MarsiBarsi

import {DOCUMENT} from '@angular/common';
import {inject, InjectionToken} from '@angular/core';

export const WINDOW = new InjectionToken<Window>(
    'An abstraction over global window object',
    {
        factory: () => {
            const {defaultView} = inject(DOCUMENT);

            if (!defaultView) {

MarsiBarsi

import {AbstractControl, FormArray, FormGroup} from '@angular/forms';

export function markControlAsTouchedAndValidate(control: AbstractControl) {
    if (control instanceof FormArray) {
        control.controls.forEach(nestedControl => {
            markControlAsTouchedAndValidate(nestedControl);
        });

        return;
    }

MarsiBarsi

export class ReplayControlValueChanges<T> extends Observable<T> {
    constructor(control: AbstractControl | AbstractControlDirective) {
        super(subscriber => {
            if (!control.valueChanges) {
                throw new Error('Control does not have valueChanges');
            }

            control.valueChanges.pipe(startWith(control.value)).subscribe(subscriber);
        });
    }

MarsiBarsi

export function watch<T>(
    changeDetectorRef: ChangeDetectorRef,
): MonoTypeOperatorFunction<T> {
    return (source: Observable<T>) =>
        source.pipe(
            tap(() => {
                changeDetectorRef.markForCheck();
            }),
        );
}