261	?	?	?
Chrome	123.0.0	own	object	[object BeforeUnloadEvent]
Chrome	123.0.6312	?	?	?
Chrome	124.0.0	own	object	[object BeforeUnloadEvent]
Chrome	124.0.6315	?	?	?
Chrome	125.0.0	own	object	[object BeforeUnloadEvent]
Chrome	126.0.6478	?	?	?
Chrome	127.0.0	own	object	[object BeforeUnloadEvent]
Chrome	128.0.6613	?	?	?
Chrome	130.0.0	own	object	[object BeforeUnloadEvent]
Chrome	130.0.6723	?	?	?
CriOS	13.0.842	?	?	?
CriOS	79.0.3945	own	object	[object BeforeUnloadEvent]
CriOS	111.0.5563	?	?	?
CriOS	112.0.5615	own	object	[object BeforeUnloadEvent]
Edge	8.26144.0	?	?	?
Edge	92.0.902	own	object	[object BeforeUnloadEvent]
Edge	93.0.961	?	?	?
Edge	94.0.992	own	object	[object BeforeUnloadEvent]
Edge	98.0.1108	?	?	?
Edge	99.0.1150	own	object	[object BeforeUnloadEvent]
Edge	104.0.1279	?	?	?
Edge	104.0.1293	own	object	[object BeforeUnloadEvent]
Edge	105.0.1343	?	?	?
Edge	106.0.1370	own	object	[object BeforeUnloadEvent]
Edge	114.0.1264	?	?	?
Edge	114.0.1823	own	object	[object BeforeUnloadEvent]
Edge	115.0.0	?	?	?
Edge	115.0.1901	own	object	[object BeforeUnloadEvent]
Edge	117.0.2045	?	?	?
Edge	118.0.2088	own	object	[object BeforeUnloadEvent]
Edge	120.0.0	?	?	?
Edge	121.0.0	own	object	[object BeforeUnloadEvent]
Edge	123.0.0	?	?	?
Edge	124.0.0	own	object	[object BeforeUnloadEvent]
Edge	125.0.0	?	?	?
Edge	127.0.0	own	object	[object BeforeUnloadEvent]
Edge	129.0.0	?	?	?
Edge	130.0.0	own	object	[object BeforeUnloadEvent]
facebookexternalhit	1.1.0	?	?	?
Firefox	3.6.1	?	?	?
Firefox	52.0.0	own	object	[object BeforeUnloadEventPrototype]
Firefox	52.3.0	?	?	?
Firefox	59.0.0	own	object	[object BeforeUnloadEventPrototype]
Firefox	59.4.0	?	?	?
Firefox	68.0.0	own	object	[object BeforeUnloadEventPrototype]
Firefox	68.7.0	?	?	?
Firefox	70.0.0	own	object	[object BeforeUnloadEventPrototype]
Firefox	70.7.0	?	?	?
Firefox	88.0.0	own	object	[object BeforeUnloadEvent]
Firefox	89.0.0	?	?	?
Firefox	90.0.0	own	object	[object BeforeUnloadEvent]
Firefox	92.0.0	?	?	?
Firefox	93.0.0	own	object	[object BeforeUnloadEvent]
Firefox	94.0.2	?	?	?
Firefox	95.0.0	own	object	[object BeforeUnloadEvent]
Firefox	112.0.0	?	?	?
Firefox	113.0.0	own	object	[object BeforeUnloadEvent]
Firefox	114.0.0	?	?	?
Firefox	115.0.0	own	object	[object BeforeUnloadEvent]
Firefox	117.0.0	?	?	?
Firefox	118.0.0	own	object	[object BeforeUnloadEvent]
Firefox	119.0.0	?	?	?
Firefox	120.0.0	own	object	[object BeforeUnloadEvent]
Firefox	130.0.0	?	?	?
Firefox	131.0.0	own	object	[object BeforeUnloadEvent]
Firefox	134.0.0	?	?	?
FxiOS	9.3.0	?	?	?
FxiOS	36.0.0	own	object	[object BeforeUnloadEvent]
Googlebot	2.1.0	?	?	?
GSA	334.0.16777215	?	?	?
GSA	334.0.16777215	own	object	[object BeforeUnloadEvent]
GSA	334.0.16777215	?	?	?
