DropDownTreeModel

23 Sep 20258 minutes to read

Interface for a class DropDownTree

Properties

actionFailure EmitType<Object>

Triggers when the data fetch request from the remote server fails.

beforeOpen EmitType<DdtBeforeOpenEventArgs>

Fires when popup opens before animation.

blur EmitType<Object>

Triggers when the Dropdown Tree input element gets focus-out.

change EmitType<DdtChangeEventArgs>

Triggers when an item in a popup is selected or when the model value is changed by user.

close EmitType<DdtPopupEventArgs>

Fires when popup close after animation completion.

created EmitType<Object>

Triggers when the Dropdown Tree is created successfully.

dataBound EmitType<DdtDataBoundEventArgs>

Triggers when data source is populated in the Dropdown Tree.

destroyed EmitType<Object>

Triggers when the Dropdown Tree is destroyed successfully.

filtering EmitType<DdtFilteringEventArgs>

Triggers on typing a character in the filter bar when the allowFiltering is enabled.

focus EmitType<DdtFocusEventArgs>

Triggers when the Dropdown Tree input element is focused.

keyPress EmitType<DdtKeyPressEventArgs>

Triggers when key press is successful. It helps to customize the operations at key press.

open EmitType<DdtPopupEventArgs>

Fires when popup opens after animation completion.

select EmitType<DdtSelectEventArgs>

Triggers when an item in the popup is selected by the user either with mouse/tap or with keyboard navigation.

actionFailureTemplate string|Function

Specifies the template that renders to the popup list content of the
Dropdown Tree component when the data fetch request from the remote server fails.

allowFiltering boolean

When allowFiltering is set to true, it shows the filter bar (search text box) of the component.
The filter action retrieves matched items through the filtering event based on the characters typed in the search text box.
If no match is found, the value of the noRecordsTemplate property will be displayed.

allowMultiSelection boolean

Enables or disables the multi-selection of items. To select multiple items:

Select the items by holding down the Ctrl key when clicking on the items.
Select consecutive items by clicking the first item to select and hold down the Shift key and click the last item to select.

changeOnBlur boolean

By default, the Dropdown Tree component fires the change event while focusing out the component.
If you want to fire the change event on every value selection and remove, then disable this property.

cssClass string

Specifies the CSS classes to be added with the root and popup element of the Dropdown Tree component.
that allows customization of appearance.

customTemplate string|Function

This property is used to customize the display text of the selected items in the Dropdown Tree. The given custom template is
added to the input instead of the selected item text in the Dropdown Tree when the multi-selection or checkbox support is enabled.

delimiterChar string

Defines the value separator character in the input element when multi-selection or checkbox is enabled in the Dropdown Tree.
The delimiter character is applicable only for default and delimiter visibility modes.

destroyPopupOnHide boolean

Specifies whether to destroy the popup or to maintain it in DOM when it is closed.
When this property is set to false, then the popup will not be removed from DOM once it is closed.

enableHtmlSanitizer boolean

Specifies whether to display or remove the untrusted HTML values in the Dropdown Tree component.
If ‘enableHtmlSanitizer’ set to true, the component will sanitize any suspected untrusted strings and scripts before rendering them.

enablePersistence boolean

Enable or disable persisting component’s state between page reloads.

enableRtl boolean

Enable or disable rendering component in right to left direction.

enabled boolean

Specifies a value that indicates whether the Dropdown Tree component is enabled or not.

fields FieldsModel

Specifies the data source and mapping fields to render Dropdown Tree items.

filterBarPlaceholder string

Accepts the value to be displayed as a watermark text on the filter bar.

filterType TreeFilterType

Determines on which filter type, the component needs to be considered on search action.
The TreeFilterType and its supported data types are,

TreeFilterType	Description	Supported Types
StartsWith	Checks whether a value begins with the specified value.	String
EndsWith	Checks whether a value ends with the specified value.	String
Contains	Checks whether a value contains with specified value.	String

The default value set to StartsWith, all the suggestion items which starts with typed characters to listed in the
suggestion popup.

