@angular/cdk/fesm2015/stepper.mjs.map

Angular Material Component Development Kit

{"version":3,"file":"stepper.mjs","sources":["../../../../../../src/cdk/stepper/step-header.ts","../../../../../../src/cdk/stepper/step-label.ts","../../../../../../src/cdk/stepper/stepper.ts","../../../../../../src/cdk/stepper/stepper-button.ts","../../../../../../src/cdk/stepper/stepper-module.ts","../../../../../../src/cdk/stepper/public-api.ts","../../../../../../src/cdk/stepper/index.ts","../../../../../../src/cdk/stepper/stepper_public_index.ts"],"sourcesContent":["/**\n * @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, ElementRef} from '@angular/core';\nimport {FocusableOption} from '@angular/cdk/a11y';\n\n@Directive({\n  selector: '[cdkStepHeader]',\n  host: {\n    'role': 'tab',\n  },\n})\nexport class CdkStepHeader implements FocusableOption {\n  constructor(public _elementRef: ElementRef<HTMLElement>) {}\n\n  /** Focuses the step header. */\n  focus() {\n    this._elementRef.nativeElement.focus();\n  }\n}\n","/**\n * @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, TemplateRef} from '@angular/core';\n\n@Directive({\n  selector: '[cdkStepLabel]',\n})\nexport class CdkStepLabel {\n  constructor(/** @docs-private */ public template: TemplateRef<any>) {}\n}\n","/**\n * @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 {FocusableOption, FocusKeyManager} from '@angular/cdk/a11y';\nimport {Direction, Directionality} from '@angular/cdk/bidi';\nimport {\n  BooleanInput,\n  coerceBooleanProperty,\n  coerceNumberProperty,\n  NumberInput,\n} from '@angular/cdk/coercion';\nimport {ENTER, hasModifierKey, SPACE} from '@angular/cdk/keycodes';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  AfterViewInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChild,\n  ContentChildren,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  forwardRef,\n  Inject,\n  InjectionToken,\n  Input,\n  OnChanges,\n  OnDestroy,\n  Optional,\n  Output,\n  QueryList,\n  TemplateRef,\n  ViewChild,\n  ViewEncapsulation,\n  AfterContentInit,\n} from '@angular/core';\nimport {_getFocusedElementPierceShadowDom} from '@angular/cdk/platform';\nimport {Observable, of as observableOf, Subject} from 'rxjs';\nimport {startWith, takeUntil} from 'rxjs/operators';\n\nimport {CdkStepHeader} from './step-header';\nimport {CdkStepLabel} from './step-label';\n\n/** Used to generate unique ID for each stepper component. */\nlet nextId = 0;\n\n/**\n * Position state of the content of each step in stepper that is used for transitioning\n * the content into correct position upon step selection change.\n */\nexport type StepContentPositionState = 'previous' | 'current' | 'next';\n\n/** Possible orientation of a stepper. */\nexport type StepperOrientation = 'horizontal' | 'vertical';\n\n/** Change event emitted on selection changes. */\nexport class StepperSelectionEvent {\n  /** Index of the step now selected. */\n  selectedIndex: number;\n\n  /** Index of the step previously selected. */\n  previouslySelectedIndex: number;\n\n  /** The step instance now selected. */\n  selectedStep: CdkStep;\n\n  /** The step instance previously selected. */\n  previouslySelectedStep: CdkStep;\n}\n\n/** The state of each step. */\nexport type StepState = 'number' | 'edit' | 'done' | 'error' | string;\n\n/** Enum to represent the different states of the steps. */\nexport const STEP_STATE = {\n  NUMBER: 'number',\n  EDIT: 'edit',\n  DONE: 'done',\n  ERROR: 'error',\n};\n\n/** InjectionToken that can be used to specify the global stepper options. */\nexport const STEPPER_GLOBAL_OPTIONS = new InjectionToken<StepperOptions>('STEPPER_GLOBAL_OPTIONS');\n\n/** Configurable options for stepper. */\nexport interface StepperOptions {\n  /**\n   * Whether the stepper should display an error state or not.\n   * Default behavior is assumed to be false.\n   */\n  showError?: boolean;\n\n  /**\n   * Whether the stepper should display the default indicator type\n   * or not.