DOM Events

DOM Events are sent to notify code of interesting things that have taken place. Each event is represented by an object which is based on the Event interface, and may have additional custom fields and/or functions used to get additional information about what happened. Events can represent everything from basic user interactions to automated notifications of things happening in the rendering model.

This article offers a list of events that can be sent; some are standard events defined in official specifications, while others are events used internally by specific browsers; for example, Mozilla-specific events are listed so that add-ons can use them to interact with the browser.

Most Common Categories

Resource Events

Event Name	Fired When
cached	The resources listed in the manifest have been downloaded, and the application is now cached.
error	A resource failed to load.
abort	The loading of a resource has been aborted.
load	A resource and its dependent resources have finished loading.
beforeunload	The window, the document and its resources are about to be unloaded.
unload	The document or a dependent resource is being unloaded.

Network Events

Event Name	Fired When
online	The browser has gained access to the network.
offline	The browser has lost access to the network.

Focus Events

Event Name	Fired When
focus	An element has received focus (does not bubble).
blur	An element has lost focus (does not bubble).

Websocket Events

Event Name	Fired When
open	A WebSocket connection has been established.
message	A message is received through a WebSocket.
error	A WebSocket connection has been closed with prejudice (some data couldn't be sent for example).
close	A WebSocket connection has been closed.

Session History Events

Event Name	Fired When
pagehide	A session history entry is being traversed from.
pageshow	A session history entry is being traversed to.
popstate	A session history entry is being navigated to (in certain cases).

CSS Animation Events

Event Name	Fired When
animationstart	A CSS animation has started.
animationend	A CSS animation has completed.
animationiteration	A CSS animation is repeated.

Form Events

Event Name	Fired When
reset	The reset button is pressed
submit	The submit button is pressed

Printing Events

Event Name	Fired When
beforeprint	The print dialog is opened
afterprint	The print dialog is closed

Text Composition Events

Event Name	Fired When
compositionstart	The composition of a passage of text is prepared (similar to keydown for a keyboard input, but works with other inputs such as speech recognition).
compositionupdate	A character is added to a passage of text being composed.
compositionend	The composition of a passage of text has been completed or canceled.

View Events

Event Name	Fired When
fullscreenchange	An element was turned to fullscreen mode or back to normal mode.
fullscreenerror	It was impossible to switch to fullscreen mode for technical reasons or because the permission was denied.
resize	The document view has been resized.
scroll	The document view or an element has been scrolled.

Clipboard Events

Event Name	Fired When
cut	The selection has been cut and copied to the clipboard
copy	The selection has been copied to the clipboard
paste	The item from the clipboard has been pasted

Keyboard Events

Event Name	Fired When
keydown	ANY key is pressed
keypress	ANY key except Shift, Fn, CapsLock is in pressed position. (Fired continously.)
keyup	ANY key is released

Mouse Events

Event Name	Fired When
mouseenter	A pointing device is moved onto the element that has the listener attached.
mouseover	A pointing device is moved onto the element that has the listener attached or onto one of its children.
mousemove	A pointing device is moved over an element. (Fired continously as the mouse moves.)
mousedown	A pointing device button (ANY button) is pressed on an element.
mouseup	A pointing device button (ANY button) is released over an element.
click	A pointing device button (ANY button) has been pressed and released on an element.
dblclick	A pointing device button is clicked twice on an element.
contextmenu	The right button of the mouse is clicked (before the context menu is displayed).
wheel	A wheel button of a pointing device is rotated in any direction.
mouseleave	A pointing device is moved off the element that has the listener attached.
mouseout	A pointing device is moved off the element that has the listener attached or off one of its children.
select	Some text is being selected.
pointerlockchange	The pointer was locked or released.
pointerlockerror	It was impossible to lock the pointer for technical reasons or because the permission was denied.

Drag & Drop Events

Event Name	Fired When
dragstart	The user starts dragging an element or text selection.
drag	An element or text selection is being dragged (Fired continuously every 350ms).
dragend	A drag operation is being ended (by releasing a mouse button or hitting the escape key).
dragenter	A dragged element or text selection enters a valid drop target.
dragover	An element or text selection is being dragged over a valid drop target. (Fired continuously every 350ms.)
dragleave	A dragged element or text selection leaves a valid drop target.
drop	An element is dropped on a valid drop target.

