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1/**
2 * @license
3 * Copyright Google LLC All Rights Reserved.
4 *
5 * Use of this source code is governed by an MIT-style license that can be
6 * found in the LICENSE file at https://angular.io/license
7 */
8import { EventEmitter, ɵRuntimeError as RuntimeError } from '@angular/core';
9import { Subject } from 'rxjs';
10import { asyncValidatorsDroppedWithOptsWarning, missingControlError, missingControlValueError, noControlsError, } from '../directives/reactive_errors';
11import { addValidators, composeAsyncValidators, composeValidators, hasValidator, removeValidators, toObservable, } from '../validators';
12/**
13 * Reports that a control is valid, meaning that no errors exist in the input value.
14 *
15 * @see {@link status}
16 */
17export const VALID = 'VALID';
18/**
19 * Reports that a control is invalid, meaning that an error exists in the input value.
20 *
21 * @see {@link status}
22 */
23export const INVALID = 'INVALID';
24/**
25 * Reports that a control is pending, meaning that async validation is occurring and
26 * errors are not yet available for the input value.
27 *
28 * @see {@link markAsPending}
29 * @see {@link status}
30 */
31export const PENDING = 'PENDING';
32/**
33 * Reports that a control is disabled, meaning that the control is exempt from ancestor
34 * calculations of validity or value.
35 *
36 * @see {@link markAsDisabled}
37 * @see {@link status}
38 */
39export const DISABLED = 'DISABLED';
40/**
41 * Base class for every event sent by `AbstractControl.events()`
42 *
43 * @publicApi
44 */
45export class ControlEvent {
46}
47/**
48 * Event fired when the value of a control changes.
49 *
50 * @publicApi
51 */
52export class ValueChangeEvent extends ControlEvent {
53 constructor(value, source) {
54 super();
55 this.value = value;
56 this.source = source;
57 }
58}
59/**
60 * Event fired when the control's pristine state changes (pristine <=> dirty).
61 *
62 * @publicApi */
63export class PristineChangeEvent extends ControlEvent {
64 constructor(pristine, source) {
65 super();
66 this.pristine = pristine;
67 this.source = source;
68 }
69}
70/**
71 * Event fired when the control's touched status changes (touched <=> untouched).
72 *
73 * @publicApi
74 */
75export class TouchedChangeEvent extends ControlEvent {
76 constructor(touched, source) {
77 super();
78 this.touched = touched;
79 this.source = source;
80 }
81}
82/**
83 * Event fired when the control's status changes.
84 *
85 * @publicApi
86 */
87export class StatusChangeEvent extends ControlEvent {
88 constructor(status, source) {
89 super();
90 this.status = status;
91 this.source = source;
92 }
93}
94/**
95 * Event fired when a form is submitted
96 *
97 * @publicApi
98 */
99export class FormSubmittedEvent extends ControlEvent {
100 constructor(source) {
101 super();
102 this.source = source;
103 }
104}
105/**
106 * Event fired when a form is reset.
107 *
108 * @publicApi
109 */
110export class FormResetEvent extends ControlEvent {
111 constructor(source) {
112 super();
113 this.source = source;
114 }
115}
116/**
117 * Gets validators from either an options object or given validators.
118 */
119export function pickValidators(validatorOrOpts) {
120 return (isOptionsObj(validatorOrOpts) ? validatorOrOpts.validators : validatorOrOpts) || null;
121}
122/**
123 * Creates validator function by combining provided validators.
124 */
125function coerceToValidator(validator) {
126 return Array.isArray(validator) ? composeValidators(validator) : validator || null;
127}
128/**
129 * Gets async validators from either an options object or given validators.
130 */
131export function pickAsyncValidators(asyncValidator, validatorOrOpts) {
132 if (typeof ngDevMode === 'undefined' || ngDevMode) {
133 if (isOptionsObj(validatorOrOpts) && asyncValidator) {
134 console.warn(asyncValidatorsDroppedWithOptsWarning);
135 }
136 }
137 return (isOptionsObj(validatorOrOpts) ? validatorOrOpts.asyncValidators : asyncValidator) || null;
138}
139/**
140 * Creates async validator function by combining provided async validators.
141 */
142function coerceToAsyncValidator(asyncValidator) {
143 return Array.isArray(asyncValidator)
144 ? composeAsyncValidators(asyncValidator)
145 : asyncValidator || null;
146}
147export function isOptionsObj(validatorOrOpts) {
148 return (validatorOrOpts != null &&
149 !Array.isArray(validatorOrOpts) &&
150 typeof validatorOrOpts === 'object');
151}
152export function assertControlPresent(parent, isGroup, key) {
153 const controls = parent.controls;
154 const collection = isGroup ? Object.keys(controls) : controls;
155 if (!collection.length) {
156 throw new RuntimeError(1000 /* RuntimeErrorCode.NO_CONTROLS */, typeof ngDevMode === 'undefined' || ngDevMode ? noControlsError(isGroup) : '');
157 }
158 if (!controls[key]) {
159 throw new RuntimeError(1001 /* RuntimeErrorCode.MISSING_CONTROL */, typeof ngDevMode === 'undefined' || ngDevMode ? missingControlError(isGroup, key) : '');
160 }
161}
162export function assertAllValuesPresent(control, isGroup, value) {
163 control._forEachChild((_, key) => {
164 if (value[key] === undefined) {
165 throw new RuntimeError(1002 /* RuntimeErrorCode.MISSING_CONTROL_VALUE */, typeof ngDevMode === 'undefined' || ngDevMode ? missingControlValueError(isGroup, key) : '');
166 }
167 });
168}
169/**
170 * This is the base class for `FormControl`, `FormGroup`, and `FormArray`.
171 *
172 * It provides some of the shared behavior that all controls and groups of controls have, like
173 * running validators, calculating status, and resetting state. It also defines the properties
174 * that are shared between all sub-classes, like `value`, `valid`, and `dirty`. It shouldn't be
175 * instantiated directly.
176 *
177 * The first type parameter TValue represents the value type of the control (`control.value`).
178 * The optional type parameter TRawValue represents the raw value type (`control.getRawValue()`).
179 *
180 * @see [Forms Guide](guide/forms)
181 * @see [Reactive Forms Guide](guide/forms/reactive-forms)
182 * @see [Dynamic Forms Guide](guide/forms/dynamic-forms)
183 *
184 * @publicApi
185 */
186export class AbstractControl {
187 /**
188 * Initialize the AbstractControl instance.
189 *
190 * @param validators The function or array of functions that is used to determine the validity of
191 * this control synchronously.
192 * @param asyncValidators The function or array of functions that is used to determine validity of
193 * this control asynchronously.
194 */
195 constructor(validators, asyncValidators) {
196 /** @internal */
197 this._pendingDirty = false;
198 /**
199 * Indicates that a control has its own pending asynchronous validation in progress.
200 * It also stores if the control should emit events when the validation status changes.
201 *
202 * @internal
203 */
204 this._hasOwnPendingAsyncValidator = null;
205 /** @internal */
206 this._pendingTouched = false;
207 /** @internal */
208 this._onCollectionChange = () => { };
209 this._parent = null;
210 /**
211 * A control is `pristine` if the user has not yet changed
212 * the value in the UI.
213 *
214 * @returns True if the user has not yet changed the value in the UI; compare `dirty`.
215 * Programmatic changes to a control's value do not mark it dirty.
216 */
217 this.pristine = true;
218 /**
219 * True if the control is marked as `touched`.
220 *
221 * A control is marked `touched` once the user has triggered
222 * a `blur` event on it.
223 */
224 this.touched = false;
225 /**
226 * Exposed as observable, see below.
227 *
228 * @internal
229 */
230 this._events = new Subject();
231 /**
232 * A multicasting observable that emits an event every time the state of the control changes.
233 * It emits for value, status, pristine or touched changes.
234 *
235 * **Note**: On value change, the emit happens right after a value of this control is updated. The
236 * value of a parent control (for example if this FormControl is a part of a FormGroup) is updated
237 * later, so accessing a value of a parent control (using the `value` property) from the callback
238 * of this event might result in getting a value that has not been updated yet. Subscribe to the
239 * `events` of the parent control instead.
240 * For other event types, the events are emitted after the parent control has been updated.
241 *
242 */
243 this.events = this._events.asObservable();
244 /** @internal */
245 this._onDisabledChange = [];
246 this._assignValidators(validators);
247 this._assignAsyncValidators(asyncValidators);
248 }
249 /**
250 * Returns the function that is used to determine the validity of this control synchronously.
251 * If multiple validators have been added, this will be a single composed function.
252 * See `Validators.compose()` for additional information.
253 */
254 get validator() {
255 return this._composedValidatorFn;
256 }
257 set validator(validatorFn) {
258 this._rawValidators = this._composedValidatorFn = validatorFn;
259 }
260 /**
261 * Returns the function that is used to determine the validity of this control asynchronously.
262 * If multiple validators have been added, this will be a single composed function.
263 * See `Validators.compose()` for additional information.
264 */
265 get asyncValidator() {
266 return this._composedAsyncValidatorFn;
267 }
268 set asyncValidator(asyncValidatorFn) {
269 this._rawAsyncValidators = this._composedAsyncValidatorFn = asyncValidatorFn;
270 }
271 /**
272 * The parent control.
273 */
274 get parent() {
275 return this._parent;
276 }
277 /**
278 * A control is `valid` when its `status` is `VALID`.
279 *
280 * @see {@link AbstractControl.status}
281 *
282 * @returns True if the control has passed all of its validation tests,
283 * false otherwise.
284 */
285 get valid() {
286 return this.status === VALID;
287 }
288 /**
289 * A control is `invalid` when its `status` is `INVALID`.
290 *
291 * @see {@link AbstractControl.status}
292 *
293 * @returns True if this control has failed one or more of its validation checks,
294 * false otherwise.
295 */
296 get invalid() {
297 return this.status === INVALID;
298 }
299 /**
300 * A control is `pending` when its `status` is `PENDING`.
301 *
302 * @see {@link AbstractControl.status}
303 *
304 * @returns True if this control is in the process of conducting a validation check,
305 * false otherwise.
306 */
307 get pending() {
308 return this.status == PENDING;
309 }
310 /**
311 * A control is `disabled` when its `status` is `DISABLED`.
312 *
313 * Disabled controls are exempt from validation checks and
314 * are not included in the aggregate value of their ancestor
315 * controls.
316 *
317 * @see {@link AbstractControl.status}
318 *
319 * @returns True if the control is disabled, false otherwise.
320 */
321 get disabled() {
322 return this.status === DISABLED;
323 }
324 /**
325 * A control is `enabled` as long as its `status` is not `DISABLED`.
326 *
327 * @returns True if the control has any status other than 'DISABLED',
328 * false if the status is 'DISABLED'.
329 *
330 * @see {@link AbstractControl.status}
331 *
332 */
333 get enabled() {
334 return this.status !== DISABLED;
335 }
336 /**
337 * A control is `dirty` if the user has changed the value
338 * in the UI.
339 *
340 * @returns True if the user has changed the value of this control in the UI; compare `pristine`.
341 * Programmatic changes to a control's value do not mark it dirty.
342 */
343 get dirty() {
344 return !this.pristine;
345 }
346 /**
347 * True if the control has not been marked as touched
348 *
349 * A control is `untouched` if the user has not yet triggered
350 * a `blur` event on it.
351 */
352 get untouched() {
353 return !this.touched;
354 }
355 /**
356 * Reports the update strategy of the `AbstractControl` (meaning
357 * the event on which the control updates itself).
