@angular/forms
Version:
Angular - directives and services for creating forms
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JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { Directive, EventEmitter, forwardRef, Inject, InjectionToken, Input, Optional, Output, Self } from '@angular/core';
import { FormControl } from '../../model/form_control';
import { NG_ASYNC_VALIDATORS, NG_VALIDATORS } from '../../validators';
import { NG_VALUE_ACCESSOR } from '../control_value_accessor';
import { NgControl } from '../ng_control';
import { disabledAttrWarning } from '../reactive_errors';
import { _ngModelWarning, CALL_SET_DISABLED_STATE, cleanUpControl, isPropertyUpdated, selectValueAccessor, setUpControl } from '../shared';
import * as i0 from "@angular/core";
/**
* Token to provide to turn off the ngModel warning on formControl and formControlName.
*/
export const NG_MODEL_WITH_FORM_CONTROL_WARNING = new InjectionToken('NgModelWithFormControlWarning');
const formControlBinding = {
provide: NgControl,
useExisting: forwardRef(() => FormControlDirective)
};
/**
* @description
* Synchronizes a standalone `FormControl` instance to a form control element.
*
* Note that support for using the `ngModel` input property and `ngModelChange` event with reactive
* form directives was deprecated in Angular v6 and is scheduled for removal in
* a future version of Angular.
* For details, see [Deprecated features](guide/deprecations#ngmodel-with-reactive-forms).
*
* @see [Reactive Forms Guide](guide/reactive-forms)
* @see `FormControl`
* @see `AbstractControl`
*
* @usageNotes
*
* The following example shows how to register a standalone control and set its value.
*
* {@example forms/ts/simpleFormControl/simple_form_control_example.ts region='Component'}
*
* @ngModule ReactiveFormsModule
* @publicApi
*/
export class FormControlDirective extends NgControl {
/**
* @description
* Triggers a warning in dev mode that this input should not be used with reactive forms.
*/
set isDisabled(isDisabled) {
if (typeof ngDevMode === 'undefined' || ngDevMode) {
console.warn(disabledAttrWarning);
}
}
constructor(validators, asyncValidators, valueAccessors, _ngModelWarningConfig, callSetDisabledState) {
super();
this._ngModelWarningConfig = _ngModelWarningConfig;
this.callSetDisabledState = callSetDisabledState;
/** @deprecated as of v6 */
this.update = new EventEmitter();
/**
* @description
* Instance property used to track whether an ngModel warning has been sent out for this
* particular `FormControlDirective` instance. Used to support warning config of "always".
*
* @internal
*/
this._ngModelWarningSent = false;
this._setValidators(validators);
this._setAsyncValidators(asyncValidators);
this.valueAccessor = selectValueAccessor(this, valueAccessors);
}
/** @nodoc */
ngOnChanges(changes) {
if (this._isControlChanged(changes)) {
const previousForm = changes['form'].previousValue;
if (previousForm) {
cleanUpControl(previousForm, this, /* validateControlPresenceOnChange */ false);
}
setUpControl(this.form, this, this.callSetDisabledState);
this.form.updateValueAndValidity({ emitEvent: false });
}
if (isPropertyUpdated(changes, this.viewModel)) {
if (typeof ngDevMode === 'undefined' || ngDevMode) {
_ngModelWarning('formControl', FormControlDirective, this, this._ngModelWarningConfig);
}
this.form.setValue(this.model);
this.viewModel = this.model;
}
}
/** @nodoc */
ngOnDestroy() {
if (this.form) {
cleanUpControl(this.form, this, /* validateControlPresenceOnChange */ false);
}
}
/**
* @description
* Returns an array that represents the path from the top-level form to this control.
* Each index is the string name of the control on that level.
*/
get path() {
return [];
}
/**
* @description
* The `FormControl` bound to this directive.
*/
get control() {
return this.form;
}
/**
* @description
* Sets the new value for the view model and emits an `ngModelChange` event.
*
* @param newValue The new value for the view model.
*/
viewToModelUpdate(newValue) {
this.viewModel = newValue;
this.update.emit(newValue);
}
_isControlChanged(changes) {
return changes.hasOwnProperty('form');
}
}
/**
* @description
* Static property used to track whether any ngModel warnings have been sent across
* all instances of FormControlDirective. Used to support warning config of "once".