HeadlessChrome	90.0.4430	own	object	[object BeforeUnloadEvent]
HeadlessChrome	129.0.6668	?	?	?
IE	11.0.0	own	object	[object BeforeUnloadEventPrototype]
Mobile	15.0.0	own	object	[object BeforeUnloadEvent]
Opera	8.10.0	?	?	?
PerplexityBot	1.0.0	?	?	?
render	2.0.0	own	object	[object BeforeUnloadEvent]
requests	2.32.3	?	?	?
Safari	3.0.5	?	?	?
Safari	4.0.0	own	object	[object BeforeUnloadEvent]
Safari	4.0.1	?	?	?
Safari	11.0.0	own	object	[object BeforeUnloadEventPrototype]
Safari	12.0.0	?	?	?
Safari	12.1.2	own	object	[object BeforeUnloadEventPrototype]
Safari	13.0.3	own	object	[object BeforeUnloadEvent]
Safari	15.6.3	?	?	?
Safari	15.6.6	own	object	[object BeforeUnloadEvent]
Safari	16.3.0	?	?	?
Safari	16.4.0	own	object	[object BeforeUnloadEvent]
Safari	99.0.143	?	?	?
Safari	537.36.0	own	object	[object BeforeUnloadEvent]
SamsungBrowser	17.0.0	own	object	[object BeforeUnloadEvent]
SamsungBrowser	18.0.0	?	?	?
SamsungBrowser	19.0.0	own	object	[object BeforeUnloadEvent]
SamsungBrowser	20.0.0	?	?	?
YandexBot	3.0.0	?	?	?
YandexRenderResourcesBot	1.0.0	own	object	[object BeforeUnloadEvent]
Zeno	76.0.0	?	?	?

Properties	AppleWebit	bingbot	BingPreview	BitSightBot	Chrome	CriOS	Edge	facebookexternalhit	Firefox	FxiOS	Googlebot	GSA	HeadlessChrome	IE	Mobile	Opera	PerplexityBot	render	requests	Safari	SamsungBrowser	YandexBot	YandexRenderResourcesBot	Zeno
ALT_MASK	?	?	?	?	41.0.2226	?	?	?	52.0.0	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
AT_TARGET	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
BLUR	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
bubbles	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
BUBBLING_PHASE	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
cancelable	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
cancelBubble	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
CAPTURING_PHASE	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
CHANGE	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
CLICK	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
composed	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
composedPath	?	?	?	?	41.0.0	107.0.0	99.0.0	?	59.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
constructor	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
CONTROL_MASK	?	?	?	?	41.0.2226	?	?	?	52.0.0	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
currentTarget	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
DBLCLICK	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
defaultPrevented	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
DRAGDROP	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
eventPhase	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
explicitOriginalTarget	?	?	?	?	41.0.2226	?	?	?	52.0.0	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
FOCUS	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
getPreventDefault	?	?	?	?	?	?	?	?	52.0.0	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
initEvent	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
KEYDOWN	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
KEYPRESS	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
KEYUP	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
META_MASK	?	?	?	?	41.0.2226	?	?	?	52.0.0	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
MOUSEDOWN	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
MOUSEDRAG	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
MOUSEMOVE	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
MOUSEOUT	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
MOUSEOVER	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
MOUSEUP	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
NONE	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
originalTarget	?	?	?	?	41.0.2226	?	?	?	52.0.0	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
path	?	?	?	?	56.0.0	?	99.0.1150	?	?	?	?	?	93.0.4577	?	?	?	?	?	?	?	17.0.0	?	?	?
preventDefault	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
returnValue	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
SELECT	?	?	?	?	56.0.2924	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
SHIFT_MASK	?	?	?	?	41.0.2226	?	?	?	52.0.0	?	?	?	?	?	?	?	?	?	?	?	?	?	?	?
srcElement	?	?	?	?	41.0.0	107.0.0	99.0.0	?	68.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
stopImmediatePropagation	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
stopPropagation	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
target	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
timeStamp	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?
type	?	?	?	?	41.0.0	107.0.0	99.0.0	?	52.0.0	36.0.0	?	258.0.16777215	93.0.4577	?	15.0.0	?	?	?	?	11.0.0	17.0.0	?	?	?