Media Events

Event Name	Fired When
durationchange	The duration attribute has been updated.
loadedmetadata	The metadata has been loaded.
loadeddata	The first frame of the media has finished loading.
canplay	The browser can play the media, but estimates that not enough data has been loaded to play the media up to its end without having to stop for further buffering of content.
canplaythrough	The browser estimates it can play the media up to its end without stopping for content buffering.
ended	Playback has stopped because the end of the media was reached.
emptied	The media has become empty; for example, this event is sent if the media has already been loaded (or partially loaded), and the load() method is called to reload it.
stalled	The user agent is trying to fetch media data, but data is unexpectedly not forthcoming.
suspend	Media data loading has been suspended.
play	Playback has begun.
playing	Playback is ready to start after having been paused or delayed due to lack of data.
pause	Playback has been paused.
waiting	Playback has stopped because of a temporary lack of data.
seeking	A seek operation began.
seeked	A seek operation completed.
ratechange	The playback rate has changed.
timeupdate	The time indicated by the currentTime attribute has been updated.
volumechange	The volume has changed.
complete	The rendering of an OfflineAudioContext is terminated.
ended	Playback has stopped because the end of the media was reached.
audioprocess	The input buffer of a ScriptProcessorNode is ready to be processed.

Progress Events

Event Name	Fired When
loadstart	Progress has begun.
progress	In progress.
error	Progression has failed.
timeout	Progression is terminated due to preset time expiring.
abort	Progression has been terminated (not due to an error).
load	Progression has been successful.
loadend	Progress has stopped (after "error", "abort" or "load" have been dispatched).

Storage events

change (see Non-standard events)
storage

Update events

checking
downloading
error
noupdate
obsolete
updateready

Value change events

broadcast
CheckboxStateChange
hashchange
input
RadioStateChange
readystatechange
ValueChange

Uncategorized events

invalid
localized
message
message
message
open
show

Less Common and NonStandard Categories

SVG events

SVGAbort
SVGError
SVGLoad
SVGResize
SVGScroll
SVGUnload
SVGZoom

Database events

abort
blocked
complete
error (link)
success
upgradeneeded
versionchange

Notification events

AlertActive
AlertClose

CSS events

CssRuleViewRefreshed
CssRuleViewChanged
CssRuleViewCSSLinkClicked
transitionend

Script events

afterscriptexecute
beforescriptexecute

Menu events

DOMMenuItemActive
DOMMenuItemInactive

Window events

DOMWindowCreated
DOMTitleChanged
DOMWindowClose
SSWindowClosing
SSWindowStateReady
SSWindowStateBusy
close

Document events

DOMLinkAdded
DOMLinkRemoved
DOMMetaAdded
DOMMetaRemoved
DOMWillOpenModalDialog
DOMModalDialogClosed

Popup events

popuphidden
popuphiding
popupshowing
popupshown
DOMPopupBlocked

Tab events

TabOpen
TabClose
TabSelect
TabShow
TabHide
TabPinned
TabUnpinned
SSTabClosing
SSTabRestoring
SSTabRestored
visibilitychange

Battery events

chargingchange
chargingtimechange
dischargingtimechange
levelchange

Call events

alerting
busy
callschanged
cfstatechange
connected
connecting
dialing
disconnected
disconnecting
error
held, holding
incoming
resuming
statechange
voicechange

Sensor events

compassneedscalibration
devicelight
devicemotion
deviceorientation
deviceproximity
MozOrientation
orientationchange
userproximity

Smartcard events

icccardlockerror
iccinfochange
smartcard-insert
smartcard-remove
stkcommand
stksessionend
cardstatechange

SMS and USSD events

delivered
received
sent
ussdreceived

Frame events

mozbrowserclose
mozbrowsercontextmenu
mozbrowsererror
mozbrowsericonchange
mozbrowserlocationchange
mozbrowserloadend
mozbrowserloadstart
mozbrowseropenwindow
mozbrowsersecuritychange
mozbrowsershowmodalprompt (link)
mozbrowsertitlechange
DOMFrameContentLoaded

DOM mutation events

DOMAttributeNameChanged
DOMAttrModified
DOMCharacterDataModified
DOMContentLoaded
DOMElementNameChanged
DOMNodeInserted
DOMNodeInsertedIntoDocument
DOMNodeRemoved
DOMNodeRemovedFromDocument
DOMSubtreeModified

Touch events

MozEdgeUIGesture
MozMagnifyGesture
MozMagnifyGestureStart
MozMagnifyGestureUpdate
MozPressTapGesture
MozRotateGesture
MozRotateGestureStart
MozRotateGestureUpdate
MozSwipeGesture
MozTapGesture
MozTouchDown
MozTouchMove
MozTouchUp
touchcancel
touchend
touchenter
touchleave
touchmove
touchstart

Pointer events

pointerover
pointerenter
pointerdown
pointermove
pointerup
pointercancel
pointerout
pointerleave
gotpointercapture
lostpointercapture

Standard events

These events are defined in official Web specifications, and should be common across browsers. Each event is listed along with the interface representing the object sent to recipients of the event (so you can find information about what data is provided with each event) as well as a link to the specification or specifications that define the event.

