/** * @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, Input, Optional, Self } from '@angular/core'; import { FormGroup } from '../model/form_group'; import { composeAsyncValidators, composeValidators, NG_ASYNC_VALIDATORS, NG_VALIDATORS } from '../validators'; import { ControlContainer } from './control_container'; import { setUpControl, setUpFormContainer, syncPendingControls } from './shared'; import * as i0 from "@angular/core"; export const formDirectiveProvider = { provide: ControlContainer, useExisting: forwardRef(() => NgForm) }; const resolvedPromise = (() => Promise.resolve())(); /** * @description * Creates a top-level `FormGroup` instance and binds it to a form * to track aggregate form value and validation status. * * As soon as you import the `FormsModule`, this directive becomes active by default on * all `
` tags. You don't need to add a special selector. * * You optionally export the directive into a local template variable using `ngForm` as the key * (ex: `#myForm="ngForm"`). This is optional, but useful. Many properties from the underlying * `FormGroup` instance are duplicated on the directive itself, so a reference to it * gives you access to the aggregate value and validity status of the form, as well as * user interaction properties like `dirty` and `touched`. * * To register child controls with the form, use `NgModel` with a `name` * attribute. You may use `NgModelGroup` to create sub-groups within the form. * * If necessary, listen to the directive's `ngSubmit` event to be notified when the user has * triggered a form submission. The `ngSubmit` event emits the original form * submission event. * * In template driven forms, all `` tags are automatically tagged as `NgForm`. * To import the `FormsModule` but skip its usage in some forms, * for example, to use native HTML5 validation, add the `ngNoForm` and the `` * tags won't create an `NgForm` directive. In reactive forms, using `ngNoForm` is * unnecessary because the `` tags are inert. In that case, you would * refrain from using the `formGroup` directive. * * @usageNotes * * ### Listening for form submission * * The following example shows how to capture the form values from the "ngSubmit" event. * * {@example forms/ts/simpleForm/simple_form_example.ts region='Component'} * * ### Setting the update options * * The following example shows you how to change the "updateOn" option from its default using * ngFormOptions. * * ```html * * *
* ``` * * ### Native DOM validation UI * * In order to prevent the native DOM form validation UI from interfering with Angular's form * validation, Angular automatically adds the `novalidate` attribute on any `
` whenever * `FormModule` or `ReactiveFormModule` are imported into the application. * If you want to explicitly enable native DOM validation UI with Angular forms, you can add the * `ngNativeValidate` attribute to the `` element: * * ```html * * ... *
* ``` * * @ngModule FormsModule * @publicApi */ export class NgForm extends ControlContainer { constructor(validators, asyncValidators) { super(); /** * @description * Returns whether the form submission has been triggered. */ this.submitted = false; this._directives = new Set(); /** * @description * Event emitter for the "ngSubmit" event */ this.ngSubmit = new EventEmitter(); this.form = new FormGroup({}, composeValidators(validators), composeAsyncValidators(asyncValidators)); } /** @nodoc */ ngAfterViewInit() { this._setUpdateStrategy(); } /** * @description * The directive instance. */ get formDirective() { return this; } /** * @description * The internal `FormGroup` instance. */ get control() { return this.form; } /** * @description * Returns an array representing the path to this group. Because this directive * always lives at the top level of a form, it is always an empty array. */ get path() { return []; } /** * @description * Returns a map of the controls in this group. */ get controls() { return this.form.controls; } /** * @description * Method that sets up the control directive in this group, re-calculates its value * and validity, and adds the instance to the internal list of directives. * * @param dir The `NgModel` directive instance. */ addControl(dir) { resolvedPromise.then(() => { const container = this._findContainer(dir.path); dir.control = container.registerControl(dir.name, dir.control); setUpControl(dir.control, dir); dir.control.updateValueAndValidity({ emitEvent: false }); this._directives.add(dir); }); } /** * @description * Retrieves the `FormControl` instance from the provided `NgModel` directive. * * @param dir The `NgModel` directive instance. */ getControl(dir) { return this.form.get(dir.path); } /** * @description * Removes the `NgModel` instance from the internal list of directives * * @param dir The `NgModel` directive instance. */ removeControl(dir) { resolvedPromise.then(() => { const container = this._findContainer(dir.path); if (container) { container.removeControl(dir.name); } this._directives.delete(dir); }); } /** * @description * Adds a new `NgModelGroup` directive instance to the form. * * @param dir The `NgModelGroup` directive instance. */ addFormGroup(dir) { resolvedPromise.then(() => { const container = this._findContainer(dir.path); const group = new FormGroup({}); setUpFormContainer(group, dir); container.registerControl(dir.name, group); group.updateValueAndValidity({ emitEvent: false }); }); } /** * @description * Removes the `NgModelGroup` directive instance from the form. * * @param dir The `NgModelGroup` directive instance. */ removeFormGroup(dir) { resolvedPromise.then(() => { const container = this._findContainer(dir.path); if (container) { container.removeControl(dir.name); } }); } /** * @description * Retrieves the `FormGroup` for a provided `NgModelGroup` directive instance * * @param dir The `NgModelGroup` directive instance. */ getFormGroup(dir) { return this.form.get(dir.path); } /** * Sets the new value for the provided `NgControl` directive. * * @param dir The `NgControl` directive instance. * @param value The new value for the directive's control. */ updateModel(dir, value) { resolvedPromise.then(() => { const ctrl = this.form.get(dir.path); ctrl.setValue(value); }); } /** * @description * Sets the value for this `FormGroup`. * * @param value The new value */ setValue(value) { this.control.setValue(value); } /** * @description * Method called when the "submit" event is triggered on the form. * Triggers the `ngSubmit` emitter to emit the "submit" event as its payload. * * @param $event The "submit" event object */ onSubmit($event) { this.submitted = true; syncPendingControls(this.form, this._directives); this.ngSubmit.emit($event); // Forms with `method="dialog"` have some special behavior // that won't reload the page and that shouldn't be prevented. return $event?.target?.method === 'dialog'; } /** * @description * Method called when the "reset" event is triggered on the form. */ onReset() { this.resetForm(); } /** * @description * Resets the form to an initial value and resets its submitted status. * * @param value The new value for the form. */ resetForm(value = undefined) { this.form.reset(value); this.submitted = false; } _setUpdateStrategy() { if (this.options && this.options.updateOn != null) { this.form._updateOn = this.options.updateOn; } } _findContainer(path) { path.pop(); return path.length ? this.form.get(path) : this.form; } } NgForm.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "14.2.8", ngImport: i0, type: NgForm, deps: [{ token: NG_VALIDATORS, optional: true, self: true }, { token: NG_ASYNC_VALIDATORS, optional: true, self: true }], target: i0.ɵɵFactoryTarget.Directive }); NgForm.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "14.2.8", type: NgForm, selector: "form:not([ngNoForm]):not([formGroup]),ng-form,[ngForm]", inputs: { options: ["ngFormOptions", "options"] }, outputs: { ngSubmit: "ngSubmit" }, host: { listeners: { "submit": "onSubmit($event)", "reset": "onReset()" } }, providers: [formDirectiveProvider], exportAs: ["ngForm"], usesInheritance: true, ngImport: i0 }); i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "14.2.8", ngImport: i0, type: NgForm, decorators: [{ type: Directive, args: [{ selector: 'form:not([ngNoForm]):not([formGroup]),ng-form,[ngForm]', providers: [formDirectiveProvider], host: { '(submit)': 'onSubmit($event)', '(reset)': 'onReset()' }, outputs: ['ngSubmit'], 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] }] }]; }, propDecorators: { options: [{ type: Input, args: ['ngFormOptions'] }] } }); //# 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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 {AfterViewInit, Directive, EventEmitter, forwardRef, Inject, Input, Optional, Self} from '@angular/core';\n\nimport {AbstractControl, FormHooks} from '../model/abstract_model';\nimport {FormControl} from '../model/form_control';\nimport {FormGroup} from '../model/form_group';\nimport {composeAsyncValidators, composeValidators, NG_ASYNC_VALIDATORS, NG_VALIDATORS} from '../validators';\n\nimport {ControlContainer} from './control_container';\nimport {Form} from './form_interface';\nimport {NgControl} from './ng_control';\nimport {NgModel} from './ng_model';\nimport {NgModelGroup} from './ng_model_group';\nimport {setUpControl, setUpFormContainer, syncPendingControls} from './shared';\nimport {AsyncValidator, AsyncValidatorFn, Validator, ValidatorFn} from './validators';\n\nexport const formDirectiveProvider: any = {\n  provide: ControlContainer,\n  useExisting: forwardRef(() => NgForm)\n};\n\nconst resolvedPromise = (() => Promise.resolve())();\n\n/**\n * @description\n * Creates a top-level `FormGroup` instance and binds it to a form\n * to track aggregate form value and validation status.