MouseEvent
The MouseEvent
interface represents events that occur due to the user interacting with a pointing device (such as a mouse). Common events using this interface include click
, dblclick
(en-US), mouseup
(en-US), mousedown
.
MouseEvent
derives from UIEvent
, which in turn derives from Event
. Though the MouseEvent.initMouseEvent()
method is kept for backward compatibility, creating of a MouseEvent
object should be done using the MouseEvent()
(en-US) constructor.
Several more specific events derivate from MouseEvent
: WheelEvent
and DragEvent
.
Constructor
MouseEvent()
(en-US)-
Creates a
MouseEvent
object.
Properties
This interface also inherits properties of its parents, UIEvent
and Event
.
MouseEvent.altKey
(en-US) Read only-
Returns
true
if the alt key was down when the mouse event was fired. -
The button number that was pressed when the mouse event was fired.
-
The buttons being pressed when the mouse event was fired
MouseEvent.clientX
(en-US) Read only-
The X coordinate of the mouse pointer in local (DOM content) coordinates.
MouseEvent.clientY
(en-US) Read only-
The Y coordinate of the mouse pointer in local (DOM content) coordinates.
MouseEvent.ctrlKey
(en-US) Read only-
Returns
true
if the control key was down when the mouse event was fired. MouseEvent.metaKey
(en-US) Read only-
Returns
true
if the meta key was down when the mouse event was fired. MouseEvent.movementX
(en-US) Read only-
The X coordinate of the mouse pointer relative to the position of the last
mousemove
(en-US) event. MouseEvent.movementY
(en-US) Read only-
The Y coordinate of the mouse pointer relative to the position of the last
mousemove
(en-US) event. MouseEvent.region
(en-US) Read only-
Returns the id of the hit region affected by the event. If no hit region is affected,
null
is returned. -
The secondary target for the event, if there is one.
MouseEvent.screenX
(en-US) Read only-
The X coordinate of the mouse pointer in global (screen) coordinates.
MouseEvent.screenY
(en-US) Read only-
The Y coordinate of the mouse pointer in global (screen) coordinates.
MouseEvent.shiftKey
Read only-
Returns
true
if the shift key was down when the mouse event was fired. MouseEvent.which
(en-US) Non-standard Read only-
The button being pressed when the mouse event was fired.
MouseEvent.mozPressure
Non-standard Read only-
The amount of pressure applied to a touch or tablet device when generating the event; this value ranges between
0.0
(minimum pressure) and1.0
(maximum pressure). MouseEvent.mozInputSource
(en-US) Non-standard Read only-
The type of device that generated the event (one of the
MOZ_SOURCE_*
constants listed below). This lets you, for example, determine whether a mouse event was generated by an actual mouse or by a touch event (which might affect the degree of accuracy with which you interpret the coordinates associated with the event). The possible values are:Constant name Value Desription MouseEvent.MOZ_SOURCE_UNKNOWN
0 The input device is unknown. MouseEvent.MOZ_SOURCE_MOUSE
1 The event was generated by a mouse (or mouse-like device). MouseEvent.MOZ_SOURCE_PEN
2 The event was generated by a pen on a tablet. MouseEvent.MOZ_SOURCE_ERASER
3 The event was generated by an eraser on a tablet. MouseEvent.MOZ_SOURCE_CURSOR
4 The event was generated by a cursor. MouseEvent.MOZ_SOURCE_TOUCH
5 The event was generated on a touch interface. MouseEvent.MOZ_SOURCE_KEYBOARD
6 The event was generated by a keyboard.
Methods
This interface also inherits methods of its parents, UIEvent
and Event
.
MouseEvent.getModifierState()
(en-US)-
Returns the current state of the specified modifier key. See the
KeyboardEvent.getModifierState
(en-US)() for details. MouseEvent.initMouseEvent()
Obsoleto-
Initializes the value of a
MouseEvent
created. If the event has already being dispatched, this method does nothing.
Example
This example demonstrates simulating a click (that is programmatically generating a click event) on a checkbox using DOM methods.
function simulateClick() {
var evt = new MouseEvent("click", {
bubbles: true,
cancelable: true,
view: window,
});
var cb = document.getElementById("checkbox"); //element to click on
var canceled = !cb.dispatchEvent(evt);
if(canceled) {
// A handler called preventDefault
alert("canceled");
} else {
// None of the handlers called preventDefault
alert("not canceled");
}
}
document.getElementById("button").addEventListener('click', simulateClick);
<p><label><input type="checkbox" id="checkbox"> Checked</label>
<p><button id="button">Click me</button>
Click on the button to see how the sample works:
Especificaciones
Specification |
---|
UI Events # interface-mouseevent |
CSSOM View Module # extensions-to-the-mouseevent-interface |
Pointer Lock 2.0 # extensions-to-the-mouseevent-interface |
Compatibilidad con navegadores
BCD tables only load in the browser
See also
- Its direct parent,
UIEvent
.