\n   * Default behavior is assumed to be true.\n   */\n  displayDefaultIndicatorType?: boolean;\n}\n\n@Component({\n  selector: 'cdk-step',\n  exportAs: 'cdkStep',\n  template: '<ng-template><ng-content></ng-content></ng-template>',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class CdkStep implements OnChanges {\n  private _stepperOptions: StepperOptions;\n  _displayDefaultIndicatorType: boolean;\n\n  /** Template for step label if it exists. */\n  @ContentChild(CdkStepLabel) stepLabel: CdkStepLabel;\n\n  /** Template for step content. */\n  @ViewChild(TemplateRef, {static: true}) content: TemplateRef<any>;\n\n  /** The top level abstract control of the step. */\n  @Input() stepControl: AbstractControlLike;\n\n  /** Whether user has attempted to move away from the step. */\n  interacted = false;\n\n  /** Emits when the user has attempted to move away from the step. */\n  @Output('interacted')\n  readonly interactedStream: EventEmitter<CdkStep> = new EventEmitter<CdkStep>();\n\n  /** Plain text label of the step. */\n  @Input() label: string;\n\n  /** Error message to display when there's an error. */\n  @Input() errorMessage: string;\n\n  /** Aria label for the tab. */\n  @Input('aria-label') ariaLabel: string;\n\n  /**\n   * Reference to the element that the tab is labelled by.\n   * Will be cleared if `aria-label` is set at the same time.\n   */\n  @Input('aria-labelledby') ariaLabelledby: string;\n\n  /** State of the step. */\n  @Input() state: StepState;\n\n  /** Whether the user can return to this step once it has been marked as completed. */\n  @Input()\n  get editable(): boolean {\n    return this._editable;\n  }\n  set editable(value: BooleanInput) {\n    this._editable = coerceBooleanProperty(value);\n  }\n  private _editable = true;\n\n  /** Whether the completion of step is optional. */\n  @Input()\n  get optional(): boolean {\n    return this._optional;\n  }\n  set optional(value: BooleanInput) {\n    this._optional = coerceBooleanProperty(value);\n  }\n  private _optional = false;\n\n  /** Whether step is marked as completed. */\n  @Input()\n  get completed(): boolean {\n    return this._completedOverride == null ? this._getDefaultCompleted() : this._completedOverride;\n  }\n  set completed(value: BooleanInput) {\n    this._completedOverride = coerceBooleanProperty(value);\n  }\n  _completedOverride: boolean | null = null;\n\n  private _getDefaultCompleted() {\n    return this.stepControl ? this.stepControl.valid && this.interacted : this.interacted;\n  }\n\n  /** Whether step has an error. */\n  @Input()\n  get hasError(): boolean {\n    return this._customError == null ? this._getDefaultError() : this._customError;\n  }\n  set hasError(value: BooleanInput) {\n    this._customError = coerceBooleanProperty(value);\n  }\n  private _customError: boolean | null = null;\n\n  private _getDefaultError() {\n    return this.stepControl && this.stepControl.invalid && this.interacted;\n  }\n\n  constructor(\n    @Inject(forwardRef(() => CdkStepper)) public _stepper: CdkStepper,\n    @Optional() @Inject(STEPPER_GLOBAL_OPTIONS) stepperOptions?: StepperOptions,\n  ) {\n    this._stepperOptions = stepperOptions ? stepperOptions : {};\n    this._displayDefaultIndicatorType = this._stepperOptions.displayDefaultIndicatorType !== false;\n  }\n\n  /** Selects this step component. */\n  select(): void {\n    this._stepper.selected = this;\n  }\n\n  /** Resets the step to its initial state. Note that this includes resetting form data. */\n  reset(): void {\n    this.interacted = false;\n\n    if (this._completedOverride != null) {\n      this._completedOverride = false;\n    }\n\n    if (this._customError != null) {\n      this._customError = false;\n    }\n\n    if (this.stepControl) {\n      this.stepControl.reset();\n    }\n  }\n\n  ngOnChanges() {\n    // Since basically all inputs of the MatStep get proxied through the view down to the\n    // underlying MatStepHeader, we have to make sure that change detection runs correctly.