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Showing content from https://webplatform.github.io/docs/dom/WheelEvent/initWheelEvent below:

initWheelEvent · WebPlatform Docs

Initializes a new WheelEvent that the createEvent method created.

Method of dom/WheelEventdom/WheelEvent

 event.initWheelEvent();

Data-type

String

The name of the event. Sets the value for the type property.

Data-type

Boolean

Whether the event propagates upward. Sets the value for the bubbles property.

Data-type

Boolean

Whether the event is cancelable and so preventDefault can be called. Sets the value for the cancelable property.

Data-type

Object

The window on which this event is occurring. Sets the value for the view property.

Data-type

Number

Specifies additional information. This value is returned in the detail property of the event.

Data-type

Number

The x-coordinate of the mouse pointer, relative to the upper-left corner of the screen. Sets the value for the screenX property,

Data-type

Number

The y-coordinate of the mouse pointer, relative to the upper-left corner of the screen. Sets the value for the screenY property.

Data-type

Number

The x-coordinate of the mouse pointer, relative to the upper-left corner of the browser’s client area. Sets the value for the clientX property.

Data-type

any

The y-coordinate of the mouse pointer, relative to the upper-left corner of the browser’s client area. Sets the value for the clientY property.

Data-type

Number

The mouse button that caused the event. Sets the value for the button property (see the property page for common values).

Data-type

DOM Node

A secondary element that is involved in the event. Sets the value for the relatedTarget property.

Data-type

String

A space-separated list of any of the following values:

• Alt - The left or right Alt key.
• AltGraph - The Ctrl and Alt keys.
• CapsLock - The Caps Lock toggle.
• Control - The left or right Ctrl key.
• Meta - The Meta/Control key.
• NumLock - The Num Lock toggle.
• ScrollLock - The Scroll Lock toggle.
• Shift - The left or right Shift key.
• Fn
• OS
• SymbolLock

Other implementation specific options may be supported. For example -

• Win (on Microsoft Windows) - The left or right Windows logo key.
• Scroll - The Scroll Lock toggle.

Data-type

Number

The distance that the mouse wheel has rotated around the x-axis. Sets the value for the deltaX property.

Data-type

Number

The distance that the mouse wheel has rotated around the y-axis. Sets the value for the deltaY property.

Data-type

Number

The distance that the mouse wheel has rotated around the z-axis. Sets the value for the deltaZ property.

Data-type

Number

The delta mode of the event. Sets the value for the deltaMode property (see the property page for common values).

No return value

function dispatchWheelEvent(){
        var evt=document.createEvent('WheelEvent');
        var theform=document.forms.dispatch;
        
        evt.initWheelEvent('wheel',
                            theform.chkcanbubble.checked,
                            theform.chkcancellable.checked,
                            eval(theform.view.value),
                            theform.detail.value,
                            theform.screenx.value,
                            theform.screeny.value,
                            theform.clientx.value,
                            theform.clienty.value,
                            theform.button.value,
                            null,
                            theform.modifierlist.value,
                            theform.deltax.value,
                            theform.deltay.value,
                            theform.deltaz.value,
                            theform.cbodeltamode.value);


        window.dispatchEvent(evt);
   }

DOM Level 3 Events

Working Draft

• Microsoft Developer Network: [initWheelEvent Article]

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