*
* @internal
*/
FormControlDirective._ngModelWarningSentOnce = false;
FormControlDirective.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "15.2.3", ngImport: i0, type: FormControlDirective, deps: [{ token: NG_VALIDATORS, optional: true, self: true }, { token: NG_ASYNC_VALIDATORS, optional: true, self: true }, { token: NG_VALUE_ACCESSOR, optional: true, self: true }, { token: NG_MODEL_WITH_FORM_CONTROL_WARNING, optional: true }, { token: CALL_SET_DISABLED_STATE, optional: true }], target: i0.ɵɵFactoryTarget.Directive });
FormControlDirective.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "15.2.3", type: FormControlDirective, selector: "[formControl]", inputs: { form: ["formControl", "form"], isDisabled: ["disabled", "isDisabled"], model: ["ngModel", "model"] }, outputs: { update: "ngModelChange" }, providers: [formControlBinding], exportAs: ["ngForm"], usesInheritance: true, usesOnChanges: true, ngImport: i0 });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "15.2.3", ngImport: i0, type: FormControlDirective, decorators: [{
type: Directive,
args: [{ selector: '[formControl]', providers: [formControlBinding], exportAs: 'ngForm' }]
}], ctorParameters: function () { return [{ type: undefined, decorators: [{
type: Optional
}, {
type: Self
}, {
type: Inject,
args: [NG_VALIDATORS]
}] }, { type: undefined, decorators: [{
type: Optional
}, {
type: Self
}, {
type: Inject,
args: [NG_ASYNC_VALIDATORS]
}] }, { type: undefined, decorators: [{
type: Optional
}, {
type: Self
}, {
type: Inject,
args: [NG_VALUE_ACCESSOR]
}] }, { type: undefined, decorators: [{
type: Optional
}, {
type: Inject,
args: [NG_MODEL_WITH_FORM_CONTROL_WARNING]
}] }, { type: undefined, decorators: [{
type: Optional
}, {
type: Inject,
args: [CALL_SET_DISABLED_STATE]
}] }]; }, propDecorators: { form: [{
type: Input,
args: ['formControl']
}], isDisabled: [{
type: Input,
args: ['disabled']
}], model: [{
type: Input,
args: ['ngModel']
}], update: [{
type: Output,
args: ['ngModelChange']
}] } });
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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 {Directive, EventEmitter, forwardRef, Inject, InjectionToken, Input, OnChanges, OnDestroy, Optional, Output, Provider, Self, SimpleChanges} from '@angular/core';\n\nimport {FormControl} from '../../model/form_control';\nimport {NG_ASYNC_VALIDATORS, NG_VALIDATORS} from '../../validators';\nimport {ControlValueAccessor, NG_VALUE_ACCESSOR} from '../control_value_accessor';\nimport {NgControl} from '../ng_control';\nimport {disabledAttrWarning} from '../reactive_errors';\nimport {_ngModelWarning, CALL_SET_DISABLED_STATE, cleanUpControl, isPropertyUpdated, selectValueAccessor, SetDisabledStateOption, setUpControl} from '../shared';\nimport {AsyncValidator, AsyncValidatorFn, Validator, ValidatorFn} from '../validators';\n\n\n/**\n * Token to provide to turn off the ngModel warning on formControl and formControlName.\n */\nexport const NG_MODEL_WITH_FORM_CONTROL_WARNING =\n    new InjectionToken('NgModelWithFormControlWarning');\n\nconst formControlBinding: Provider = {\n  provide: NgControl,\n  useExisting: forwardRef(() => FormControlDirective)\n};\n\n/**\n * @description\n * Synchronizes a standalone `FormControl` instance to a form control element.\n *\n * Note that support for using the `ngModel` input property and `ngModelChange` event with reactive\n * form directives was deprecated in Angular v6 and is scheduled for removal in\n * a future version of Angular.\n * For details, see [Deprecated features](guide/deprecations#ngmodel-with-reactive-forms).\n *\n * @see [Reactive Forms Guide](guide/reactive-forms)\n * @see `FormControl`\n * @see `AbstractControl`\n *\n * @usageNotes\n *\n * The following example shows how to register a standalone control and set its value.