Event Name	Event Type	Specification	Fired when...
abort	UIEvent	DOM L3	The loading of a resource has been aborted.
abort	ProgressEvent	Progress and XMLHttpRequest	Progression has been terminated (not due to an error).
abort	Event	IndexedDB	A transaction has been aborted.
afterprint	Event	HTML5	The associated document has started printing or the print preview has been closed.
animationend	AnimationEvent	CSS Animations	A CSS animation has completed.
animationiteration	AnimationEvent	CSS Animations	A CSS animation is repeated.
animationstart	AnimationEvent	CSS Animations	A CSS animation has started.
appinstalled	Event	Web App Manifest	A web application is successfully installed as a progressive web app.
audioprocess	AudioProcessingEvent	Web Audio API The definition of 'audioprocess' in that specification.	The input buffer of a ScriptProcessorNode is ready to be processed.
audioend	Event	Web Speech API	The user agent has finished capturing audio for speech recognition.
audiostart	Event	Web Speech API	The user agent has started to capture audio for speech recognition.
beforeprint	Event	HTML5	The associated document is about to be printed or previewed for printing.
beforeunload	BeforeUnloadEvent	HTML5	The window, the document and its resources are about to be unloaded.
blocked		IndexedDB	An open connection to a database is blocking a versionchange transaction on the same database.
blur	FocusEvent	DOM L3	An element has lost focus (does not bubble).
boundary	SpeechSynthesisEvent	Web Speech API	The spoken utterance reaches a word or sentence boundary
cached	Event	Offline	The resources listed in the manifest have been downloaded, and the application is now cached.
canplay	Event	HTML5 media	The user agent can play the media, but estimates that not enough data has been loaded to play the media up to its end without having to stop for further buffering of content.
canplaythrough	Event	HTML5 media	The user agent can play the media up to its end without having to stop for further buffering of content.
change	Event	DOM L2, HTML5	The change event is fired for <input>, <select>, and <textarea> elements when a change to the element's value is committed by the user.
checking	Event	Offline	The user agent is checking for an update, or attempting to download the cache manifest for the first time.
click	MouseEvent	DOM L3	A pointing device button has been pressed and released on an element.
close	Event	WebSocket	A WebSocket connection has been closed.
complete		IndexedDB	A transaction successfully completed.
complete	OfflineAudioCompletionEvent	Web Audio API The definition of 'OfflineAudioCompletionEvent' in that specification.	The rendering of an OfflineAudioContext is terminated.
compositionend	CompositionEvent	DOM L3	The composition of a passage of text has been completed or canceled.
compositionstart	CompositionEvent	DOM L3	The composition of a passage of text is prepared (similar to keydown for a keyboard input, but works with other inputs such as speech recognition).
compositionupdate	CompositionEvent	DOM L3	A character is added to a passage of text being composed.
contextmenu	MouseEvent	HTML5	The right button of the mouse is clicked (before the context menu is displayed).
copy	ClipboardEvent	Clipboard	The text selection has been added to the clipboard.
cut	ClipboardEvent	Clipboard	The text selection has been removed from the document and added to the clipboard.
dblclick	MouseEvent	DOM L3	A pointing device button is clicked twice on an element.
devicechange	Event	Media Capture and Streams	A media device such as a camera, microphone, or speaker is connected or removed from the system.
devicelight	DeviceLightEvent	Ambient Light Events	Fresh data is available from a light sensor.
devicemotion	DeviceMotionEvent	Device Orientation Events	Fresh data is available from a motion sensor.
deviceorientation	DeviceOrientationEvent	Device Orientation Events	Fresh data is available from an orientation sensor.
deviceproximity	DeviceProximityEvent	Proximity Events	Fresh data is available from a proximity sensor (indicates an approximated distance between the device and a nearby object).
DOMActivate	UIEvent	DOM L3	A button, link or state changing element is activated (use click instead).
DOMAttributeNameChanged	MutationNameEvent	DOM L3 Removed	The name of an attribute changed (use mutation observers instead).
DOMAttrModified	MutationEvent	DOM L3	The value of an attribute has been modified (use mutation observers instead).