358 * Possible values: `'change'` | `'blur'` | `'submit'`
359 * Default value: `'change'`
360 */
361 get updateOn() {
362 return this._updateOn ? this._updateOn : this.parent ? this.parent.updateOn : 'change';
363 }
364 /**
365 * Sets the synchronous validators that are active on this control. Calling
366 * this overwrites any existing synchronous validators.
367 *
368 * When you add or remove a validator at run time, you must call
369 * `updateValueAndValidity()` for the new validation to take effect.
370 *
371 * If you want to add a new validator without affecting existing ones, consider
372 * using `addValidators()` method instead.
373 */
374 setValidators(validators) {
375 this._assignValidators(validators);
376 }
377 /**
378 * Sets the asynchronous validators that are active on this control. Calling this
379 * overwrites any existing asynchronous validators.
380 *
381 * When you add or remove a validator at run time, you must call
382 * `updateValueAndValidity()` for the new validation to take effect.
383 *
384 * If you want to add a new validator without affecting existing ones, consider
385 * using `addAsyncValidators()` method instead.
386 */
387 setAsyncValidators(validators) {
388 this._assignAsyncValidators(validators);
389 }
390 /**
391 * Add a synchronous validator or validators to this control, without affecting other validators.
392 *
393 * When you add or remove a validator at run time, you must call
394 * `updateValueAndValidity()` for the new validation to take effect.
395 *
396 * Adding a validator that already exists will have no effect. If duplicate validator functions
397 * are present in the `validators` array, only the first instance would be added to a form
398 * control.
399 *
400 * @param validators The new validator function or functions to add to this control.
401 */
402 addValidators(validators) {
403 this.setValidators(addValidators(validators, this._rawValidators));
404 }
405 /**
406 * Add an asynchronous validator or validators to this control, without affecting other
407 * validators.
408 *
409 * When you add or remove a validator at run time, you must call
410 * `updateValueAndValidity()` for the new validation to take effect.
411 *
412 * Adding a validator that already exists will have no effect.
413 *
414 * @param validators The new asynchronous validator function or functions to add to this control.
415 */
416 addAsyncValidators(validators) {
417 this.setAsyncValidators(addValidators(validators, this._rawAsyncValidators));
418 }
419 /**
420 * Remove a synchronous validator from this control, without affecting other validators.
421 * Validators are compared by function reference; you must pass a reference to the exact same
422 * validator function as the one that was originally set. If a provided validator is not found,
423 * it is ignored.
424 *
425 * @usageNotes
426 *
427 * ### Reference to a ValidatorFn
428 *
429 * ```
430 * // Reference to the RequiredValidator
431 * const ctrl = new FormControl<string | null>('', Validators.required);
432 * ctrl.removeValidators(Validators.required);
433 *
434 * // Reference to anonymous function inside MinValidator
435 * const minValidator = Validators.min(3);
436 * const ctrl = new FormControl<string | null>('', minValidator);
437 * expect(ctrl.hasValidator(minValidator)).toEqual(true)
438 * expect(ctrl.hasValidator(Validators.min(3))).toEqual(false)
439 *
440 * ctrl.removeValidators(minValidator);
441 * ```
442 *
443 * When you add or remove a validator at run time, you must call
444 * `updateValueAndValidity()` for the new validation to take effect.
445 *
446 * @param validators The validator or validators to remove.
447 */
448 removeValidators(validators) {
449 this.setValidators(removeValidators(validators, this._rawValidators));
450 }
451 /**
452 * Remove an asynchronous validator from this control, without affecting other validators.
453 * Validators are compared by function reference; you must pass a reference to the exact same
454 * validator function as the one that was originally set. If a provided validator is not found, it
455 * is ignored.
456 *
457 * When you add or remove a validator at run time, you must call
458 * `updateValueAndValidity()` for the new validation to take effect.
459 *
460 * @param validators The asynchronous validator or validators to remove.
461 */
462 removeAsyncValidators(validators) {
463 this.setAsyncValidators(removeValidators(validators, this._rawAsyncValidators));
464 }
465 /**
466 * Check whether a synchronous validator function is present on this control. The provided
467 * validator must be a reference to the exact same function that was provided.
468 *
469 * @usageNotes
470 *
471 * ### Reference to a ValidatorFn
472 *
473 * ```
474 * // Reference to the RequiredValidator
475 * const ctrl = new FormControl<number | null>(0, Validators.required);
476 * expect(ctrl.hasValidator(Validators.required)).toEqual(true)
477 *
478 * // Reference to anonymous function inside MinValidator
479 * const minValidator = Validators.min(3);
480 * const ctrl = new FormControl<number | null>(0, minValidator);
481 * expect(ctrl.hasValidator(minValidator)).toEqual(true)
482 * expect(ctrl.hasValidator(Validators.min(3))).toEqual(false)
483 * ```
484 *
485 * @param validator The validator to check for presence. Compared by function reference.
486 * @returns Whether the provided validator was found on this control.
487 */
488 hasValidator(validator) {
489 return hasValidator(this._rawValidators, validator);
490 }
491 /**
492 * Check whether an asynchronous validator function is present on this control. The provided
493 * validator must be a reference to the exact same function that was provided.
494 *
495 * @param validator The asynchronous validator to check for presence. Compared by function
496 * reference.
497 * @returns Whether the provided asynchronous validator was found on this control.
498 */
499 hasAsyncValidator(validator) {
500 return hasValidator(this._rawAsyncValidators, validator);
501 }
502 /**
503 * Empties out the synchronous validator list.
504 *
505 * When you add or remove a validator at run time, you must call
506 * `updateValueAndValidity()` for the new validation to take effect.
507 *
508 */
509 clearValidators() {
510 this.validator = null;
511 }
512 /**
513 * Empties out the async validator list.
514 *
515 * When you add or remove a validator at run time, you must call
516 * `updateValueAndValidity()` for the new validation to take effect.
517 *
518 */
519 clearAsyncValidators() {
520 this.asyncValidator = null;
521 }
522 markAsTouched(opts = {}) {
523 const changed = this.touched === false;
524 this.touched = true;
525 const sourceControl = opts.sourceControl ?? this;
526 if (this._parent && !opts.onlySelf) {
527 this._parent.markAsTouched({ ...opts, sourceControl });
528 }
529 if (changed && opts.emitEvent !== false) {
530 this._events.next(new TouchedChangeEvent(true, sourceControl));
531 }
532 }
533 /**
534 * Marks the control and all its descendant controls as `touched`.
535 * @see {@link markAsTouched()}
536 *
537 * @param opts Configuration options that determine how the control propagates changes
538 * and emits events after marking is applied.
539 * * `emitEvent`: When true or not supplied (the default), the `events`
540 * observable emits a `TouchedChangeEvent` with the `touched` property being `true`.
541 * When false, no events are emitted.
542 */
543 markAllAsTouched(opts = {}) {
544 this.markAsTouched({ onlySelf: true, emitEvent: opts.emitEvent, sourceControl: this });
545 this._forEachChild((control) => control.markAllAsTouched(opts));
546 }
547 markAsUntouched(opts = {}) {
548 const changed = this.touched === true;
549 this.touched = false;
550 this._pendingTouched = false;
551 const sourceControl = opts.sourceControl ?? this;
552 this._forEachChild((control) => {
553 control.markAsUntouched({ onlySelf: true, emitEvent: opts.emitEvent, sourceControl });
554 });
555 if (this._parent && !opts.onlySelf) {
556 this._parent._updateTouched(opts, sourceControl);
557 }
558 if (changed && opts.emitEvent !== false) {
559 this._events.next(new TouchedChangeEvent(false, sourceControl));
560 }
561 }
562 markAsDirty(opts = {}) {
563 const changed = this.pristine === true;
564 this.pristine = false;
565 const sourceControl = opts.sourceControl ?? this;
566 if (this._parent && !opts.onlySelf) {
567 this._parent.markAsDirty({ ...opts, sourceControl });
568 }
569 if (changed && opts.emitEvent !== false) {
570 this._events.next(new PristineChangeEvent(false, sourceControl));
571 }
572 }
573 markAsPristine(opts = {}) {
574 const changed = this.pristine === false;
575 this.pristine = true;
576 this._pendingDirty = false;
577 const sourceControl = opts.sourceControl ?? this;
578 this._forEachChild((control) => {
579 /** We don't propagate the source control downwards */
580 control.markAsPristine({ onlySelf: true, emitEvent: opts.emitEvent });
581 });
582 if (this._parent && !opts.onlySelf) {
583 this._parent._updatePristine(opts, sourceControl);
584 }
585 if (changed && opts.emitEvent !== false) {
586 this._events.next(new PristineChangeEvent(true, sourceControl));
587 }
588 }
589 markAsPending(opts = {}) {
590 this.status = PENDING;
591 const sourceControl = opts.sourceControl ?? this;
592 if (opts.emitEvent !== false) {
593 this._events.next(new StatusChangeEvent(this.status, sourceControl));
594 this.statusChanges.emit(this.status);
595 }
596 if (this._parent && !opts.onlySelf) {
597 this._parent.markAsPending({ ...opts, sourceControl });
598 }
599 }
600 disable(opts = {}) {
601 // If parent has been marked artificially dirty we don't want to re-calculate the
602 // parent's dirtiness based on the children.
603 const skipPristineCheck = this._parentMarkedDirty(opts.onlySelf);
604 this.status = DISABLED;
605 this.errors = null;
606 this._forEachChild((control) => {
607 /** We don't propagate the source control downwards */
608 control.disable({ ...opts, onlySelf: true });
609 });
610 this._updateValue();
611 const sourceControl = opts.sourceControl ?? this;
612 if (opts.emitEvent !== false) {
613 this._events.next(new ValueChangeEvent(this.value, sourceControl));
614 this._events.next(new StatusChangeEvent(this.status, sourceControl));
615 this.valueChanges.emit(this.value);
616 this.statusChanges.emit(this.status);
617 }
618 this._updateAncestors({ ...opts, skipPristineCheck }, this);
619 this._onDisabledChange.forEach((changeFn) => changeFn(true));
620 }
621 /**
622 * Enables the control. This means the control is included in validation checks and
623 * the aggregate value of its parent. Its status recalculates based on its value and
624 * its validators.
625 *
626 * By default, if the control has children, all children are enabled.
627 *
628 * @see {@link AbstractControl.status}
629 *
630 * @param opts Configure options that control how the control propagates changes and
631 * emits events when marked as untouched
632 * * `onlySelf`: When true, mark only this control. When false or not supplied,
633 * marks all direct ancestors. Default is false.
634 * * `emitEvent`: When true or not supplied (the default), the `statusChanges`,
635 * `valueChanges` and `events`
636 * observables emit events with the latest status and value when the control is enabled.
637 * When false, no events are emitted.
638 */
639 enable(opts = {}) {
640 // If parent has been marked artificially dirty we don't want to re-calculate the
641 // parent's dirtiness based on the children.
642 const skipPristineCheck = this._parentMarkedDirty(opts.onlySelf);
643 this.status = VALID;
644 this._forEachChild((control) => {
645 control.enable({ ...opts, onlySelf: true });
646 });
647 this.updateValueAndValidity({ onlySelf: true, emitEvent: opts.emitEvent });
648 this._updateAncestors({ ...opts, skipPristineCheck }, this);
649 this._onDisabledChange.forEach((changeFn) => changeFn(false));
650 }
651 _updateAncestors(opts, sourceControl) {
652 if (this._parent && !opts.onlySelf) {
653 this._parent.updateValueAndValidity(opts);
654 if (!opts.skipPristineCheck) {
655 this._parent._updatePristine({}, sourceControl);
656 }
657 this._parent._updateTouched({}, sourceControl);
658 }
659 }
660 /**
661 * Sets the parent of the control
662 *
663 * @param parent The new parent.