\n *\n * As soon as you import the `FormsModule`, this directive becomes active by default on\n * all `<form>` tags.  You don't need to add a special selector.\n *\n * You optionally export the directive into a local template variable using `ngForm` as the key\n * (ex: `#myForm=\"ngForm\"`). This is optional, but useful.  Many properties from the underlying\n * `FormGroup` instance are duplicated on the directive itself, so a reference to it\n * gives you access to the aggregate value and validity status of the form, as well as\n * user interaction properties like `dirty` and `touched`.\n *\n * To register child controls with the form, use `NgModel` with a `name`\n * attribute. You may use `NgModelGroup` to create sub-groups within the form.\n *\n * If necessary, listen to the directive's `ngSubmit` event to be notified when the user has\n * triggered a form submission. The `ngSubmit` event emits the original form\n * submission event.\n *\n * In template driven forms, all `<form>` tags are automatically tagged as `NgForm`.\n * To import the `FormsModule` but skip its usage in some forms,\n * for example, to use native HTML5 validation, add the `ngNoForm` and the `<form>`\n * tags won't create an `NgForm` directive. In reactive forms, using `ngNoForm` is\n * unnecessary because the `<form>` tags are inert. In that case, you would\n * refrain from using the `formGroup` directive.\n *\n * @usageNotes\n *\n * ### Listening for form submission\n *\n * The following example shows how to capture the form values from the \"ngSubmit\" event.\n *\n * {@example forms/ts/simpleForm/simple_form_example.ts region='Component'}\n *\n * ### Setting the update options\n *\n * The following example shows you how to change the \"updateOn\" option from its default using\n * ngFormOptions.\n *\n * ```html\n * <form [ngFormOptions]=\"{updateOn: 'blur'}\">\n *    <input name=\"one\" ngModel>  <!-- this ngModel will update on blur -->\n * </form>\n * ```\n *\n * ### Native DOM validation UI\n *\n * In order to prevent the native DOM form validation UI from interfering with Angular's form\n * validation, Angular automatically adds the `novalidate` attribute on any `<form>` whenever\n * `FormModule` or `ReactiveFormModule` are imported into the application.\n * If you want to explicitly enable native DOM validation UI with Angular forms, you can add the\n * `ngNativeValidate` attribute to the `<form>` element:\n *\n * ```html\n * <form ngNativeValidate>\n *   ...\n * </form>\n * ```\n *\n * @ngModule FormsModule\n * @publicApi\n */\n@Directive({\n  selector: 'form:not([ngNoForm]):not([formGroup]),ng-form,[ngForm]',\n  providers: [formDirectiveProvider],\n  host: {'(submit)': 'onSubmit($event)', '(reset)': 'onReset()'},\n  outputs: ['ngSubmit'],\n  exportAs: 'ngForm'\n})\nexport class NgForm extends ControlContainer implements Form, AfterViewInit {\n  /**\n   * @description\n   * Returns whether the form submission has been triggered.\n   */\n  public readonly submitted: boolean = false;\n\n  private _directives = new Set<NgModel>();\n\n  /**\n   * @description\n   * The `FormGroup` instance created for this form.\n   */\n  form: FormGroup;\n\n  /**\n   * @description\n   * Event emitter for the \"ngSubmit\" event\n   */\n  ngSubmit = new EventEmitter();\n\n  /**\n   * @description\n   * Tracks options for the `NgForm` instance.\n   *\n   * **updateOn**: Sets the default `updateOn` value for all child `NgModels` below it\n   * unless explicitly set by a child `NgModel` using `ngModelOptions`). Defaults to 'change'.\n   * Possible values: `'change'` | `'blur'` | `'submit'`.\n   *\n   */\n  // TODO(issue/24571): remove '!'.\n  @Input('ngFormOptions') options!: {updateOn?: FormHooks};\n\n  constructor(\n      @Optional() @Self() @Inject(NG_VALIDATORS) validators: (Validator|ValidatorFn)[],\n      @Optional() @Self() @Inject(NG_ASYNC_VALIDATORS) asyncValidators:\n          (AsyncValidator|AsyncValidatorFn)[]) {\n    super();\n    this.form =\n        new FormGroup({}, composeValidators(validators), composeAsyncValidators(asyncValidators));\n  }\n\n  /** @nodoc */\n  ngAfterViewInit() {\n    this._setUpdateStrategy();\n  }\n\n  /**\n   * @description\n   * The directive instance.\n   */\n  override get formDirective(): Form {\n    return this;\n  }\n\n  /**\n   * @description\n   * The internal `FormGroup` instance.\n   */\n  override get control(): FormGroup {\n    return this.form;\n  }\n\n  /**\n   * @description\n   * Returns an array representing the path to this group. Because this directive\n   * always lives at the top level of a form, it is always an empty array.