提供
NG_VALUE_ACCESSOR
ControlValueAccessor
interface
,意思是你拿着
registerOnTouched(fn)
onTouched = () => void;
constructor() {
this.form.statusChanges.pipe(
first(() => this.form.touched),
).subscribe(
() => this.onTouched()
)
}
registerOnTouched(fn) {
this.onTouched = fn;
}