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Javascript - HTML DOM Events

HTML DOM Events

HTML DOM events allow JavaScript to register different event handlers on elements in an HTML document.

Events are normally used in combination with functions, and the function will not be executed before the event occurs (such as when a user clicks a button).

Tip: The event model was standardized by the W3C in DOM Level 2

Mouse Events

Event
Description
DOM
onclick
The event occurs when the user clicks on an element
2
oncontextmenu
The event occurs when the user right-clicks on an element to open a context menu
3
ondblclick
The event occurs when the user double-clicks on an element
2
onmousedown
The event occurs when the user presses a mouse button over an element
2
onmouseenter
The event occurs when the pointer is moved onto an element
2
onmouseleave
The event occurs when the pointer is moved out of an element
2
onmousemove
The event occurs when the pointer is moving while it is over an element
2
onmouseover
The event occurs when the pointer is moved onto an element, or onto one of its children
2
onmouseout
The event occurs when a user moves the mouse pointer out of an element, or out of one of its children
2
onmouseup
The event occurs when a user releases a mouse button over an element
2

Keyboard Events

Event
Description
DOM
onkeydown
The event occurs when the user is pressing a key
2
onkeypress
The event occurs when the user presses a key
2
onkeyup
The event occurs when the user releases a key
2

Frame/Object Events

Event
Description
DOM
onabort
The event occurs when the loading of a resource has been aborted
2
onbeforeunload
The event occurs before the document is about to be unloaded
2
onerror
The event occurs when an error occurs while loading an external file
2
onhashchange
The event occurs when there has been changes to the anchor part of a URL
3
onload
The event occurs when an object has loaded
2
onpageshow
The event occurs when the user navigates to a webpage
3
onpagehide
The event occurs when the user navigates away from a webpage
3
onresize
The event occurs when the document view is resized
2
onscroll
The event occurs when an element's scrollbar is being scrolled
2
onunload
The event occurs once a page has unloaded (for <body>)
2

Form Events

Event
Description
DOM
onblur
The event occurs when an element loses focus
2
onchange
The event occurs when the content of a form element, the selection, or the checked state have changed (for <input>, <keygen>, <select>, and <textarea>)
2
onfocus
The event occurs when an element gets focus
2
onfocusin
The event occurs when an element is about to get focus
2
onfocusout
The event occurs when an element is about to lose focus
2
oninput
The event occurs when an element gets user input
3
oninvalid
The event occurs when an element is invalid
3
onreset
The event occurs when a form is reset
2
onsearch
The event occurs when the user writes something in a search field (for <input="search">)
3
onselect
The event occurs after the user selects some text (for <input> and <textarea>)
2
onsubmit
The event occurs when a form is submitted
2

Drag Events

Event
Description
DOM
ondrag
The event occurs when an element is being dragged
3
ondragend
The event occurs when the user has finished dragging an element
3
ondragenter
The event occurs when the dragged element enters the drop target
3
ondragleave
The event occurs when the dragged element leaves the drop target
3
ondragover
The event occurs when the dragged element is over the drop target
3
ondragstart
The event occurs when the user starts to drag an element
3
ondrop
The event occurs when the dragged element is dropped on the drop target
3

Clipboard Events

Event
Description
DOM
oncopy
The event occurs when the user copies the content of an element
oncut
The event occurs when the user cuts the content of an element
onpaste
The event occurs when the user pastes some content in an element

Print Events

Event
Description
DOM
onafterprint
The event occurs when a page has started printing, or if the print dialogue box has been closed
3
onbeforeprint
The event occurs when a page is about to be printed
3

Media Events

Event
Description
DOM
onabort
The event occurs when the loading of a media is aborted
3
oncanplay
The event occurs when the browser can start playing the media (when it has buffered enough to begin)
3
oncanplaythrough
The event occurs when the browser can play through the media without stopping for buffering
3
ondurationchange
The event occurs when the duration of the media is changed
3
onemptied
The event occurs when something bad happens and the media file is suddenly unavailable (like unexpectedly disconnects)
3
onended
The event occurs when the media has reach the end (useful for messages like "thanks for listening")
3
onerror
The event occurs when an error occurred during the loading of a media file
3
onloadeddata
The event occurs when media data is loaded
3
onloadedmetadata
The event occurs when meta data (like dimensions and duration) are loaded
3
onloadstart
The event occurs when the browser starts looking for the specified media
3
onpause
The event occurs when the media is paused either by the user or programmatically
3
onplay
The event occurs when the media has been started or is no longer paused
3
onplaying
The event occurs when the media is playing after having been paused or stopped for buffering
3
onprogress
The event occurs when the browser is in the process of getting the media data (downloading the media)
3
onratechange
The event occurs when the playing speed of the media is changed
3
onseeked
The event occurs when the user is finished moving/skipping to a new position in the media
3
onseeking
The event occurs when the user starts moving/skipping to a new position in the media
3
onstalled
The event occurs when the browser is trying to get media data, but data is not available
3
onsuspend
The event occurs when the browser is intentionally not getting media data
3
ontimeupdate
The event occurs when the playing position has changed (like when the user fast forwards to a different point in the media)
3
onvolumechange
The event occurs when the volume of the media has changed (includes setting the volume to "mute")
3
onwaiting
The event occurs when the media has paused but is expected to resume (like when the media pauses to buffer more data)
3

Animation Events

Event
Description
DOM
animationend
The event occurs when a CSS animation has completed
3
animationiteration
The event occurs when a CSS animation is repeated
3
animationstart
The event occurs when a CSS animation has started
3

Transition Events

Event
Description
DOM
transitionend
The event occurs when a CSS transition has completed
3