DOMCharacterDataModified	MutationEvent	DOM L3	A text or another CharacterData has changed (use mutation observers instead).
DOMContentLoaded	Event	HTML5	The document has finished loading (but not its dependent resources).
DOMElementNameChanged	MutationNameEvent	DOM L3 Removed	The name of an element changed (use mutation observers instead).
DOMFocusIn Unimplemented	FocusEvent	DOM L3	An element has received focus (use focus or focusin instead).
DOMFocusOut Unimplemented	FocusEvent	DOM L3	An element has lost focus (use blur or focusout instead).
DOMNodeInserted	MutationEvent	DOM L3	A node has been added as a child of another node (use mutation observers instead).
DOMNodeInsertedIntoDocument	MutationEvent	DOM L3	A node has been inserted into the document (use mutation observers instead).
DOMNodeRemoved	MutationEvent	DOM L3	A node has been removed from its parent node (use mutation observers instead).
DOMNodeRemovedFromDocument	MutationEvent	DOM L3	A node has been removed from the document (use mutation observers instead).
DOMSubtreeModified	MutationEvent	DOM L3	A change happened in the document (use mutation observers instead).
downloading	Event	Offline	The user agent has found an update and is fetching it, or is downloading the resources listed by the cache manifest for the first time.
drag	DragEvent	HTML5	An element or text selection is being dragged (every 350ms).
dragend	DragEvent	HTML5	A drag operation is being ended (by releasing a mouse button or hitting the escape key).
dragenter	DragEvent	HTML5	A dragged element or text selection enters a valid drop target.
dragleave	DragEvent	HTML5	A dragged element or text selection leaves a valid drop target.
dragover	DragEvent	HTML5	An element or text selection is being dragged over a valid drop target (every 350ms).
dragstart	DragEvent	HTML5	The user starts dragging an element or text selection.
drop	DragEvent	HTML5	An element is dropped on a valid drop target.
durationchange	Event	HTML5 media	The duration attribute has been updated.
emptied	Event	HTML5 media	The media has become empty; for example, this event is sent if the media has already been loaded (or partially loaded), and the load() method is called to reload it.
end	Event	Web Speech API	The speech recognition service has disconnected.
end	SpeechSynthesisEvent	Web Speech API	The utterance has finished being spoken.
ended	Event	HTML5 media	Playback has stopped because the end of the media was reached.
ended	Event	Web Audio API	Playback has stopped because the end of the media was reached.
error	UIEvent	DOM L3	A resource failed to load.
error	ProgressEvent	Progress and XMLHttpRequest	Progression has failed.
error	Event	Offline	An error occurred while downloading the cache manifest or updating the content of the application.
error	Event	WebSocket	A WebSocket connection has been closed with prejudice (some data couldn't be sent for example).
error	Event	Server Sent Events	An event source connection has been failed.
error	Event	IndexedDB	A request caused an error and failed.
error	Event	Web Speech API	A speech recognition error occurs.
error	SpeechSynthesisErrorEvent	Web Speech API	An error occurs that prevents the utterance from being successfully spoken.
focus	FocusEvent	DOM L3	An element has received focus (does not bubble).
focusinUnimplemented (see bug 687787)	FocusEvent	DOM L3	An element is about to receive focus (bubbles).
focusoutUnimplemented (see bug 687787)	FocusEvent	DOM L3	An element is about to lose focus (bubbles).
fullscreenchange	Event	Full Screen	An element was turned to fullscreen mode or back to normal mode.
fullscreenerror	Event	Full Screen	It was impossible to switch to fullscreen mode for technical reasons or because the permission was denied.
gotpointercapture	PointerEvent	Pointer Events	Element receives pointer capture.
hashchange	HashChangeEvent	HTML5	The fragment identifier of the URL has changed (the part of the URL after the #).
lostpointercapture	PointerEvent	Pointer Events	Element lost pointer capture.
input	Event	HTML5	The value of an element changes or the content of an element with the attribute contenteditable is modified.
invalid	Event	HTML5	A submittable element has been checked and doesn't satisfy its constraints.
keydown	KeyboardEvent	DOM L3	A key is pressed down.
keypress	KeyboardEvent	DOM L3	A key is pressed down and that key normally produces a character value (use input instead).
keyup	KeyboardEvent	DOM L3	A key is released.
languagechange	Event	HTML5.1 The definition of 'NavigatorLanguage.languages' in that specification.	The user's preferred languages have changed.