floatLabelType FloatLabelType

Specifies whether to display the floating label above the input element.
Possible values are:

Never: The label will never float in the input when the placeholder is available.
Always: The floating label will always float above the input.
Auto: The floating label will float above the input after focusing or entering a value in the input.

footerTemplate string|Function

Specifies the template that renders a customized footer container at the bottom of the pop-up list.
By default, the footerTemplate will be null and there will be no footer container for the pop-up list.

headerTemplate string|Function

Specifies the template that renders a customized header container at the top of the pop-up list.
By default, the headerTemplate will be null and there will be no header container for the pop-up list.

htmlAttributes { : }

Allows additional HTML attributes such as title, name, etc., and accepts n number of attributes in a key-value pair format.

ignoreAccent boolean

When ignoreAccent is set to true, then it ignores the diacritic characters or accents when filtering.

ignoreCase boolean

When set to false, consider the case-sensitive on performing the search to find suggestions. By default, consider the casing.

itemTemplate string|Function

Specifies a template to render customized content for all the items.
If the itemTemplate property is set, the template content overrides the displayed item text.
The property accepts template string
or HTML element ID holding the content.

locale string

Overrides the global culture and localization value for this component. Default global culture is ‘en-US’.

mode Mode

Configures visibility mode for component interaction when allowMultiSelection or checkbox is enabled.
Different modes are:

Box : Selected items will be visualized in chip.
Delimiter : Selected items will be visualized in the text content.
Default : On focus in component will act in the box mode. On blur component will act in the delimiter mode.
Custom : Selected items will be visualized with the given custom template value. The given custom template
is added to the input instead of the selected item text in the Dropdown Tree when the multi-selection or checkbox support is enabled.

noRecordsTemplate string|Function

Specifies the template that renders a customized pop-up list content when there is no data available
to be displayed within the pop-up.

placeholder string

Specifies a short hint that describes the expected value of the Dropdown Tree component.

popupHeight string|number

Specifies the height of the pop-up list.

popupWidth string|number

Specifies the width of the popup list. By default, the popup width sets based on the width of the Dropdown Tree element.

readonly boolean

When set to true, the user interactions on the component will be disabled.

selectAllText string

Specifies the display text for the selectAll checkbox in the pop-up.

showCheckBox boolean

Enables or disables the checkbox option in the Dropdown Tree component.
If enabled, the Checkbox will be displayed next to the expand or collapse icon of the tree items.

showClearButton boolean

Specifies whether to show or hide the clear icon in textbox.
When the clear button is clicked, value, text properties will be reset to null.

showDropDownIcon boolean

Specifies whether to show or hide the Dropdown button.

showSelectAll boolean

Specifies whether to show or hide the selectAll checkbox in the pop-up which allows you to select all the items in the pop-up.

sortOrder SortOrder

Specifies a value that indicates whether the items are sorted in the ascending or descending order, or not sorted at all.
The available types of sort order are,

None - The items are not sorted.
Ascending - The items are sorted in the ascending order.
Descending - The items are sorted in the descending order.

text string

Gets or sets the display text of the selected item which maps the data text field in the component.

treeSettings TreeSettingsModel

Configures the pop-up tree settings.

unSelectAllText string

Specifies the display text for the unselect all checkbox in the pop-up.

value string[]

Gets or sets the value of selected item(s) which maps the data value field in the component.

valueTemplate string|Function

Specifies the way to customize the selected values in the Dropdown Tree component based on application needs. If the valueTemplate property is set, the template content overrides the displayed item text.
The property accepts [template string] (https://ej2.syncfusion.com/documentation/common/template-engine/) or HTML element ID holding the content. The context for the valueTemplate comes from the data object passed to it.

width string|number

Specifies the width of the component. By default, the component width sets based on the width of its parent container.
You can also set the width in pixel values.

wrapText boolean

Defines whether to enable or disable the feature called wrap the selected items into multiple lines when the selected item’s text
content exceeded the input width limit.

zIndex number

Specifies the z-index value of the pop-up element.