React DropDownButton Events

This section describes events that the DropDownButton widget raises.

See Also

buttonClick

Raised when the button is clicked.

Type:

Event

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

DropDownButton

The widget's instance.
element

HTMLElement | jQuery

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.
event

Event (jQuery or EventObject)

The event that caused the function to execute. It is a dxEvent or a jQuery.Event when you use jQuery.
model

Object

The model data. Available only if you use Knockout.
selectedItem

Object

The data of an item selected in the drop-down field or in the selectedItemKey option.

Main article: onButtonClick

See Also

contentReady

Raised when the widget's content is ready.

Type:

Event

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

DropDownButton

The widget's instance.
element

HTMLElement | jQuery

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.
model

Object

The model data. Available only when using Knockout.

Main article: onContentReady.

See Also

disposing

Raised before the widget is disposed of.

Type:

Event

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

DropDownButton

The widget instance.
element

HTMLElement | jQuery

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.
model

Object

The model data. Available only if you use Knockout.

Main article: onDisposing

See Also

initialized

Raised only once, after the widget is initialized.

Type:

Event

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

DropDownButton

The widget's instance.
element

HTMLElement | jQuery

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

Main article: onInitialized

See Also

itemClick

Raised when an item in the drop-down filed is clicked.

Type:

Event

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

DropDownButton

The widget's instance.
element

HTMLElement | jQuery

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.
event

Event (jQuery or EventObject)

The event that caused the function to execute. It is a dxEvent or a jQuery.Event when you use jQuery.
itemData

Object

The clicked item's data.
itemElement

HTMLElement | jQuery

The item's container. It is an HTML Element or a jQuery Element when you use jQuery.
model

Object

The model data. Available only if you use Knockout.

Main article: onItemClick

See Also

optionChanged

Raised after a widget option is changed.

Type:

Event

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
model

Object

The model data. Available only if you use Knockout.
fullName

String

The path to the modified option that includes all parent options.
element

HTMLElement | jQuery

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.
component

DropDownButton

The widget's instance.
name

String

The modified option if it belongs to the first level. Otherwise, the first-level option it is nested into.
value any

The modified option's new value.

Main article: onOptionChanged

See Also

selectionChanged

Raised when an item is selected or selection is canceled.

Type:

Event

Function parameters:
e:

Object

Information about the event.

Object structure:
Name Type Description
component

DropDownButton

The widget's instance.
element

HTMLElement | jQuery

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.
item

Object

The selected item's data.
model

Object

The model data. Available only if you use Knockout.
previousItem

Object

The data of the item selected previously.

Main article: onSelectionChanged

See Also