\n    this._stepper._stateChanged();\n  }\n\n  _markAsInteracted() {\n    if (!this.interacted) {\n      this.interacted = true;\n      this.interactedStream.emit(this);\n    }\n  }\n\n  /** Determines whether the error state can be shown. */\n  _showError(): boolean {\n    // We want to show the error state either if the user opted into/out of it using the\n    // global options, or if they've explicitly set it through the `hasError` input.\n    return this._stepperOptions.showError ?? this._customError != null;\n  }\n}\n\n@Directive({\n  selector: '[cdkStepper]',\n  exportAs: 'cdkStepper',\n})\nexport class CdkStepper implements AfterContentInit, AfterViewInit, OnDestroy {\n  /** Emits when the component is destroyed. */\n  protected readonly _destroyed = new Subject<void>();\n\n  /** Used for managing keyboard focus. */\n  private _keyManager: FocusKeyManager<FocusableOption>;\n\n  /** Full list of steps inside the stepper, including inside nested steppers. */\n  @ContentChildren(CdkStep, {descendants: true}) _steps: QueryList<CdkStep>;\n\n  /** Steps that belong to the current stepper, excluding ones from nested steppers. */\n  readonly steps: QueryList<CdkStep> = new QueryList<CdkStep>();\n\n  /** The list of step headers of the steps in the stepper. */\n  @ContentChildren(CdkStepHeader, {descendants: true}) _stepHeader: QueryList<CdkStepHeader>;\n\n  /** List of step headers sorted based on their DOM order. */\n  private _sortedHeaders = new QueryList<CdkStepHeader>();\n\n  /** Whether the validity of previous steps should be checked or not. */\n  @Input()\n  get linear(): boolean {\n    return this._linear;\n  }\n  set linear(value: BooleanInput) {\n    this._linear = coerceBooleanProperty(value);\n  }\n  private _linear = false;\n\n  /** The index of the selected step. */\n  @Input()\n  get selectedIndex(): number {\n    return this._selectedIndex;\n  }\n  set selectedIndex(index: NumberInput) {\n    const newIndex = coerceNumberProperty(index);\n\n    if (this.steps && this._steps) {\n      // Ensure that the index can't be out of bounds.\n      if (!this._isValidIndex(newIndex) && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n        throw Error('cdkStepper: Cannot assign out-of-bounds value to `selectedIndex`.');\n      }\n\n      this.selected?._markAsInteracted();\n\n      if (\n        this._selectedIndex !== newIndex &&\n        !this._anyControlsInvalidOrPending(newIndex) &&\n        (newIndex >= this._selectedIndex || this.steps.toArray()[newIndex].editable)\n      ) {\n        this._updateSelectedItemIndex(newIndex);\n      }\n    } else {\n      this._selectedIndex = newIndex;\n    }\n  }\n  private _selectedIndex = 0;\n\n  /** The step that is selected. */\n  @Input()\n  get selected(): CdkStep | undefined {\n    return this.steps ? this.steps.toArray()[this.selectedIndex] : undefined;\n  }\n  set selected(step: CdkStep | undefined) {\n    this.selectedIndex = step && this.steps ? this.steps.toArray().indexOf(step) : -1;\n  }\n\n  /** Event emitted when the selected step has changed. */\n  @Output() readonly selectionChange = new EventEmitter<StepperSelectionEvent>();\n\n  /** Used to track unique ID for each stepper component. */\n  _groupId: number;\n\n  /** Orientation of the stepper. */\n  @Input()\n  get orientation(): StepperOrientation {\n    return this._orientation;\n  }\n  set orientation(value: StepperOrientation) {\n    // This is a protected method so that `MatSteppter` can hook into it.\n    this._orientation = value;\n\n    if (this._keyManager) {\n      this._keyManager.withVerticalOrientation(value === 'vertical');\n    }\n  }\n\n  /**\n   * @deprecated To be turned into a private property. Use `orientation` instead.\n   * @breaking-change 13.0.0\n   */\n  protected _orientation: StepperOrientation = 'horizontal';\n\n  constructor(\n    @Optional() private _dir: Directionality,\n    private _changeDetectorRef: ChangeDetectorRef,\n    private _elementRef: ElementRef<HTMLElement>,\n    /**\n     * @deprecated No longer in use, to be removed.