664 */
665 setParent(parent) {
666 this._parent = parent;
667 }
668 /**
669 * The raw value of this control. For most control implementations, the raw value will include
670 * disabled children.
671 */
672 getRawValue() {
673 return this.value;
674 }
675 updateValueAndValidity(opts = {}) {
676 this._setInitialStatus();
677 this._updateValue();
678 if (this.enabled) {
679 const shouldHaveEmitted = this._cancelExistingSubscription();
680 this.errors = this._runValidator();
681 this.status = this._calculateStatus();
682 if (this.status === VALID || this.status === PENDING) {
683 // If the canceled subscription should have emitted
684 // we make sure the async validator emits the status change on completion
685 this._runAsyncValidator(shouldHaveEmitted, opts.emitEvent);
686 }
687 }
688 const sourceControl = opts.sourceControl ?? this;
689 if (opts.emitEvent !== false) {
690 this._events.next(new ValueChangeEvent(this.value, sourceControl));
691 this._events.next(new StatusChangeEvent(this.status, sourceControl));
692 this.valueChanges.emit(this.value);
693 this.statusChanges.emit(this.status);
694 }
695 if (this._parent && !opts.onlySelf) {
696 this._parent.updateValueAndValidity({ ...opts, sourceControl });
697 }
698 }
699 /** @internal */
700 _updateTreeValidity(opts = { emitEvent: true }) {
701 this._forEachChild((ctrl) => ctrl._updateTreeValidity(opts));
702 this.updateValueAndValidity({ onlySelf: true, emitEvent: opts.emitEvent });
703 }
704 _setInitialStatus() {
705 this.status = this._allControlsDisabled() ? DISABLED : VALID;
706 }
707 _runValidator() {
708 return this.validator ? this.validator(this) : null;
709 }
710 _runAsyncValidator(shouldHaveEmitted, emitEvent) {
711 if (this.asyncValidator) {
712 this.status = PENDING;
713 this._hasOwnPendingAsyncValidator = { emitEvent: emitEvent !== false };
714 const obs = toObservable(this.asyncValidator(this));
715 this._asyncValidationSubscription = obs.subscribe((errors) => {
716 this._hasOwnPendingAsyncValidator = null;
717 // This will trigger the recalculation of the validation status, which depends on
718 // the state of the asynchronous validation (whether it is in progress or not). So, it is
719 // necessary that we have updated the `_hasOwnPendingAsyncValidator` boolean flag first.
720 this.setErrors(errors, { emitEvent, shouldHaveEmitted });
721 });
722 }
723 }
724 _cancelExistingSubscription() {
725 if (this._asyncValidationSubscription) {
726 this._asyncValidationSubscription.unsubscribe();
727 // we're cancelling the validator subscribtion, we keep if it should have emitted
728 // because we want to emit eventually if it was required at least once.
729 const shouldHaveEmitted = this._hasOwnPendingAsyncValidator?.emitEvent ?? false;
730 this._hasOwnPendingAsyncValidator = null;
731 return shouldHaveEmitted;
732 }
733 return false;
734 }
735 setErrors(errors, opts = {}) {
736 this.errors = errors;
737 this._updateControlsErrors(opts.emitEvent !== false, this, opts.shouldHaveEmitted);
738 }
739 /**
740 * Retrieves a child control given the control's name or path.
741 *
742 * @param path A dot-delimited string or array of string/number values that define the path to the
743 * control. If a string is provided, passing it as a string literal will result in improved type
744 * information. Likewise, if an array is provided, passing it `as const` will cause improved type
745 * information to be available.
746 *
747 * @usageNotes
748 * ### Retrieve a nested control
749 *
750 * For example, to get a `name` control nested within a `person` sub-group:
751 *
752 * * `this.form.get('person.name');`
753 *
754 * -OR-
755 *
756 * * `this.form.get(['person', 'name'] as const);` // `as const` gives improved typings
757 *
758 * ### Retrieve a control in a FormArray
759 *
760 * When accessing an element inside a FormArray, you can use an element index.
761 * For example, to get a `price` control from the first element in an `items` array you can use:
762 *
763 * * `this.form.get('items.0.price');`
764 *
765 * -OR-
766 *
767 * * `this.form.get(['items', 0, 'price']);`
768 */
769 get(path) {
770 let currPath = path;
771 if (currPath == null)
772 return null;
773 if (!Array.isArray(currPath))
774 currPath = currPath.split('.');
775 if (currPath.length === 0)
776 return null;
777 return currPath.reduce((control, name) => control && control._find(name), this);
778 }
779 /**
780 * @description
781 * Reports error data for the control with the given path.
782 *
783 * @param errorCode The code of the error to check
784 * @param path A list of control names that designates how to move from the current control
785 * to the control that should be queried for errors.
786 *
787 * @usageNotes
788 * For example, for the following `FormGroup`:
789 *
790 * ```
791 * form = new FormGroup({
792 * address: new FormGroup({ street: new FormControl() })
793 * });
794 * ```
795 *
796 * The path to the 'street' control from the root form would be 'address' -> 'street'.
797 *
798 * It can be provided to this method in one of two formats:
799 *
800 * 1. An array of string control names, e.g. `['address', 'street']`
801 * 1. A period-delimited list of control names in one string, e.g. `'address.street'`
802 *
803 * @returns error data for that particular error. If the control or error is not present,
804 * null is returned.
805 */
806 getError(errorCode, path) {
807 const control = path ? this.get(path) : this;
808 return control && control.errors ? control.errors[errorCode] : null;
809 }
810 /**
811 * @description
812 * Reports whether the control with the given path has the error specified.
813 *
814 * @param errorCode The code of the error to check
815 * @param path A list of control names that designates how to move from the current control
816 * to the control that should be queried for errors.
817 *
818 * @usageNotes
819 * For example, for the following `FormGroup`:
820 *
821 * ```
822 * form = new FormGroup({
823 * address: new FormGroup({ street: new FormControl() })
824 * });
825 * ```
826 *
827 * The path to the 'street' control from the root form would be 'address' -> 'street'.
828 *
829 * It can be provided to this method in one of two formats:
830 *
831 * 1. An array of string control names, e.g. `['address', 'street']`
832 * 1. A period-delimited list of control names in one string, e.g. `'address.street'`
833 *
834 * If no path is given, this method checks for the error on the current control.
835 *
836 * @returns whether the given error is present in the control at the given path.
837 *
838 * If the control is not present, false is returned.
839 */
840 hasError(errorCode, path) {
841 return !!this.getError(errorCode, path);
842 }
843 /**
844 * Retrieves the top-level ancestor of this control.
845 */
846 get root() {
847 let x = this;
848 while (x._parent) {
849 x = x._parent;
850 }
851 return x;
852 }
853 /** @internal */
854 _updateControlsErrors(emitEvent, changedControl, shouldHaveEmitted) {
855 this.status = this._calculateStatus();
856 if (emitEvent) {
857 this.statusChanges.emit(this.status);
858 }
859 // The Events Observable expose a slight different bevahior than the statusChanges obs
860 // An async validator will still emit a StatusChangeEvent is a previously cancelled
861 // async validator has emitEvent set to true
862 if (emitEvent || shouldHaveEmitted) {
863 this._events.next(new StatusChangeEvent(this.status, changedControl));
864 }
865 if (this._parent) {
866 this._parent._updateControlsErrors(emitEvent, changedControl, shouldHaveEmitted);
867 }
868 }
869 /** @internal */
870 _initObservables() {
871 this.valueChanges = new EventEmitter();
872 this.statusChanges = new EventEmitter();
873 }
874 _calculateStatus() {
875 if (this._allControlsDisabled())
876 return DISABLED;
877 if (this.errors)
878 return INVALID;
879 if (this._hasOwnPendingAsyncValidator || this._anyControlsHaveStatus(PENDING))
880 return PENDING;
881 if (this._anyControlsHaveStatus(INVALID))
882 return INVALID;
883 return VALID;
884 }
885 /** @internal */
886 _anyControlsHaveStatus(status) {
887 return this._anyControls((control) => control.status === status);
888 }
889 /** @internal */
890 _anyControlsDirty() {
891 return this._anyControls((control) => control.dirty);
892 }
893 /** @internal */
894 _anyControlsTouched() {
895 return this._anyControls((control) => control.touched);
896 }
897 /** @internal */
898 _updatePristine(opts, changedControl) {
899 const newPristine = !this._anyControlsDirty();
900 const changed = this.pristine !== newPristine;
901 this.pristine = newPristine;
902 if (this._parent && !opts.onlySelf) {
903 this._parent._updatePristine(opts, changedControl);
904 }
905 if (changed) {
906 this._events.next(new PristineChangeEvent(this.pristine, changedControl));
907 }
908 }
909 /** @internal */
910 _updateTouched(opts = {}, changedControl) {
911 this.touched = this._anyControlsTouched();
912 this._events.next(new TouchedChangeEvent(this.touched, changedControl));
913 if (this._parent && !opts.onlySelf) {
914 this._parent._updateTouched(opts, changedControl);
915 }
916 }
917 /** @internal */
918 _registerOnCollectionChange(fn) {
919 this._onCollectionChange = fn;
920 }
921 /** @internal */
922 _setUpdateStrategy(opts) {
923 if (isOptionsObj(opts) && opts.updateOn != null) {
924 this._updateOn = opts.updateOn;
925 }
926 }
927 /**
928 * Check to see if parent has been marked artificially dirty.
929 *
930 * @internal
931 */
932 _parentMarkedDirty(onlySelf) {
933 const parentDirty = this._parent && this._parent.dirty;
934 return !onlySelf && !!parentDirty && !this._parent._anyControlsDirty();
935 }
936 /** @internal */
937 _find(name) {
938 return null;
939 }
940 /**
941 * Internal implementation of the `setValidators` method. Needs to be separated out into a
942 * different method, because it is called in the constructor and it can break cases where
943 * a control is extended.
944 */
945 _assignValidators(validators) {
946 this._rawValidators = Array.isArray(validators) ? validators.slice() : validators;
947 this._composedValidatorFn = coerceToValidator(this._rawValidators);
948 }
949 /**
950 * Internal implementation of the `setAsyncValidators` method. Needs to be separated out into a
951 * different method, because it is called in the constructor and it can break cases where
952 * a control is extended.