\n *\n * {@example forms/ts/simpleFormControl/simple_form_control_example.ts region='Component'}\n *\n * @ngModule ReactiveFormsModule\n * @publicApi\n */\n@Directive({selector: '[formControl]', providers: [formControlBinding], exportAs: 'ngForm'})\nexport class FormControlDirective extends NgControl implements OnChanges, OnDestroy {\n  /**\n   * Internal reference to the view model value.\n   * @nodoc\n   */\n  viewModel: any;\n\n  /**\n   * @description\n   * Tracks the `FormControl` instance bound to the directive.\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input('formControl') form!: FormControl;\n\n  /**\n   * @description\n   * Triggers a warning in dev mode that this input should not be used with reactive forms.\n   */\n  @Input('disabled')\n  set isDisabled(isDisabled: boolean) {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      console.warn(disabledAttrWarning);\n    }\n  }\n\n  // TODO(kara): remove next 4 properties once deprecation period is over\n\n  /** @deprecated as of v6 */\n  @Input('ngModel') model: any;\n\n  /** @deprecated as of v6 */\n  @Output('ngModelChange') update = new EventEmitter();\n\n  /**\n   * @description\n   * Static property used to track whether any ngModel warnings have been sent across\n   * all instances of FormControlDirective. Used to support warning config of \"once\".\n   *\n   * @internal\n   */\n  static _ngModelWarningSentOnce = false;\n\n  /**\n   * @description\n   * Instance property used to track whether an ngModel warning has been sent out for this\n   * particular `FormControlDirective` instance. Used to support warning config of \"always\".\n   *\n   * @internal\n   */\n  _ngModelWarningSent = false;\n\n  constructor(\n      @Optional() @Self() @Inject(NG_VALIDATORS) validators: (Validator|ValidatorFn)[],\n      @Optional() @Self() @Inject(NG_ASYNC_VALIDATORS) asyncValidators:\n          (AsyncValidator|AsyncValidatorFn)[],\n      @Optional() @Self() @Inject(NG_VALUE_ACCESSOR) valueAccessors: ControlValueAccessor[],\n      @Optional() @Inject(NG_MODEL_WITH_FORM_CONTROL_WARNING) private _ngModelWarningConfig: string|\n      null,\n      @Optional() @Inject(CALL_SET_DISABLED_STATE) private callSetDisabledState?:\n          SetDisabledStateOption) {\n    super();\n    this._setValidators(validators);\n    this._setAsyncValidators(asyncValidators);\n    this.valueAccessor = selectValueAccessor(this, valueAccessors);\n  }\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges): void {\n    if (this._isControlChanged(changes)) {\n      const previousForm = changes['form'].previousValue;\n      if (previousForm) {\n        cleanUpControl(previousForm, this, /* validateControlPresenceOnChange */ false);\n      }\n      setUpControl(this.form, this, this.callSetDisabledState);\n      this.form.updateValueAndValidity({emitEvent: false});\n    }\n    if (isPropertyUpdated(changes, this.viewModel)) {\n      if (typeof ngDevMode === 'undefined' || ngDevMode) {\n        _ngModelWarning('formControl', FormControlDirective, this, this._ngModelWarningConfig);\n      }\n      this.form.setValue(this.model);\n      this.viewModel = this.model;\n    }\n  }\n\n  /** @nodoc */\n  ngOnDestroy() {\n    if (this.form) {\n      cleanUpControl(this.form, this, /* validateControlPresenceOnChange */ false);\n    }\n  }\n\n  /**\n   * @description\n   * Returns an array that represents the path from the top-level form to this control.\n   * Each index is the string name of the control on that level.\n   */\n  override get path(): string[] {\n    return [];\n  }\n\n  /**\n   * @description\n   * The `FormControl` bound to this directive.\n   */\n  override get control(): FormControl {\n    return this.form;\n  }\n\n  /**\n   * @description\n   * Sets the new value for the view model and emits an `ngModelChange` event.\n   *\n   * @param newValue The new value for the view model.\n   */\n  override viewToModelUpdate(newValue: any): void {\n    this.viewModel = newValue;\n    this.update.emit(newValue);\n  }\n\n  private _isControlChanged(changes: {[key: string]: any}): boolean {\n    return changes.hasOwnProperty('form');\n  }\n}\n"]}