\n   */\n  override get path(): string[] {\n    return [];\n  }\n\n  /**\n   * @description\n   * Returns a map of the controls in this group.\n   */\n  get controls(): {[key: string]: AbstractControl} {\n    return this.form.controls;\n  }\n\n  /**\n   * @description\n   * Method that sets up the control directive in this group, re-calculates its value\n   * and validity, and adds the instance to the internal list of directives.\n   *\n   * @param dir The `NgModel` directive instance.\n   */\n  addControl(dir: NgModel): void {\n    resolvedPromise.then(() => {\n      const container = this._findContainer(dir.path);\n      (dir as {control: FormControl}).control =\n          <FormControl>container.registerControl(dir.name, dir.control);\n      setUpControl(dir.control, dir);\n      dir.control.updateValueAndValidity({emitEvent: false});\n      this._directives.add(dir);\n    });\n  }\n\n  /**\n   * @description\n   * Retrieves the `FormControl` instance from the provided `NgModel` directive.\n   *\n   * @param dir The `NgModel` directive instance.\n   */\n  getControl(dir: NgModel): FormControl {\n    return <FormControl>this.form.get(dir.path);\n  }\n\n  /**\n   * @description\n   * Removes the `NgModel` instance from the internal list of directives\n   *\n   * @param dir The `NgModel` directive instance.\n   */\n  removeControl(dir: NgModel): void {\n    resolvedPromise.then(() => {\n      const container = this._findContainer(dir.path);\n      if (container) {\n        container.removeControl(dir.name);\n      }\n      this._directives.delete(dir);\n    });\n  }\n\n  /**\n   * @description\n   * Adds a new `NgModelGroup` directive instance to the form.\n   *\n   * @param dir The `NgModelGroup` directive instance.\n   */\n  addFormGroup(dir: NgModelGroup): void {\n    resolvedPromise.then(() => {\n      const container = this._findContainer(dir.path);\n      const group = new FormGroup({});\n      setUpFormContainer(group, dir);\n      container.registerControl(dir.name, group);\n      group.updateValueAndValidity({emitEvent: false});\n    });\n  }\n\n  /**\n   * @description\n   * Removes the `NgModelGroup` directive instance from the form.\n   *\n   * @param dir The `NgModelGroup` directive instance.\n   */\n  removeFormGroup(dir: NgModelGroup): void {\n    resolvedPromise.then(() => {\n      const container = this._findContainer(dir.path);\n      if (container) {\n        container.removeControl(dir.name);\n      }\n    });\n  }\n\n  /**\n   * @description\n   * Retrieves the `FormGroup` for a provided `NgModelGroup` directive instance\n   *\n   * @param dir The `NgModelGroup` directive instance.\n   */\n  getFormGroup(dir: NgModelGroup): FormGroup {\n    return <FormGroup>this.form.get(dir.path);\n  }\n\n  /**\n   * Sets the new value for the provided `NgControl` directive.\n   *\n   * @param dir The `NgControl` directive instance.\n   * @param value The new value for the directive's control.\n   */\n  updateModel(dir: NgControl, value: any): void {\n    resolvedPromise.then(() => {\n      const ctrl = <FormControl>this.form.get(dir.path!);\n      ctrl.setValue(value);\n    });\n  }\n\n  /**\n   * @description\n   * Sets the value for this `FormGroup`.\n   *\n   * @param value The new value\n   */\n  setValue(value: {[key: string]: any}): void {\n    this.control.setValue(value);\n  }\n\n  /**\n   * @description\n   * Method called when the \"submit\" event is triggered on the form.\n   * Triggers the `ngSubmit` emitter to emit the \"submit\" event as its payload.\n   *\n   * @param $event The \"submit\" event object\n   */\n  onSubmit($event: Event): boolean {\n    (this as {submitted: boolean}).submitted = true;\n    syncPendingControls(this.form, this._directives);\n    this.ngSubmit.emit($event);\n    // Forms with `method=\"dialog\"` have some special behavior\n    // that won't reload the page and that shouldn't be prevented.\n    return ($event?.target as HTMLFormElement | null)?.method === 'dialog';\n  }\n\n  /**\n   * @description\n   * Method called when the \"reset\" event is triggered on the form.\n   */\n  onReset(): void {\n    this.resetForm();\n  }\n\n  /**\n   * @description\n   * Resets the form to an initial value and resets its submitted status.\n   *\n   * @param value The new value for the form.\n   */\n  resetForm(value: any = undefined): void {\n    this.form.reset(value);\n    (this as {submitted: boolean}).submitted = false;\n  }\n\n  private _setUpdateStrategy() {\n    if (this.options && this.options.updateOn != null) {\n      this.form._updateOn = this.options.updateOn;\n    }\n  }\n\n  private _findContainer(path: string[]): FormGroup {\n    path.pop();\n    return path.length ? <FormGroup>this.form.get(path) : this.form;\n  }\n}\n"]}