953 */
954 _assignAsyncValidators(validators) {
955 this._rawAsyncValidators = Array.isArray(validators) ? validators.slice() : validators;
956 this._composedAsyncValidatorFn = coerceToAsyncValidator(this._rawAsyncValidators);
957 }
958}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {EventEmitter, ɵRuntimeError as RuntimeError, ɵWritable as Writable} from '@angular/core';\nimport {Observable, Subject} from 'rxjs';\n\nimport {\n  asyncValidatorsDroppedWithOptsWarning,\n  missingControlError,\n  missingControlValueError,\n  noControlsError,\n} from '../directives/reactive_errors';\nimport {AsyncValidatorFn, ValidationErrors, ValidatorFn} from '../directives/validators';\nimport {RuntimeErrorCode} from '../errors';\nimport {FormArray, FormGroup} from '../forms';\nimport {\n  addValidators,\n  composeAsyncValidators,\n  composeValidators,\n  hasValidator,\n  removeValidators,\n  toObservable,\n} from '../validators';\n\n/**\n * Reports that a control is valid, meaning that no errors exist in the input value.\n *\n * @see {@link status}\n */\nexport const VALID 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Each\n * possible status is returned as a string literal.\n *\n * * **VALID**: Reports that a control is valid, meaning that no errors exist in the input\n * value.\n * * **INVALID**: Reports that a control is invalid, meaning that an error exists in the input\n * value.\n * * **PENDING**: Reports that a control is pending, meaning that async validation is\n * occurring and errors are not yet available for the input value.\n * * **DISABLED**: Reports that a control is\n * disabled, meaning that the control is exempt from ancestor calculations of validity or value.\n *\n * @publicApi\n */\nexport type FormControlStatus = 'VALID' | 'INVALID' | 'PENDING' | 'DISABLED';\n\n/**\n * Base class for every event sent by `AbstractControl.events()`\n *\n * @publicApi\n */\nexport abstract class ControlEvent<T = any> {\n  /**\n   * Form control from which this event is originated.\n   */\n  public abstract readonly source: AbstractControl<unknown>;\n}\n\n/**\n * Event fired when the value of a control changes.\n *\n * @publicApi\n */\nexport class ValueChangeEvent<T> extends ControlEvent<T> {\n  constructor(\n    public readonly value: T,\n    public readonly source: AbstractControl,\n  ) {\n    super();\n  }\n}\n\n/**\n * Event fired when the control's pristine state changes (pristine <=> dirty).\n *\n * @publicApi */\nexport class PristineChangeEvent extends ControlEvent {\n  constructor(\n    public readonly pristine: boolean,\n    public readonly source: AbstractControl,\n  ) {\n    super();\n  }\n}\n\n/**\n * Event fired when the control's touched status changes (touched <=> untouched).\n *\n * @publicApi\n */\nexport class TouchedChangeEvent extends ControlEvent {\n  constructor(\n    public readonly touched: boolean,\n    public readonly source: AbstractControl,\n  ) {\n    super();\n  }\n}\n\n/**\n * Event fired when the control's status changes.\n *\n * @publicApi\n */\nexport class StatusChangeEvent extends ControlEvent {\n  constructor(\n    public readonly status: FormControlStatus,\n    public readonly source: AbstractControl,\n  ) {\n    super();\n  }\n}\n\n/**\n * Event fired when a form is submitted\n *\n * @publicApi\n */\nexport class FormSubmittedEvent extends ControlEvent {\n  constructor(public readonly source: AbstractControl) {\n    super();\n  }\n}\n/**\n * Event fired when a form is reset.\n *\n * @publicApi\n */\nexport class FormResetEvent extends ControlEvent {\n  constructor(public readonly source: AbstractControl) {\n    super();\n  }\n}\n\n/**\n * Gets validators from either an options object or given validators.\n */\nexport function pickValidators(\n  validatorOrOpts?: ValidatorFn | ValidatorFn[] | AbstractControlOptions | null,\n): ValidatorFn | ValidatorFn[] | null {\n  return (isOptionsObj(validatorOrOpts) ? validatorOrOpts.validators : validatorOrOpts) || null;\n}\n\n/**\n * Creates validator function by combining provided validators.\n */\nfunction coerceToValidator(validator: ValidatorFn | ValidatorFn[] | null): ValidatorFn | null {\n  return Array.isArray(validator) ? composeValidators(validator) : validator || null;\n}\n\n/**\n * Gets async validators from either an options object or given validators.\n */\nexport function pickAsyncValidators(\n  asyncValidator?: AsyncValidatorFn | AsyncValidatorFn[] | null,\n  validatorOrOpts?: ValidatorFn | ValidatorFn[] | AbstractControlOptions | null,\n): AsyncValidatorFn | AsyncValidatorFn[] | null {\n  if (typeof ngDevMode === 'undefined' || ngDevMode) {\n    if (isOptionsObj(validatorOrOpts) && asyncValidator) {\n      console.warn(asyncValidatorsDroppedWithOptsWarning);\n    }\n  }\n  return (isOptionsObj(validatorOrOpts) ? validatorOrOpts.asyncValidators : asyncValidator) || null;\n}\n\n/**\n * Creates async validator function by combining provided async validators.\n */\nfunction coerceToAsyncValidator(\n  asyncValidator?: AsyncValidatorFn | AsyncValidatorFn[] | null,\n): AsyncValidatorFn | null {\n  return Array.isArray(asyncValidator)\n    ? composeAsyncValidators(asyncValidator)\n    : asyncValidator || null;\n}\n\nexport type FormHooks = 'change' | 'blur' | 'submit';\n\n/**\n * Interface for options provided to an `AbstractControl`.\n *\n * @publicApi\n */\nexport interface AbstractControlOptions {\n  /**\n   * @description\n   * The list of validators applied to a control.\n   */\n  validators?: ValidatorFn | ValidatorFn[] | null;\n  /**\n   * @description\n   * The list of async validators applied to control.\n   */\n  asyncValidators?: AsyncValidatorFn | AsyncValidatorFn[] | null;\n  /**\n   * @description\n   * The event name for control to update upon.\n   */\n  updateOn?: 'change' | 'blur' | 'submit';\n}\n\nexport function isOptionsObj(\n  validatorOrOpts?: ValidatorFn | ValidatorFn[] | AbstractControlOptions | null,\n): validatorOrOpts is AbstractControlOptions {\n  return (\n    validatorOrOpts != null &&\n    !Array.isArray(validatorOrOpts) &&\n    typeof validatorOrOpts === 'object'\n  );\n}\n\nexport function assertControlPresent(parent: any, isGroup: boolean, key: string | number): void {\n  const controls = parent.controls as {[key: string | number]: unknown};\n  const collection = isGroup ? Object.keys(controls) : controls;\n  if (!collection.length) {\n    throw new RuntimeError(\n      RuntimeErrorCode.NO_CONTROLS,\n      typeof ngDevMode === 'undefined' || ngDevMode ? noControlsError(isGroup) : '',\n    );\n  }\n  if (!controls[key]) {\n    throw new RuntimeError(\n      RuntimeErrorCode.MISSING_CONTROL,\n      typeof ngDevMode === 'undefined' || ngDevMode ? missingControlError(isGroup, key) : '',\n    );\n  }\n}\n\nexport function assertAllValuesPresent(control: any, isGroup: boolean, value: any): void {\n  control._forEachChild((_: unknown, key: string | number) => {\n    if (value[key] === undefined) {\n      throw new RuntimeError(\n        RuntimeErrorCode.MISSING_CONTROL_VALUE,\n        typeof ngDevMode === 'undefined' || ngDevMode ? missingControlValueError(isGroup, key) : '',\n      );\n    }\n  });\n}\n\n// IsAny checks if T is `any`, by checking a condition that couldn't possibly be true otherwise.\nexport type ɵIsAny<T, Y, N> = 0 extends 1 & T ? Y : N;\n\n/**\n * `TypedOrUntyped` allows one of two different types to be selected, depending on whether the Forms\n * class it's applied to is typed or not.\n *\n * This is for internal Angular usage to support typed forms; do not directly use it.\n */\nexport type ɵTypedOrUntyped<T, Typed, Untyped> = ɵIsAny<T, Untyped, Typed>;\n\n/**\n * Value gives the value type corresponding to a control type.\n *\n * Note that the resulting type will follow the same rules as `.value` on your control, group, or\n * array, including `undefined` for each group element which might be disabled.\n *\n * If you are trying to extract a value type for a data model, you probably want {@link RawValue},\n * which will not have `undefined` in group keys.\n *\n * @usageNotes\n *\n * ### `FormControl` value type\n *\n * You can extract the value type of a single control:\n *\n * ```ts\n * type NameControl = FormControl<string>;\n * type NameValue = Value<NameControl>;\n * ```\n *\n * The resulting type is `string`.\n *\n * ### `FormGroup` value type\n *\n * Imagine you have an interface defining the controls in your group. You can extract the shape of\n * the values as follows:\n *\n * ```ts\n * interface PartyFormControls {\n *   address: FormControl<string>;\n * }\n *\n * // Value operates on controls; the object must be wrapped in a FormGroup.\n * type PartyFormValues = Value<FormGroup<PartyFormControls>>;\n * ```\n *\n * The resulting type is `{address: string|undefined}`.\n *\n * ### `FormArray` value type\n *\n * You can extract values from FormArrays as well:\n *\n * ```ts\n * type GuestNamesControls = FormArray<FormControl<string>>;\n *\n * type NamesValues = Value<GuestNamesControls>;\n * ```\n *\n * The resulting type is `string[]`.\n *\n * **Internal: not for public use.**\n */\nexport type ɵValue<T extends AbstractControl | undefined> =\n  T extends AbstractControl<any, any> ? T['value'] : never;\n\n/**\n * RawValue gives the raw value type corresponding to a control type.\n *\n * Note that the resulting type will follow the same rules as `.getRawValue()` on your control,\n * group, or array. This means that all controls inside a group will be required, not optional,\n * regardless of their disabled state.\n *\n * You may also wish to use {@link ɵValue}, which will have `undefined` in group keys (which can be\n * disabled).\n *\n * @usageNotes\n *\n * ### `FormGroup` raw value type\n *\n * Imagine you have an interface defining the controls in your group. You can extract the shape of\n * the raw values as follows:\n *\n * ```ts\n * interface PartyFormControls {\n *   address: FormControl<string>;\n * }\n *\n * // RawValue operates on controls; the object must be wrapped in a FormGroup.\n * type PartyFormValues = RawValue<FormGroup<PartyFormControls>>;\n * ```\n *\n * The resulting type is `{address: string}`. (Note the absence of `undefined`.)\n *\n *  **Internal: not for public use.**\n */\nexport type ɵRawValue<T extends AbstractControl | undefined> =\n  T extends AbstractControl<any, any>\n    ? T['setValue'] extends (v: infer R) => void\n      ? R\n      : never\n    : never;\n\n/**\n * Tokenize splits a string literal S by a delimiter D.\n */\nexport type ɵTokenize<S extends string, D extends string> = string extends S\n  ? string[] /* S must be a literal */\n  : S extends `${infer T}${D}${infer U}`\n    ? [T, ...ɵTokenize<U, D>]\n    : [S] /* Base case */;\n\n/**\n * CoerceStrArrToNumArr accepts an array of strings, and converts any numeric string to a number.\n */\nexport type ɵCoerceStrArrToNumArr<S> =\n  // Extract the head of the array.\n  S extends [infer Head, ...infer Tail]\n    ? // Using a template literal type, coerce the head to `number` if possible.\n      // Then, recurse on the tail.\n      Head extends `${number}`\n      ? [number, ...ɵCoerceStrArrToNumArr<Tail>]\n      : [Head, ...ɵCoerceStrArrToNumArr<Tail>]\n    : [];\n\n/**\n * Navigate takes a type T and an array K, and returns the type of T[K[0]][K[1]][K[2]]...\n */\nexport type ɵNavigate<\n  T,\n  K extends Array<string | number>,\n> = T extends object /* T must be indexable (object or array) */\n  ? K extends [infer Head, ...infer Tail] /* Split K into head and tail */\n    ? Head extends keyof T /* head(K) must index T */\n      ? Tail extends (string | number)[] /* tail(K) must be an array */\n        ? [] extends Tail\n          ? T[Head] /* base case: K can be split, but Tail is empty */\n          : ɵNavigate<T[Head], Tail> /* explore T[head(K)] by tail(K) */\n        : any /* tail(K) was not an array, give up */\n      : never /* head(K) does not index T, give up */\n    : any /* K cannot be split, give up */\n  : any /* T is not indexable, give up */;\n\n/**\n * ɵWriteable removes readonly from all keys.