Server-Sent Events

Event
Description
DOM
onerror
The event occurs when an error occurs with the event source
onmessage
The event occurs when a message is received through the event source
onopen
The event occurs when a connection with the event source is opened

Misc Events

Event
Description
DOM
onmessage
The event occurs when a message is received through or from an object (WebSocket, Web Worker, Event Source or a child frame or a parent window)
3
onmousewheel
Deprecated. Use the onwheel event instead
ononline
The event occurs when the browser starts to work online
3
onoffline
The event occurs when the browser starts to work offline
3
onpopstate
The event occurs when the window's history changes
3
onshow
The event occurs when a <menu> element is shown as a context menu
3
onstorage
The event occurs when a Web Storage area is updated
3
ontoggle
The event occurs when the user opens or closes the <details> element
3
onwheel
The event occurs when the mouse wheel rolls up or down over an element
3

Touch Events

Event
Description
DOM
ontouchcancel
The event occurs when the touch is interrupted
ontouchend
The event occurs when a finger is removed from a touch screen
ontouchmove
The event occurs when a finger is dragged across the screen
ontouchstart
The event occurs when a finger is placed on a touch screen

Event Object

Constants

Constant
Description
DOM
CAPTURING_PHASE
The current event phase is the capture phase (1)
1
AT_TARGET
The current event is in the target phase, i.e. it is being evaluated at the event target (2)
2
BUBBLING_PHASE
The current event phase is the bubbling phase (3)
3

Properties

Property
Description
DOM
bubbles
Returns whether or not a specific event is a bubbling event
2
cancelable
Returns whether or not an event can have its default action prevented
2
currentTarget
Returns the element whose event listeners triggered the event
2
defaultPrevented
Returns whether or not the preventDefault() method was called for the event
3
eventPhase
Returns which phase of the event flow is currently being evaluated
2
isTrusted
Returns whether or not an event is trusted
3
target
Returns the element that triggered the event
2
timeStamp
Returns the time (in milliseconds relative to the epoch) at which the event was created
2
type
Returns the name of the event
2
view
Returns a reference to the Window object where the event occured
2

Methods

Method
Description
DOM
preventDefault()
Cancels the event if it is cancelable, meaning that the default action that belongs to the event will not occur
2
stopImmediatePropagation()
Prevents other listeners of the same event from being called
3
stopPropagation()
Prevents further propagation of an event during event flow
2

MouseEvent Object

Property
Description
DOM
altKey
Returns whether the "ALT" key was pressed when the mouse event was triggered
2
button
Returns which mouse button was pressed when the mouse event was triggered
2
buttons
Returns which mouse buttons were pressed when the mouse event was triggered
3
clientX
Returns the horizontal coordinate of the mouse pointer, relative to the current window, when the mouse event was triggered
2
clientY
Returns the vertical coordinate of the mouse pointer, relative to the current window, when the mouse event was triggered
2
ctrlKey
Returns whether the "CTRL" key was pressed when the mouse event was triggered
2
detail
Returns a number that indicates how many times the mouse was clicked
2
metaKey
Returns whether the "META" key was pressed when an event was triggered
2
pageX
Returns the horizontal coordinate of the mouse pointer, relative to the document, when the mouse event was triggered
pageY
Returns the vertical coordinate of the mouse pointer, relative to the document, when the mouse event was triggered
relatedTarget
Returns the element related to the element that triggered the mouse event
2
screenX
Returns the horizontal coordinate of the mouse pointer, relative to the screen, when an event was triggered
2
screenY
Returns the vertical coordinate of the mouse pointer, relative to the screen, when an event was triggered
2
shiftKey
Returns whether the "SHIFT" key was pressed when an event was triggered
2
which
Returns which mouse button was pressed when the mouse event was triggered
2

KeyboardEvent Object

Property
Description
DOM
altKey
Returns whether the "ALT" key was pressed when the key event was triggered
2
ctrlKey
Returns whether the "CTRL" key was pressed when the key event was triggered
2
charCode
Returns the Unicode character code of the key that triggered the onkeypress event
2
key
Returns the key value of the key represented by the event
3
keyCode
Returns the Unicode character code of the key that triggered the onkeypress event, or the Unicode key code of the key that triggered the onkeydown or onkeyup event
2
location
Returns the location of a key on the keyboard or device
3
metaKey
Returns whether the "meta" key was pressed when the key event was triggered
2
shiftKey
Returns whether the "SHIFT" key was pressed when the key event was triggered
2
which
Returns the Unicode character code of the key that triggered the onkeypress event, or the Unicode key code of the key that triggered the onkeydown or onkeyup event
2

HashChangeEvent Object

Property
Description
DOM
newURL
Returns the URL of the document, after the hash has been changed

oldURL
Returns the URL of the document, before the hash was changed

PageTransitionEvent Object

Property
Description
DOM
persisted
Returns whether the webpage was cached by the browser

FocusEvent Object

Property
Description
DOM
relatedTarget
Returns the element related to the element that triggered the event
3

AnimationEvent Object

Property
Description
DOM
animationName
Returns the name of the animation

elapsedTime
Returns the number of seconds an animation has been running

TransitionEvent Object

Property
Description
DOM
propertyName
Returns the name of the CSS property associated with the transition

elapsedTime
Returns the number of seconds a transition has been running

WheelEvent Object

Property
Description
DOM
deltaX
Returns the horizontal scroll amount of a mouse wheel (x-axis)
3
deltaY
Returns the vertical scroll amount of a mouse wheel (y-axis)
3
deltaZ
Returns the scroll amount of a mouse wheel for the z-axis
3
deltaMode
Returns a number that represents the unit of measurements for delta values (pixels, lines or pages)
3

Javascript - HTML DOM Events Javascript - HTML DOM Events Reviewed by Programming Buddy Club on 9:13 PM Rating: 5

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