SelectMultipleControlValueAccessor
The ControlValueAccessor for writing multi-select control values and listening to multi-select
control changes. The value accessor is used by the FormControlDirective, FormControlName, and
NgModel directives.
See also
Exported from
Selectors
select[multiple][formControlName]select[multiple][formControl]select[multiple][ngModel]
Properties
| Property | Description |
|---|---|
@Input()
|
Write-Only
Tracks the option comparison algorithm for tracking identities when checking for changes. |
Description
Using a multi-select control
The follow example shows you how to use a multi-select control with a reactive form.
const countryControl = new FormControl();
<select multiple name="countries" [formControl]="countryControl">
<option *ngFor="let country of countries" [ngValue]="country">
{{ country.name }}
</option>
</select>
Customizing option selection
To customize the default option comparison algorithm, <select> supports compareWith input.
See the SelectControlValueAccessor for usage.