\n */\nexport type ɵWriteable<T> = {\n  -readonly [P in keyof T]: T[P];\n};\n\n/**\n * GetProperty takes a type T and some property names or indices K.\n * If K is a dot-separated string, it is tokenized into an array before proceeding.\n * Then, the type of the nested property at K is computed: T[K[0]][K[1]][K[2]]...\n * This works with both objects, which are indexed by property name, and arrays, which are indexed\n * numerically.\n *\n * For internal use only.\n */\nexport type ɵGetProperty<T, K> =\n  // K is a string\n  K extends string\n    ? ɵGetProperty<T, ɵCoerceStrArrToNumArr<ɵTokenize<K, '.'>>>\n    : // Is it an array\n      ɵWriteable<K> extends Array<string | number>\n      ? ɵNavigate<T, ɵWriteable<K>>\n      : // Fall through permissively if we can't calculate the type of K.\n        any;\n\n/**\n * This is the base class for `FormControl`, `FormGroup`, and `FormArray`.\n *\n * It provides some of the shared behavior that all controls and groups of controls have, like\n * running validators, calculating status, and resetting state. It also defines the properties\n * that are shared between all sub-classes, like `value`, `valid`, and `dirty`. It shouldn't be\n * instantiated directly.\n *\n * The first type parameter TValue represents the value type of the control (`control.value`).\n * The optional type parameter TRawValue  represents the raw value type (`control.getRawValue()`).\n *\n * @see [Forms Guide](guide/forms)\n * @see [Reactive Forms Guide](guide/forms/reactive-forms)\n * @see [Dynamic Forms Guide](guide/forms/dynamic-forms)\n *\n * @publicApi\n */\nexport abstract class AbstractControl<TValue = any, TRawValue extends TValue = TValue> {\n  /** @internal */\n  _pendingDirty = false;\n\n  /**\n   * Indicates that a control has its own pending asynchronous validation in progress.\n   * It also stores if the control should emit events when the validation status changes.\n   *\n   * @internal\n   */\n  _hasOwnPendingAsyncValidator: null | {emitEvent: boolean} = null;\n\n  /** @internal */\n  _pendingTouched = false;\n\n  /** @internal */\n  _onCollectionChange = () => {};\n\n  /** @internal */\n  _updateOn?: FormHooks;\n\n  private _parent: FormGroup | FormArray | null = null;\n  private _asyncValidationSubscription: any;\n\n  /**\n   * Contains the result of merging synchronous validators into a single validator function\n   * (combined using `Validators.compose`).\n   *\n   * @internal\n   */\n  private _composedValidatorFn!: ValidatorFn | null;\n\n  /**\n   * Contains the result of merging asynchronous validators into a single validator function\n   * (combined using `Validators.composeAsync`).\n   *\n   * @internal\n   */\n  private _composedAsyncValidatorFn!: AsyncValidatorFn | null;\n\n  /**\n   * Synchronous validators as they were provided:\n   *  - in `AbstractControl` constructor\n   *  - as an argument while calling `setValidators` function\n   *  - while calling the setter on the `validator` field (e.g. `control.validator = validatorFn`)\n   *\n   * @internal\n   */\n  private _rawValidators!: ValidatorFn | ValidatorFn[] | null;\n\n  /**\n   * Asynchronous validators as they were provided:\n   *  - in `AbstractControl` constructor\n   *  - as an argument while calling `setAsyncValidators` function\n   *  - while calling the setter on the `asyncValidator` field (e.g. `control.asyncValidator =\n   * asyncValidatorFn`)\n   *\n   * @internal\n   */\n  private _rawAsyncValidators!: AsyncValidatorFn | AsyncValidatorFn[] | null;\n\n  /**\n   * The current value of the control.\n   *\n   * * For a `FormControl`, the current value.\n   * * For an enabled `FormGroup`, the values of enabled controls as an object\n   * with a key-value pair for each member of the group.\n   * * For a disabled `FormGroup`, the values of all controls as an object\n   * with a key-value pair for each member of the group.\n   * * For a `FormArray`, the values of enabled controls as an array.\n   *\n   */\n  public readonly value!: TValue;\n\n  /**\n   * Initialize the AbstractControl instance.\n   *\n   * @param validators The function or array of functions that is used to determine the validity of\n   *     this control synchronously.\n   * @param asyncValidators The function or array of functions that is used to determine validity of\n   *     this control asynchronously.\n   */\n  constructor(\n    validators: ValidatorFn | ValidatorFn[] | null,\n    asyncValidators: AsyncValidatorFn | AsyncValidatorFn[] | null,\n  ) {\n    this._assignValidators(validators);\n    this._assignAsyncValidators(asyncValidators);\n  }\n\n  /**\n   * Returns the function that is used to determine the validity of this control synchronously.\n   * If multiple validators have been added, this will be a single composed function.\n   * See `Validators.compose()` for additional information.\n   */\n  get validator(): ValidatorFn | null {\n    return this._composedValidatorFn;\n  }\n  set validator(validatorFn: ValidatorFn | null) {\n    this._rawValidators = this._composedValidatorFn = validatorFn;\n  }\n\n  /**\n   * Returns the function that is used to determine the validity of this control asynchronously.\n   * If multiple validators have been added, this will be a single composed function.\n   * See `Validators.compose()` for additional information.\n   */\n  get asyncValidator(): AsyncValidatorFn | null {\n    return this._composedAsyncValidatorFn;\n  }\n  set asyncValidator(asyncValidatorFn: AsyncValidatorFn | null) {\n    this._rawAsyncValidators = this._composedAsyncValidatorFn = asyncValidatorFn;\n  }\n\n  /**\n   * The parent control.\n   */\n  get parent(): FormGroup | FormArray | null {\n    return this._parent;\n  }\n\n  /**\n   * The validation status of the control.\n   *\n   * @see {@link FormControlStatus}\n   *\n   * These status values are mutually exclusive, so a control cannot be\n   * both valid AND invalid or invalid AND disabled.\n   */\n  public readonly status!: FormControlStatus;\n\n  /**\n   * A control is `valid` when its `status` is `VALID`.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   * @returns True if the control has passed all of its validation tests,\n   * false otherwise.\n   */\n  get valid(): boolean {\n    return this.status === VALID;\n  }\n\n  /**\n   * A control is `invalid` when its `status` is `INVALID`.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   * @returns True if this control has failed one or more of its validation checks,\n   * false otherwise.\n   */\n  get invalid(): boolean {\n    return this.status === INVALID;\n  }\n\n  /**\n   * A control is `pending` when its `status` is `PENDING`.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   * @returns True if this control is in the process of conducting a validation check,\n   * false otherwise.\n   */\n  get pending(): boolean {\n    return this.status == PENDING;\n  }\n\n  /**\n   * A control is `disabled` when its `status` is `DISABLED`.\n   *\n   * Disabled controls are exempt from validation checks and\n   * are not included in the aggregate value of their ancestor\n   * controls.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   * @returns True if the control is disabled, false otherwise.\n   */\n  get disabled(): boolean {\n    return this.status === DISABLED;\n  }\n\n  /**\n   * A control is `enabled` as long as its `status` is not `DISABLED`.\n   *\n   * @returns True if the control has any status other than 'DISABLED',\n   * false if the status is 'DISABLED'.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   */\n  get enabled(): boolean {\n    return this.status !== DISABLED;\n  }\n\n  /**\n   * An object containing any errors generated by failing validation,\n   * or null if there are no errors.\n   */\n  public readonly errors!: ValidationErrors | null;\n\n  /**\n   * A control is `pristine` if the user has not yet changed\n   * the value in the UI.\n   *\n   * @returns True if the user has not yet changed the value in the UI; compare `dirty`.\n   * Programmatic changes to a control's value do not mark it dirty.\n   */\n  public readonly pristine: boolean = true;\n\n  /**\n   * A control is `dirty` if the user has changed the value\n   * in the UI.\n   *\n   * @returns True if the user has changed the value of this control in the UI; compare `pristine`.\n   * Programmatic changes to a control's value do not mark it dirty.\n   */\n  get dirty(): boolean {\n    return !this.pristine;\n  }\n\n  /**\n   * True if the control is marked as `touched`.\n   *\n   * A control is marked `touched` once the user has triggered\n   * a `blur` event on it.\n   */\n  public readonly touched: boolean = false;\n\n  /**\n   * True if the control has not been marked as touched\n   *\n   * A control is `untouched` if the user has not yet triggered\n   * a `blur` event on it.\n   */\n  get untouched(): boolean {\n    return !this.touched;\n  }\n\n  /**\n   * Exposed as observable, see below.\n   *\n   * @internal\n   */\n  readonly _events = new Subject<ControlEvent<TValue>>();\n\n  /**\n   * A multicasting observable that emits an event every time the state of the control changes.\n   * It emits for value, status, pristine or touched changes.\n   *\n   * **Note**: On value change, the emit happens right after a value of this control is updated. The\n   * value of a parent control (for example if this FormControl is a part of a FormGroup) is updated\n   * later, so accessing a value of a parent control (using the `value` property) from the callback\n   * of this event might result in getting a value that has not been updated yet. Subscribe to the\n   * `events` of the parent control instead.\n   * For other event types, the events are emitted after the parent control has been updated.\n   *\n   */\n  public readonly events = this._events.asObservable();\n\n  /**\n   * A multicasting observable that emits an event every time the value of the control changes, in\n   * the UI or programmatically. It also emits an event each time you call enable() or disable()\n   * without passing along {emitEvent: false} as a function argument.\n   *\n   * **Note**: the emit happens right after a value of this control is updated. The value of a\n   * parent control (for example if this FormControl is a part of a FormGroup) is updated later, so\n   * accessing a value of a parent control (using the `value` property) from the callback of this\n   * event might result in getting a value that has not been updated yet. Subscribe to the\n   * `valueChanges` event of the parent control instead.\n   *\n   * TODO: this should be piped from events() but is breaking in G3\n   */\n  public readonly valueChanges!: Observable<TValue>;\n\n  /**\n   * A multicasting observable that emits an event every time the validation `status` of the control\n   * recalculates.\n   *\n   * @see {@link FormControlStatus}\n   * @see {@link AbstractControl.status}\n   *\n   * TODO: this should be piped from events() but is breaking in G3\n   */\n  public readonly statusChanges!: Observable<FormControlStatus>;\n\n  /**\n   * Reports the update strategy of the `AbstractControl` (meaning\n   * the event on which the control updates itself).\n   * Possible values: `'change'` | `'blur'` | `'submit'`\n   * Default value: `'change'`\n   */\n  get updateOn(): FormHooks {\n    return this._updateOn ? this._updateOn : this.parent ? this.parent.updateOn : 'change';\n  }\n\n  /**\n   * Sets the synchronous validators that are active on this control.  Calling\n   * this overwrites any existing synchronous validators.\n   *\n   * When you add or remove a validator at run time, you must call\n   * `updateValueAndValidity()` for the new validation to take effect.