@angular/forms

NumberValueAccessor

directive

The ControlValueAccessor for writing a number value and listening to number input changes. The value accessor is used by the FormControlDirective, FormControlName, and NgModel directives.

  
    class NumberValueAccessor {}

Using a number input with a reactive form.

The following example shows how to use a number input with a reactive form.

          const totalCountControl = new FormControl();

          <input type="number" [formControl]="totalCountControl">

writeValue

void

Sets the "value" property on the input element.

@paramvaluenumber

@returnsvoid

registerOnChange

void

Registers a function called when the control value changes.

@paramfn(_: number) => void

@returnsvoid

onChange

(_: any) => void

The registered callback function called when a change or input event occurs on the input element.

onTouched

() => void

The registered callback function called when a blur event occurs on the input element.

setProperty

void

Helper method that sets a property on a target element using the current Renderer implementation.

@paramkeystring

@paramvalueany

@returnsvoid

registerOnTouched

void

Registers a function called when the control is touched.

@paramfn() => void

@returnsvoid

setDisabledState

void

Sets the "disabled" property on the range input element.

@paramisDisabledboolean

@returnsvoid