Components / Dropdowns / API

ComboBoxComponent

Represents the Kendo UI ComboBox component for Angular.

@Component({
selector: 'my-app',
template: `
 <kendo-combobox [data]="listItems">
 </kendo-combobox>
`
})
class AppComponent {
  public listItems: Array<string> = ["Item 1", "Item 2", "Item 3", "Item 4"];
}

Export Name

Accessible in templates as #kendoComboBoxInstance="kendoComboBox"

Inputs

allowCustom boolean

Specifies whether the ComboBox allows user-defined values that are not present in the dataset.
The default value is false.
For more information, refer to the article on custom values.

clearButton boolean

If set to true, renders a button on hovering over the component. Clicking this button resets the value of the component to undefined and triggers the change event.

disabled boolean

Sets the disabled state of the component.

filterable boolean

Enables the filtering functionality. If set to true, the component emits the filterChange event.

listHeight number

Sets the height of the suggestions list. By default, listHeight is 200px.

The listHeight property affects only the list of suggestions and not the whole popup container.
To set the height of the popup container, use popupSettings.height.

loading boolean

Sets and gets the loading state of the ComboBox.

placeholder string

The hint displayed when the component is empty.

readonly boolean

Sets the read-only state of the component.

suggest boolean

Enables the auto-completion of the text based on the first data item.

tabindex number

Specifies the tabindex of the component.

textField string

Sets the data item field that represents the item text. If the data contains only primitive values, do not define it.

valueField string

Sets the data item field that represents the item value. If the data contains only primitive values, do not define it.

valuePrimitive boolean

Specifies the type of the selected value. If set to true, the selected value has to be of the primitive type.

For more details, refer to the section on the valuePrimitive property.

data any

Sets the data of the ComboBox.

The data has to be provided in an array-like list.

itemDisabled ItemDisabledFn

Defines a Boolean function that is executed for each data item in the component
(see examples). Determines whether the item will be disabled.

popupSettings PopupSettings

Configures the popup of the ComboBox.

The available options are:

animate: Boolean—Controls the popup animation. By default, the open and close animations are enabled.
width: Number | String—Sets the width of the popup container. By default, the width of the host element is used If set to auto, the component automatically adjusts the width of the popup, so no item labels are wrapped.
height: Number—Sets the height of the popup container.
popupClass: String—Specifies a list of CSS classes that are used to style the popup.
appendTo: "root" | "component" | ViewContainerRef—Specifies the component to which the popup will be appended.

value any

Sets the value of the ComboBox. It can either be of the primitive (string, numbers) or of the complex (objects) type. To define the type, use the valuePrimitive option.

All selected values which are not present in the dataset are considered custom values. When the Enter key is pressed or the component loses focus, custom values get dismissed unless allowCustom is set to true.

valueNormalizer (text: Observable) => Observable

A user-defined callback which returns normalized custom values. Typically used when the data items are different from type string.

import { map } from 'rxjs/operators/map';

@Component({
selector: 'my-app',
template: `
  <kendo-combobox
      [allowCustom]="true"
      [data]="listItems"
      [textField]="'text'"
      [valueField]="'value'"
      [valueNormalizer]="valueNormalizer"
      (valueChange)="onValueChange($event)"
  >
  </kendo-combobox>
`
})

class AppComponent {
  public listItems: Array<{ text: string, value: number }> = [
      { text: "Small", value: 1 },
      { text: "Medium", value: 2 },
      { text: "Large", value: 3 }
  ];

  public onValueChange(value) {
      console.log("valueChange : ", value);
  }

  public valueNormalizer = (text$: Observable<string>) => text$.pipe(map((text: string) => {
     return { ProductID: null, ProductName: text };
  }));

}

Fields

isOpen boolean

Returns the current open state of the popup.

Events

close EventEmitter

Fires each time the popup is about to close.
This event is preventable. If you cancel it, the popup will remain open.

filterChange EventEmitter

Fires each time the user types in the input field.
You can filter the source based on the passed filtration value.
For more details, refer to the example on events.

blur EventEmitter

Fires each time the ComboBox gets blurred.

focus EventEmitter

Fires each time the user focuses the ComboBox.

open EventEmitter

Fires each time the popup is about to open.
This event is preventable. If you cancel it, the popup will remain closed.

selectionChange EventEmitter

Fires each time an item selection is changed.
For more details, refer to the example on events.

Fires each time the value is changed—
when the component is blurred or the value is cleared through the Clear button.
For more details, refer to the example on events.
When the value of the component is programmatically changed to ngModel or formControl
through its API or form binding, the valueChange event is not triggered because it
might cause a mix-up with the built-in valueChange mechanisms of the ngModel or formControl bindings.

open boolean

The state of the popup.