\n   *\n   * If you want to add a new validator without affecting existing ones, consider\n   * using `addValidators()` method instead.\n   */\n  setValidators(validators: ValidatorFn | ValidatorFn[] | null): void {\n    this._assignValidators(validators);\n  }\n\n  /**\n   * Sets the asynchronous validators that are active on this control. Calling this\n   * overwrites any existing asynchronous validators.\n   *\n   * When you add or remove a validator at run time, you must call\n   * `updateValueAndValidity()` for the new validation to take effect.\n   *\n   * If you want to add a new validator without affecting existing ones, consider\n   * using `addAsyncValidators()` method instead.\n   */\n  setAsyncValidators(validators: AsyncValidatorFn | AsyncValidatorFn[] | null): void {\n    this._assignAsyncValidators(validators);\n  }\n\n  /**\n   * Add a synchronous validator or validators to this control, without affecting other validators.\n   *\n   * When you add or remove a validator at run time, you must call\n   * `updateValueAndValidity()` for the new validation to take effect.\n   *\n   * Adding a validator that already exists will have no effect. If duplicate validator functions\n   * are present in the `validators` array, only the first instance would be added to a form\n   * control.\n   *\n   * @param validators The new validator function or functions to add to this control.\n   */\n  addValidators(validators: ValidatorFn | ValidatorFn[]): void {\n    this.setValidators(addValidators(validators, this._rawValidators));\n  }\n\n  /**\n   * Add an asynchronous validator or validators to this control, without affecting other\n   * validators.\n   *\n   * When you add or remove a validator at run time, you must call\n   * `updateValueAndValidity()` for the new validation to take effect.\n   *\n   * Adding a validator that already exists will have no effect.\n   *\n   * @param validators The new asynchronous validator function or functions to add to this control.\n   */\n  addAsyncValidators(validators: AsyncValidatorFn | AsyncValidatorFn[]): void {\n    this.setAsyncValidators(addValidators(validators, this._rawAsyncValidators));\n  }\n\n  /**\n   * Remove a synchronous validator from this control, without affecting other validators.\n   * Validators are compared by function reference; you must pass a reference to the exact same\n   * validator function as the one that was originally set. If a provided validator is not found,\n   * it is ignored.\n   *\n   * @usageNotes\n   *\n   * ### Reference to a ValidatorFn\n   *\n   * ```\n   * // Reference to the RequiredValidator\n   * const ctrl = new FormControl<string | null>('', Validators.required);\n   * ctrl.removeValidators(Validators.required);\n   *\n   * // Reference to anonymous function inside MinValidator\n   * const minValidator = Validators.min(3);\n   * const ctrl = new FormControl<string | null>('', minValidator);\n   * expect(ctrl.hasValidator(minValidator)).toEqual(true)\n   * expect(ctrl.hasValidator(Validators.min(3))).toEqual(false)\n   *\n   * ctrl.removeValidators(minValidator);\n   * ```\n   *\n   * When you add or remove a validator at run time, you must call\n   * `updateValueAndValidity()` for the new validation to take effect.\n   *\n   * @param validators The validator or validators to remove.\n   */\n  removeValidators(validators: ValidatorFn | ValidatorFn[]): void {\n    this.setValidators(removeValidators(validators, this._rawValidators));\n  }\n\n  /**\n   * Remove an asynchronous validator from this control, without affecting other validators.\n   * Validators are compared by function reference; you must pass a reference to the exact same\n   * validator function as the one that was originally set. If a provided validator is not found, it\n   * is ignored.\n   *\n   * When you add or remove a validator at run time, you must call\n   * `updateValueAndValidity()` for the new validation to take effect.\n   *\n   * @param validators The asynchronous validator or validators to remove.\n   */\n  removeAsyncValidators(validators: AsyncValidatorFn | AsyncValidatorFn[]): void {\n    this.setAsyncValidators(removeValidators(validators, this._rawAsyncValidators));\n  }\n\n  /**\n   * Check whether a synchronous validator function is present on this control. The provided\n   * validator must be a reference to the exact same function that was provided.\n   *\n   * @usageNotes\n   *\n   * ### Reference to a ValidatorFn\n   *\n   * ```\n   * // Reference to the RequiredValidator\n   * const ctrl = new FormControl<number | null>(0, Validators.required);\n   * expect(ctrl.hasValidator(Validators.required)).toEqual(true)\n   *\n   * // Reference to anonymous function inside MinValidator\n   * const minValidator = Validators.min(3);\n   * const ctrl = new FormControl<number | null>(0, minValidator);\n   * expect(ctrl.hasValidator(minValidator)).toEqual(true)\n   * expect(ctrl.hasValidator(Validators.min(3))).toEqual(false)\n   * ```\n   *\n   * @param validator The validator to check for presence. Compared by function reference.\n   * @returns Whether the provided validator was found on this control.\n   */\n  hasValidator(validator: ValidatorFn): boolean {\n    return hasValidator(this._rawValidators, validator);\n  }\n\n  /**\n   * Check whether an asynchronous validator function is present on this control. The provided\n   * validator must be a reference to the exact same function that was provided.\n   *\n   * @param validator The asynchronous validator to check for presence. Compared by function\n   *     reference.\n   * @returns Whether the provided asynchronous validator was found on this control.\n   */\n  hasAsyncValidator(validator: AsyncValidatorFn): boolean {\n    return hasValidator(this._rawAsyncValidators, validator);\n  }\n\n  /**\n   * Empties out the synchronous validator list.\n   *\n   * When you add or remove a validator at run time, you must call\n   * `updateValueAndValidity()` for the new validation to take effect.\n   *\n   */\n  clearValidators(): void {\n    this.validator = null;\n  }\n\n  /**\n   * Empties out the async validator list.\n   *\n   * When you add or remove a validator at run time, you must call\n   * `updateValueAndValidity()` for the new validation to take effect.\n   *\n   */\n  clearAsyncValidators(): void {\n    this.asyncValidator = null;\n  }\n\n  /**\n   * Marks the control as `touched`. A control is touched by focus and\n   * blur events that do not change the value.\n   *\n   * @see {@link markAsUntouched()}\n   * @see {@link markAsDirty()}\n   * @see {@link markAsPristine()}\n   *\n   * @param opts Configuration options that determine how the control propagates changes\n   * and emits events after marking is applied.\n   * * `onlySelf`: When true, mark only this control. When false or not supplied,\n   * marks all direct ancestors. Default is false.\n   * * `emitEvent`: When true or not supplied (the default), the `events`\n   * observable emits a `TouchedChangeEvent` with the `touched` property being `true`.\n   * When false, no events are emitted.\n   */\n  markAsTouched(opts?: {onlySelf?: boolean; emitEvent?: boolean}): void;\n  /**\n   * @internal Used to propagate the source control downwards\n   */\n  markAsTouched(opts?: {\n    onlySelf?: boolean;\n    emitEvent?: boolean;\n    sourceControl?: AbstractControl;\n  }): void;\n  markAsTouched(\n    opts: {onlySelf?: boolean; emitEvent?: boolean; sourceControl?: AbstractControl} = {},\n  ): void {\n    const changed = this.touched === false;\n    (this as Writable<this>).touched = true;\n\n    const sourceControl = opts.sourceControl ?? this;\n    if (this._parent && !opts.onlySelf) {\n      this._parent.markAsTouched({...opts, sourceControl});\n    }\n\n    if (changed && opts.emitEvent !== false) {\n      this._events.next(new TouchedChangeEvent(true, sourceControl));\n    }\n  }\n\n  /**\n   * Marks the control and all its descendant controls as `touched`.\n   * @see {@link markAsTouched()}\n   *\n   * @param opts Configuration options that determine how the control propagates changes\n   * and emits events after marking is applied.\n   * * `emitEvent`: When true or not supplied (the default), the `events`\n   * observable emits a `TouchedChangeEvent` with the `touched` property being `true`.\n   * When false, no events are emitted.\n   */\n  markAllAsTouched(opts: {emitEvent?: boolean} = {}): void {\n    this.markAsTouched({onlySelf: true, emitEvent: opts.emitEvent, sourceControl: this});\n\n    this._forEachChild((control: AbstractControl) => control.markAllAsTouched(opts));\n  }\n\n  /**\n   * Marks the control as `untouched`.\n   *\n   * If the control has any children, also marks all children as `untouched`\n   * and recalculates the `touched` status of all parent controls.\n   *\n   * @see {@link markAsTouched()}\n   * @see {@link markAsDirty()}\n   * @see {@link markAsPristine()}\n   *\n   * @param opts Configuration options that determine how the control propagates changes\n   * and emits events after the marking is applied.\n   * * `onlySelf`: When true, mark only this control. When false or not supplied,\n   * marks all direct ancestors. Default is false.\n   * * `emitEvent`: When true or not supplied (the default), the `events`\n   * observable emits a `TouchedChangeEvent` with the `touched` property being `false`.\n   * When false, no events are emitted.\n   */\n  markAsUntouched(opts?: {onlySelf?: boolean; emitEvent?: boolean}): void;\n  /**\n   *\n   * @internal Used to propagate the source control downwards\n   */\n  markAsUntouched(opts: {\n    onlySelf?: boolean;\n    emitEvent?: boolean;\n    sourceControl?: AbstractControl;\n  }): void;\n  markAsUntouched(\n    opts: {onlySelf?: boolean; emitEvent?: boolean; sourceControl?: AbstractControl} = {},\n  ): void {\n    const changed = this.touched === true;\n    (this as Writable<this>).touched = false;\n    this._pendingTouched = false;\n\n    const sourceControl = opts.sourceControl ?? this;\n    this._forEachChild((control: AbstractControl) => {\n      control.markAsUntouched({onlySelf: true, emitEvent: opts.emitEvent, sourceControl});\n    });\n\n    if (this._parent && !opts.onlySelf) {\n      this._parent._updateTouched(opts, sourceControl);\n    }\n\n    if (changed && opts.emitEvent !== false) {\n      this._events.next(new TouchedChangeEvent(false, sourceControl));\n    }\n  }\n\n  /**\n   * Marks the control as `dirty`. A control becomes dirty when\n   * the control's value is changed through the UI; compare `markAsTouched`.\n   *\n   * @see {@link markAsTouched()}\n   * @see {@link markAsUntouched()}\n   * @see {@link markAsPristine()}\n   *\n   * @param opts Configuration options that determine how the control propagates changes\n   * and emits events after marking is applied.\n   * * `onlySelf`: When true, mark only this control. When false or not supplied,\n   * marks all direct ancestors. Default is false.\n   * * `emitEvent`: When true or not supplied (the default), the `events`\n   * observable emits a `PristineChangeEvent` with the `pristine` property being `false`.\n   * When false, no events are emitted.\n   */\n  markAsDirty(opts?: {onlySelf?: boolean; emitEvent?: boolean}): void;\n  /**\n   * @internal Used to propagate the source control downwards\n   */\n  markAsDirty(opts: {\n    onlySelf?: boolean;\n    emitEvent?: boolean;\n    sourceControl?: AbstractControl;\n  }): void;\n  markAsDirty(\n    opts: {onlySelf?: boolean; emitEvent?: boolean; sourceControl?: AbstractControl} = {},\n  ): void {\n    const changed = this.pristine === true;\n    (this as Writable<this>).pristine = false;\n\n    const sourceControl = opts.sourceControl ?? this;\n    if (this._parent && !opts.onlySelf) {\n      this._parent.markAsDirty({...opts, sourceControl});\n    }\n\n    if (changed && opts.emitEvent !== false) {\n      this._events.next(new PristineChangeEvent(false, sourceControl));\n    }\n  }\n\n  /**\n   * Marks the control as `pristine`.