load	UIEvent	DOM L3	A resource and its dependent resources have finished loading.
load	ProgressEvent	Progress and XMLHttpRequest	Progression has been successful.
loadeddata	Event	HTML5 media	The first frame of the media has finished loading.
loadedmetadata	Event	HTML5 media	The metadata has been loaded.
loadend	ProgressEvent	Progress and XMLHttpRequest	Progress has stopped (after "error", "abort" or "load" have been dispatched).
loadstart	ProgressEvent	Progress and XMLHttpRequest	Progress has begun.
mark	SpeechSynthesisEvent	Web Speech API	The spoken utterance reaches a named SSML "mark" tag.
message	MessageEvent	WebSocket	A message is received through a WebSocket.
message	MessageEvent	Web Workers	A message is received from a Web Worker.
message	MessageEvent	Web Messaging	A message is received from a child (i)frame or a parent window.
message	MessageEvent	Server Sent Events	A message is received through an event source.
message	ServiceWorkerMessageEvent or ExtendableMessageEvent, depending on context.	Service Workers	A message is received from a service worker, or a message is received in a service worker from another context.
mousedown	MouseEvent	DOM L3	A pointing device button (usually a mouse) is pressed on an element.
mouseenter	MouseEvent	DOM L3	A pointing device is moved onto the element that has the listener attached.
mouseleave	MouseEvent	DOM L3	A pointing device is moved off the element that has the listener attached.
mousemove	MouseEvent	DOM L3	A pointing device is moved over an element.
mouseout	MouseEvent	DOM L3	A pointing device is moved off the element that has the listener attached or off one of its children.
mouseover	MouseEvent	DOM L3	A pointing device is moved onto the element that has the listener attached or onto one of its children.
mouseup	MouseEvent	DOM L3	A pointing device button is released over an element.
nomatch	SpeechRecognitionEvent	Web Speech API	The speech recognition service returns a final result with no significant recognition.
notificationclick	NotificationEvent	Notifications API The definition of 'onnotificationclick' in that specification.	A system notification spawned by ServiceWorkerRegistration.showNotification() has been clicked.
noupdate	Event	Offline	The manifest hadn't changed.
obsolete	Event	Offline	The manifest was found to have become a 404 or 410 page, so the application cache is being deleted.
offline	Event	HTML5 offline	The browser has lost access to the network.
online	Event	HTML5 offline	The browser has gained access to the network (but particular websites might be unreachable).
open	Event	WebSocket	A WebSocket connection has been established.
open	Event	Server Sent Events	An event source connection has been established.
orientationchange	Event	Screen Orientation	The orientation of the device (portrait/landscape) has changed
pagehide	PageTransitionEvent	HTML5	A session history entry is being traversed from.
pageshow	PageTransitionEvent	HTML5	A session history entry is being traversed to.
paste	ClipboardEvent	Clipboard	Data has been transferred from the system clipboard to the document.
pause	Event	HTML5 media	Playback has been paused.
pause	SpeechSynthesisEvent	Web Speech API	The utterance is paused part way through.
pointercancel	PointerEvent	Pointer Events	The pointer is unlikely to produce any more events.
pointerdown	PointerEvent	Pointer Events	The pointer enters the active buttons state.
pointerenter	PointerEvent	Pointer Events	Pointing device is moved inside the hit-testing boundary.
pointerleave	PointerEvent	Pointer Events	Pointing device is moved out of the hit-testing boundary.
pointerlockchange	Event	Pointer Lock	The pointer was locked or released.
pointerlockerror	Event	Pointer Lock	It was impossible to lock the pointer for technical reasons or because the permission was denied.
pointermove	PointerEvent	Pointer Events	The pointer changed coordinates.
pointerout	PointerEvent	Pointer Events	The pointing device moved out of hit-testing boundary or leaves detectable hover range.
pointerover	PointerEvent	Pointer Events	The pointing device is moved into the hit-testing boundary.
pointerup	PointerEvent	Pointer Events	The pointer leaves the active buttons state.
play	Event	HTML5 media	Playback has begun.
playing	Event	HTML5 media	Playback is ready to start after having been paused or delayed due to lack of data.
popstate	PopStateEvent	HTML5	A session history entry is being navigated to (in certain cases).
progress	ProgressEvent	Progress and XMLHttpRequest	In progress.