\n   *\n   * If the control has any children, marks all children as `pristine`,\n   * and recalculates the `pristine` status of all parent\n   * controls.\n   *\n   * @see {@link markAsTouched()}\n   * @see {@link markAsUntouched()}\n   * @see {@link markAsDirty()}\n   *\n   * @param opts Configuration options that determine how the control emits events after\n   * marking is applied.\n   * * `onlySelf`: When true, mark only this control. When false or not supplied,\n   * marks all direct ancestors. Default is false.\n   * * `emitEvent`: When true or not supplied (the default), the `events`\n   * observable emits a `PristineChangeEvent` with the `pristine` property being `true`.\n   * When false, no events are emitted.\n   */\n  markAsPristine(opts?: {onlySelf?: boolean; emitEvent?: boolean}): void;\n  /**\n   * @internal Used to propagate the source control downwards\n   */\n  markAsPristine(opts: {\n    onlySelf?: boolean;\n    emitEvent?: boolean;\n    sourceControl?: AbstractControl;\n  }): void;\n  markAsPristine(\n    opts: {onlySelf?: boolean; emitEvent?: boolean; sourceControl?: AbstractControl} = {},\n  ): void {\n    const changed = this.pristine === false;\n    (this as Writable<this>).pristine = true;\n    this._pendingDirty = false;\n\n    const sourceControl = opts.sourceControl ?? this;\n    this._forEachChild((control: AbstractControl) => {\n      /** We don't propagate the source control downwards */\n      control.markAsPristine({onlySelf: true, emitEvent: opts.emitEvent});\n    });\n\n    if (this._parent && !opts.onlySelf) {\n      this._parent._updatePristine(opts, sourceControl);\n    }\n\n    if (changed && opts.emitEvent !== false) {\n      this._events.next(new PristineChangeEvent(true, sourceControl));\n    }\n  }\n\n  /**\n   * Marks the control as `pending`.\n   *\n   * A control is pending while the control performs async validation.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   * @param opts Configuration options that determine how the control propagates changes and\n   * emits events after marking is applied.\n   * * `onlySelf`: When true, mark only this control. When false or not supplied,\n   * marks all direct ancestors. Default is false.\n   * * `emitEvent`: When true or not supplied (the default), the `statusChanges`\n   * observable emits an event with the latest status the control is marked pending\n   * and the `events` observable emits a `StatusChangeEvent` with the `status` property being\n   * `PENDING` When false, no events are emitted.\n   *\n   */\n  markAsPending(opts?: {onlySelf?: boolean; emitEvent?: boolean}): void;\n  /**\n   * @internal Used to propagate the source control downwards\n   */\n  markAsPending(opts: {\n    onlySelf?: boolean;\n    emitEvent?: boolean;\n    sourceControl?: AbstractControl;\n  }): void;\n  markAsPending(\n    opts: {onlySelf?: boolean; emitEvent?: boolean; sourceControl?: AbstractControl} = {},\n  ): void {\n    (this as Writable<this>).status = PENDING;\n\n    const sourceControl = opts.sourceControl ?? this;\n    if (opts.emitEvent !== false) {\n      this._events.next(new StatusChangeEvent(this.status, sourceControl));\n      (this.statusChanges as EventEmitter<FormControlStatus>).emit(this.status);\n    }\n\n    if (this._parent && !opts.onlySelf) {\n      this._parent.markAsPending({...opts, sourceControl});\n    }\n  }\n\n  /**\n   * Disables the control. This means the control is exempt from validation checks and\n   * excluded from the aggregate value of any parent. Its status is `DISABLED`.\n   *\n   * If the control has children, all children are also disabled.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   * @param opts Configuration options that determine how the control propagates\n   * changes and emits events after the control is disabled.\n   * * `onlySelf`: When true, mark only this control. When false or not supplied,\n   * marks all direct ancestors. Default is false.\n   * * `emitEvent`: When true or not supplied (the default), the `statusChanges`,\n   * `valueChanges` and `events`\n   * observables emit events with the latest status and value when the control is disabled.\n   * When false, no events are emitted.\n   */\n  disable(opts?: {onlySelf?: boolean; emitEvent?: boolean}): void;\n  /**\n   * @internal Used to propagate the source control downwards\n   */\n  disable(opts: {onlySelf?: boolean; emitEvent?: boolean; sourceControl?: AbstractControl}): void;\n  disable(\n    opts: {onlySelf?: boolean; emitEvent?: boolean; sourceControl?: AbstractControl} = {},\n  ): void {\n    // If parent has been marked artificially dirty we don't want to re-calculate the\n    // parent's dirtiness based on the children.\n    const skipPristineCheck = this._parentMarkedDirty(opts.onlySelf);\n\n    (this as Writable<this>).status = DISABLED;\n    (this as Writable<this>).errors = null;\n    this._forEachChild((control: AbstractControl) => {\n      /** We don't propagate the source control downwards */\n      control.disable({...opts, onlySelf: true});\n    });\n    this._updateValue();\n\n    const sourceControl = opts.sourceControl ?? this;\n    if (opts.emitEvent !== false) {\n      this._events.next(new ValueChangeEvent(this.value, sourceControl));\n      this._events.next(new StatusChangeEvent(this.status, sourceControl));\n      (this.valueChanges as EventEmitter<TValue>).emit(this.value);\n      (this.statusChanges as EventEmitter<FormControlStatus>).emit(this.status);\n    }\n\n    this._updateAncestors({...opts, skipPristineCheck}, this);\n    this._onDisabledChange.forEach((changeFn) => changeFn(true));\n  }\n\n  /**\n   * Enables the control. This means the control is included in validation checks and\n   * the aggregate value of its parent. Its status recalculates based on its value and\n   * its validators.\n   *\n   * By default, if the control has children, all children are enabled.\n   *\n   * @see {@link AbstractControl.status}\n   *\n   * @param opts Configure options that control how the control propagates changes and\n   * emits events when marked as untouched\n   * * `onlySelf`: When true, mark only this control. When false or not supplied,\n   * marks all direct ancestors. Default is false.\n   * * `emitEvent`: When true or not supplied (the default), the `statusChanges`,\n   * `valueChanges` and `events`\n   * observables emit events with the latest status and value when the control is enabled.\n   * When false, no events are emitted.\n   */\n  enable(opts: {onlySelf?: boolean; emitEvent?: boolean} = {}): void {\n    // If parent has been marked artificially dirty we don't want to re-calculate the\n    // parent's dirtiness based on the children.\n    const skipPristineCheck = this._parentMarkedDirty(opts.onlySelf);\n\n    (this as Writable<this>).status = VALID;\n    this._forEachChild((control: AbstractControl) => {\n      control.enable({...opts, onlySelf: true});\n    });\n    this.updateValueAndValidity({onlySelf: true, emitEvent: opts.emitEvent});\n\n    this._updateAncestors({...opts, skipPristineCheck}, this);\n    this._onDisabledChange.forEach((changeFn) => changeFn(false));\n  }\n\n  private _updateAncestors(\n    opts: {onlySelf?: boolean; emitEvent?: boolean; skipPristineCheck?: boolean},\n    sourceControl: AbstractControl,\n  ): void {\n    if (this._parent && !opts.onlySelf) {\n      this._parent.updateValueAndValidity(opts);\n      if (!opts.skipPristineCheck) {\n        this._parent._updatePristine({}, sourceControl);\n      }\n      this._parent._updateTouched({}, sourceControl);\n    }\n  }\n\n  /**\n   * Sets the parent of the control\n   *\n   * @param parent The new parent.\n   */\n  setParent(parent: FormGroup | FormArray | null): void {\n    this._parent = parent;\n  }\n\n  /**\n   * Sets the value of the control. Abstract method (implemented in sub-classes).\n   */\n  abstract setValue(value: TRawValue, options?: Object): void;\n\n  /**\n   * Patches the value of the control. Abstract method (implemented in sub-classes).\n   */\n  abstract patchValue(value: TValue, options?: Object): void;\n\n  /**\n   * Resets the control. Abstract method (implemented in sub-classes).\n   */\n  abstract reset(value?: TValue, options?: Object): void;\n\n  /**\n   * The raw value of this control. For most control implementations, the raw value will include\n   * disabled children.\n   */\n  getRawValue(): any {\n    return this.value;\n  }\n\n  /**\n   * Recalculates the value and validation status of the control.\n   *\n   * By default, it also updates the value and validity of its ancestors.\n   *\n   * @param opts Configuration options determine how the control propagates changes and emits events\n   * after updates and validity checks are applied.\n   * * `onlySelf`: When true, only update this control. When false or not supplied,\n   * update all direct ancestors. Default is false.\n   * * `emitEvent`: When true or not supplied (the default), the `statusChanges`,\n   * `valueChanges` and `events`\n   * observables emit events with the latest status and value when the control is updated.\n   * When false, no events are emitted.\n   */\n  updateValueAndValidity(opts?: {onlySelf?: boolean; emitEvent?: boolean}): void;\n  /**\n   * @internal Used to propagate the source control downwards\n   */\n  updateValueAndValidity(opts: {\n    onlySelf?: boolean;\n    emitEvent?: boolean;\n    sourceControl?: AbstractControl;\n  }): void;\n  updateValueAndValidity(\n    opts: {onlySelf?: boolean; emitEvent?: boolean; sourceControl?: AbstractControl} = {},\n  ): void {\n    this._setInitialStatus();\n    this._updateValue();\n\n    if (this.enabled) {\n      const shouldHaveEmitted = this._cancelExistingSubscription();\n\n      (this as Writable<this>).errors = this._runValidator();\n      (this as Writable<this>).status = this._calculateStatus();\n\n      if (this.status === VALID || this.status === PENDING) {\n        // If the canceled subscription should have emitted\n        // we make sure the async validator emits the status change on completion\n        this._runAsyncValidator(shouldHaveEmitted, opts.emitEvent);\n      }\n    }\n\n    const sourceControl = opts.sourceControl ?? this;\n    if (opts.emitEvent !== false) {\n      this._events.next(new ValueChangeEvent<TValue>(this.value, sourceControl));\n      this._events.next(new StatusChangeEvent(this.status, sourceControl));\n      (this.valueChanges as EventEmitter<TValue>).emit(this.value);\n      (this.statusChanges as EventEmitter<FormControlStatus>).emit(this.status);\n    }\n\n    if (this._parent && !opts.onlySelf) {\n      this._parent.updateValueAndValidity({...opts, sourceControl});\n    }\n  }\n\n  /** @internal */\n  _updateTreeValidity(opts: {emitEvent?: boolean} = {emitEvent: true}): void {\n    this._forEachChild((ctrl: AbstractControl) => ctrl._updateTreeValidity(opts));\n    this.updateValueAndValidity({onlySelf: true, emitEvent: opts.emitEvent});\n  }\n\n  private _setInitialStatus() {\n    (this as Writable<this>).status = this._allControlsDisabled() ? DISABLED : VALID;\n  }\n\n  private _runValidator(): ValidationErrors | null {\n    return this.validator ? this.validator(this) : null;\n  }\n\n  private _runAsyncValidator(shouldHaveEmitted: boolean, emitEvent?: boolean): void {\n    if (this.asyncValidator) {\n      (this as Writable<this>).status = PENDING;\n      this._hasOwnPendingAsyncValidator = {emitEvent: emitEvent !== false};\n      const obs = toObservable(this.asyncValidator(this));\n      this._asyncValidationSubscription = obs.subscribe((errors: ValidationErrors | null) => {\n        this._hasOwnPendingAsyncValidator = null;\n        // This will trigger the recalculation of the validation status, which depends on\n        // the state of the asynchronous validation (whether it is in progress or not). So, it is\n        // necessary that we have updated the `_hasOwnPendingAsyncValidator` boolean flag first.\n        this.setErrors(errors, {emitEvent, shouldHaveEmitted});\n      });\n    }\n  }\n\n  private _cancelExistingSubscription(): boolean {\n    if (this._asyncValidationSubscription) {\n      this._asyncValidationSubscription.unsubscribe();\n\n      // we're cancelling the validator subscribtion, we keep if it should have emitted\n      // because we want to emit eventually if it was required at least once.\n      const shouldHaveEmitted = this._hasOwnPendingAsyncValidator?.emitEvent ?? false;\n      this._hasOwnPendingAsyncValidator = null;\n      return shouldHaveEmitted;\n    }\n    return false;\n  }\n\n  /**\n   * Sets errors on a form control when running validations manually, rather than automatically.\n   *\n   * Calling `setErrors` also updates the validity of the parent control.\n   *\n   * @param opts Configuration options that determine how the control propagates\n   * changes and emits events after the control errors are set.\n   * * `emitEvent`: When true or not supplied (the default), the `statusChanges`\n   * observable emits an event after the errors are set.\n   *\n   * @usageNotes\n   *\n   * ### Manually set the errors for a control\n   *\n   * ```\n   * const login = new FormControl('someLogin');\n   * login.setErrors({\n   *   notUnique: true\n   * });\n   *\n   * expect(login.valid).toEqual(false);\n   * expect(login.errors).toEqual({ notUnique: true });\n   *\n   * login.setValue('someOtherLogin');\n   *\n   * expect(login.valid).toEqual(true);\n   * ```\n   */\n  setErrors(errors: ValidationErrors | null, opts?: {emitEvent?: boolean}): void;\n\n  /** @internal */\n  setErrors(\n    errors: ValidationErrors | null,\n    opts?: {emitEvent?: boolean; shouldHaveEmitted?: boolean},\n  ): void;\n  setErrors(\n    errors: ValidationErrors | null,\n    opts: {emitEvent?: boolean; shouldHaveEmitted?: boolean} = {},\n  ): void {\n    (this as Writable<this>).errors = errors;\n    this._updateControlsErrors(opts.emitEvent !== false, this, opts.shouldHaveEmitted);\n  }\n\n  /**\n   * Retrieves a child control given the control's name or path.\n   *\n   * This signature for get supports strings and `const` arrays (`.get(['foo', 'bar'] as const)`).\n   */\n  get<P extends string | readonly (string | number)[]>(\n    path: P,\n  ): AbstractControl<ɵGetProperty<TRawValue, P>> | null;\n\n  /**\n   * Retrieves a child control given the control's name or path.\n   *\n   * This signature for `get` supports non-const (mutable) arrays. Inferred type\n   * information will not be as robust, so prefer to pass a `readonly` array if possible.\n   */\n  get<P extends string | Array<string | number>>(\n    path: P,\n  ): AbstractControl<ɵGetProperty<TRawValue, P>> | null;\n\n  /**\n   * Retrieves a child control given the control's name or path.\n   *\n   * @param path A dot-delimited string or array of string/number values that define the path to the\n   * control. If a string is provided, passing it as a string literal will result in improved type\n   * information. Likewise, if an array is provided, passing it `as const` will cause improved type\n   * information to be available.\n   *\n   * @usageNotes\n   * ### Retrieve a nested control\n   *\n   * For example, to get a `name` control nested within a `person` sub-group:\n   *\n   * * `this.form.get('person.name');`\n   *\n   * -OR-\n   *\n   * * `this.form.get(['person', 'name'] as const);` // `as const` gives improved typings\n   *\n   * ### Retrieve a control in a FormArray\n   *\n   * When accessing an element inside a FormArray, you can use an element index.\n   * For example, to get a `price` control from the first element in an `items` array you can use:\n   *\n   * * `this.form.get('items.0.price');`\n   *\n   * -OR-\n   *\n   * * `this.form.get(['items', 0, 'price']);`\n   */\n  get<P extends string | (string | number)[]>(\n    path: P,\n  ): AbstractControl<ɵGetProperty<TRawValue, P>> | null {\n    let currPath: Array<string | number> | string = path;\n    if (currPath == null) return null;\n    if (!Array.isArray(currPath)) currPath = currPath.split('.');\n    if (currPath.length === 0) return null;\n    return currPath.reduce(\n      (control: AbstractControl | null, name) => control && control._find(name),\n      this,\n    );\n  }\n\n  /**\n   * @description\n   * Reports error data for the control with the given path.\n   *\n   * @param errorCode The code of the error to check\n   * @param path A list of control names that designates how to move from the current control\n   * to the control that should be queried for errors.\n   *\n   * @usageNotes\n   * For example, for the following `FormGroup`:\n   *\n   * ```\n   * form = new FormGroup({\n   *   address: new FormGroup({ street: new FormControl() })\n   * });\n   * ```\n   *\n   * The path to the 'street' control from the root form would be 'address' -> 'street'.\n   *\n   * It can be provided to this method in one of two formats:\n   *\n   * 1. An array of string control names, e.g. `['address', 'street']`\n   * 1. A period-delimited list of control names in one string, e.g. `'address.street'`\n   *\n   * @returns error data for that particular error. If the control or error is not present,\n   * null is returned.\n   */\n  getError(errorCode: string, path?: Array<string | number> | string): any {\n    const control = path ? this.get(path) : this;\n    return control && control.errors ? control.errors[errorCode] : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control with the given path has the error specified.\n   *\n   * @param errorCode The code of the error to check\n   * @param path A list of control names that designates how to move from the current control\n   * to the control that should be queried for errors.\n   *\n   * @usageNotes\n   * For example, for the following `FormGroup`:\n   *\n   * ```\n   * form = new FormGroup({\n   *   address: new FormGroup({ street: new FormControl() })\n   * });\n   * ```\n   *\n   * The path to the 'street' control from the root form would be 'address' -> 'street'.\n   *\n   * It can be provided to this method in one of two formats:\n   *\n   * 1. An array of string control names, e.g. `['address', 'street']`\n   * 1. A period-delimited list of control names in one string, e.g. `'address.street'`\n   *\n   * If no path is given, this method checks for the error on the current control.\n   *\n   * @returns whether the given error is present in the control at the given path.\n   *\n   * If the control is not present, false is returned.\n   */\n  hasError(errorCode: string, path?: Array<string | number> | string): boolean {\n    return !!this.getError(errorCode, path);\n  }\n\n  /**\n   * Retrieves the top-level ancestor of this control.\n   */\n  get root(): AbstractControl {\n    let x: AbstractControl = this;\n\n    while (x._parent) {\n      x = x._parent;\n    }\n\n    return x;\n  }\n\n  /** @internal */\n  _updateControlsErrors(\n    emitEvent: boolean,\n    changedControl: AbstractControl,\n    shouldHaveEmitted?: boolean,\n  ): void {\n    (this as Writable<this>).status = this._calculateStatus();\n\n    if (emitEvent) {\n      (this.statusChanges as EventEmitter<FormControlStatus>).emit(this.status);\n    }\n\n    // The Events Observable expose a slight different bevahior than the statusChanges obs\n    // An async validator will still emit a StatusChangeEvent is a previously cancelled\n    // async validator has emitEvent set to true\n    if (emitEvent || shouldHaveEmitted) {\n      this._events.next(new StatusChangeEvent(this.status, changedControl));\n    }\n\n    if (this._parent) {\n      this._parent._updateControlsErrors(emitEvent, changedControl, shouldHaveEmitted);\n    }\n  }\n\n  /** @internal */\n  _initObservables() {\n    (this as Writable<this>).valueChanges = new EventEmitter();\n    (this as Writable<this>).statusChanges = new EventEmitter();\n  }\n\n  private _calculateStatus(): FormControlStatus {\n    if (this._allControlsDisabled()) return DISABLED;\n    if (this.errors) return INVALID;\n    if (this._hasOwnPendingAsyncValidator || this._anyControlsHaveStatus(PENDING)) return PENDING;\n    if (this._anyControlsHaveStatus(INVALID)) return INVALID;\n    return VALID;\n  }\n\n  /** @internal */\n  abstract _updateValue(): void;\n\n  /** @internal */\n  abstract _forEachChild(cb: (c: AbstractControl) => void): void;\n\n  /** @internal */\n  abstract _anyControls(condition: (c: AbstractControl) => boolean): boolean;\n\n  /** @internal */\n  abstract _allControlsDisabled(): boolean;\n\n  /** @internal */\n  abstract _syncPendingControls(): boolean;\n\n  /** @internal */\n  _anyControlsHaveStatus(status: FormControlStatus): boolean {\n    return this._anyControls((control: AbstractControl) => control.status === status);\n  }\n\n  /** @internal */\n  _anyControlsDirty(): boolean {\n    return this._anyControls((control: AbstractControl) => control.dirty);\n  }\n\n  /** @internal */\n  _anyControlsTouched(): boolean {\n    return this._anyControls((control: AbstractControl) => control.touched);\n  }\n\n  /** @internal */\n  _updatePristine(opts: {onlySelf?: boolean}, changedControl: AbstractControl): void {\n    const newPristine = !this._anyControlsDirty();\n    const changed = this.pristine !== newPristine;\n    (this as Writable<this>).pristine = newPristine;\n\n    if (this._parent && !opts.onlySelf) {\n      this._parent._updatePristine(opts, changedControl);\n    }\n\n    if (changed) {\n      this._events.next(new PristineChangeEvent(this.pristine, changedControl));\n    }\n  }\n\n  /** @internal */\n  _updateTouched(opts: {onlySelf?: boolean} = {}, changedControl: AbstractControl): void {\n    (this as Writable<this>).touched = this._anyControlsTouched();\n    this._events.next(new TouchedChangeEvent(this.touched, changedControl));\n\n    if (this._parent && !opts.onlySelf) {\n      this._parent._updateTouched(opts, changedControl);\n    }\n  }\n\n  /** @internal */\n  _onDisabledChange: Array<(isDisabled: boolean) => void> = [];\n\n  /** @internal */\n  _registerOnCollectionChange(fn: () => void): void {\n    this._onCollectionChange = fn;\n  }\n\n  /** @internal */\n  _setUpdateStrategy(opts?: ValidatorFn | ValidatorFn[] | AbstractControlOptions | null): void {\n    if (isOptionsObj(opts) && opts.updateOn != null) {\n      this._updateOn = opts.updateOn!;\n    }\n  }\n  /**\n   * Check to see if parent has been marked artificially dirty.\n   *\n   * @internal\n   */\n  private _parentMarkedDirty(onlySelf?: boolean): boolean {\n    const parentDirty = this._parent && this._parent.dirty;\n    return !onlySelf && !!parentDirty && !this._parent!._anyControlsDirty();\n  }\n\n  /** @internal */\n  _find(name: string | number): AbstractControl | null {\n    return null;\n  }\n\n  /**\n   * Internal implementation of the `setValidators` method. Needs to be separated out into a\n   * different method, because it is called in the constructor and it can break cases where\n   * a control is extended.\n   */\n  private _assignValidators(validators: ValidatorFn | ValidatorFn[] | null): void {\n    this._rawValidators = Array.isArray(validators) ? validators.slice() : validators;\n    this._composedValidatorFn = coerceToValidator(this._rawValidators);\n  }\n\n  /**\n   * Internal implementation of the `setAsyncValidators` method. Needs to be separated out into a\n   * different method, because it is called in the constructor and it can break cases where\n   * a control is extended.\n   */\n  private _assignAsyncValidators(validators: AsyncValidatorFn | AsyncValidatorFn[] | null): void {\n    this._rawAsyncValidators = Array.isArray(validators) ? validators.slice() : validators;\n    this._composedAsyncValidatorFn = coerceToAsyncValidator(this._rawAsyncValidators);\n  }\n}\n"]}
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