progress	ProgressEvent	Offline	The user agent is downloading resources listed by the manifest.
push	PushEvent	Push API	A Service Worker has received a push message.
pushsubscriptionchange	PushEvent	Push API	A PushSubscription has expired.
ratechange	Event	HTML5 media	The playback rate has changed.
readystatechange	Event	HTML5 and XMLHttpRequest	The readyState attribute of a document has changed.
reset	Event	DOM L2, HTML5	A form is reset.
resize	UIEvent	DOM L3	The document view has been resized.
resourcetimingbufferfull	Performance	Resource Timing	The browser's resource timing buffer is full.
result	SpeechRecognitionEvent	Web Speech API	The speech recognition service returns a result — a word or phrase has been positively recognized and this has been communicated back to the app.
resume	SpeechSynthesisEvent	Web Speech API	A paused utterance is resumed.
scroll	UIEvent	DOM L3	The document view or an element has been scrolled.
seeked	Event	HTML5 media	A seek operation completed.
seeking	Event	HTML5 media	A seek operation began.
select	UIEvent	DOM L3	Some text is being selected.
selectstart	Event	Selection API	A selection just started.
selectionchange	Event	Selection API	The selection in the document has been changed.
show	MouseEvent	HTML5	A contextmenu event was fired on/bubbled to an element that has a contextmenu attribute
soundend	Event	Web Speech API	Any sound — recognisable speech or not — has stopped being detected.
soundstart	Event	Web Speech API	Any sound — recognisable speech or not — has been detected.
speechend	Event	Web Speech API	Speech recognised by the speech recognition service has stopped being detected.
speechstart	Event	Web Speech API	Sound that is recognised by the speech recognition service as speech has been detected.
stalled	Event	HTML5 media	The user agent is trying to fetch media data, but data is unexpectedly not forthcoming.
start	Event	Web Speech API	The speech recognition service has begun listening to incoming audio with intent to recognize grammars associated with the current SpeechRecognition.
start	SpeechSynthesisEvent	Web Speech API	The utterance has begun to be spoken.
storage	StorageEvent	Web Storage	A storage area (localStorage or sessionStorage) has changed.
submit	Event	DOM L2, HTML5	A form is submitted.
success	Event	IndexedDB	A request successfully completed.
suspend	Event	HTML5 media	Media data loading has been suspended.
timeout	ProgressEvent	XMLHttpRequest
timeupdate	Event	HTML5 media	The time indicated by the currentTime attribute has been updated.
touchcancel	TouchEvent	Touch Events	A touch point has been disrupted in an implementation-specific manners (too many touch points for example).
touchend	TouchEvent	Touch Events	A touch point is removed from the touch surface.
touchmove	TouchEvent	Touch Events	A touch point is moved along the touch surface.
touchstart	TouchEvent	Touch Events	A touch point is placed on the touch surface.
transitionend	TransitionEvent	CSS Transitions	A CSS transition has completed.
unload	UIEvent	DOM L3	The document or a dependent resource is being unloaded.
updateready	Event	Offline	The resources listed in the manifest have been newly redownloaded, and the script can use swapCache() to switch to the new cache.
upgradeneeded		IndexedDB	An attempt was made to open a database with a version number higher than its current version. A versionchange transaction has been created.
userproximity	UserProximityEvent	Proximity Events	Fresh data is available from a proximity sensor (indicates whether the nearby object is near the device or not).
voiceschanged	Event	Web Speech API	The list of SpeechSynthesisVoice objects that would be returned by the SpeechSynthesis.getVoices() method has changed (when the voiceschanged event fires.)
versionchange		IndexedDB	A versionchange transaction completed.
visibilitychange	Event	Page visibility	The content of a tab has become visible or has been hidden.
volumechange	Event	HTML5 media	The volume has changed.
vrdisplayconnected	Event	WebVR API	A compatible VR device has been connected to the computer.
vrdisplaydisconnected	Event	WebVR API	A compatible VR device has been disconnected from the computer.
vrdisplaypresentchange	Event	WebVR API	The presenting state of a VR device has changed — i.e. from presenting to not presenting, or vice versa.
waiting	Event	HTML5 media	Playback has stopped because of a temporary lack of data.
wheel	WheelEvent	DOM L3	A wheel button of a pointing device is rotated in any direction.