\n     * @breaking-change 13.0.0\n     */\n    @Inject(DOCUMENT) _document: any,\n  ) {\n    this._groupId = nextId++;\n  }\n\n  ngAfterContentInit() {\n    this._steps.changes\n      .pipe(startWith(this._steps), takeUntil(this._destroyed))\n      .subscribe((steps: QueryList<CdkStep>) => {\n        this.steps.reset(steps.filter(step => step._stepper === this));\n        this.steps.notifyOnChanges();\n      });\n  }\n\n  ngAfterViewInit() {\n    // If the step headers are defined outside of the `ngFor` that renders the steps, like in the\n    // Material stepper, they won't appear in the `QueryList` in the same order as they're\n    // rendered in the DOM which will lead to incorrect keyboard navigation. We need to sort\n    // them manually to ensure that they're correct. Alternatively, we can change the Material\n    // template to inline the headers in the `ngFor`, but that'll result in a lot of\n    // code duplciation. See #23539.\n    this._stepHeader.changes\n      .pipe(startWith(this._stepHeader), takeUntil(this._destroyed))\n      .subscribe((headers: QueryList<CdkStepHeader>) => {\n        this._sortedHeaders.reset(\n          headers.toArray().sort((a, b) => {\n            const documentPosition = a._elementRef.nativeElement.compareDocumentPosition(\n              b._elementRef.nativeElement,\n            );\n\n            // `compareDocumentPosition` returns a bitmask so we have to use a bitwise operator.\n            // https://developer.mozilla.org/en-US/docs/Web/API/Node/compareDocumentPosition\n            // tslint:disable-next-line:no-bitwise\n            return documentPosition & Node.DOCUMENT_POSITION_FOLLOWING ? -1 : 1;\n          }),\n        );\n        this._sortedHeaders.notifyOnChanges();\n      });\n\n    // Note that while the step headers are content children by default, any components that\n    // extend this one might have them as view children. We initialize the keyboard handling in\n    // AfterViewInit so we're guaranteed for both view and content children to be defined.\n    this._keyManager = new FocusKeyManager<FocusableOption>(this._sortedHeaders)\n      .withWrap()\n      .withHomeAndEnd()\n      .withVerticalOrientation(this._orientation === 'vertical');\n\n    (this._dir ? (this._dir.change as Observable<Direction>) : observableOf<Direction>())\n      .pipe(startWith(this._layoutDirection()), takeUntil(this._destroyed))\n      .subscribe(direction => this._keyManager.withHorizontalOrientation(direction));\n\n    this._keyManager.updateActiveItem(this._selectedIndex);\n\n    // No need to `takeUntil` here, because we're the ones destroying `steps`.\n    this.steps.changes.subscribe(() => {\n      if (!this.selected) {\n        this._selectedIndex = Math.max(this._selectedIndex - 1, 0);\n      }\n    });\n\n    // The logic which asserts that the selected index is within bounds doesn't run before the\n    // steps are initialized, because we don't how many steps there are yet so we may have an\n    // invalid index on init. If that's the case, auto-correct to the default so we don't throw.\n    if (!this._isValidIndex(this._selectedIndex)) {\n      this._selectedIndex = 0;\n    }\n  }\n\n  ngOnDestroy() {\n    this.steps.destroy();\n    this._sortedHeaders.destroy();\n    this._destroyed.next();\n    this._destroyed.complete();\n  }\n\n  /** Selects and focuses the next step in list. */\n  next(): void {\n    this.selectedIndex = Math.min(this._selectedIndex + 1, this.steps.length - 1);\n  }\n\n  /** Selects and focuses the previous step in list. */\n  previous(): void {\n    this.selectedIndex = Math.max(this._selectedIndex - 1, 0);\n  }\n\n  /** Resets the stepper to its initial state. Note that this includes clearing form data. */\n  reset(): void {\n    this._updateSelectedItemIndex(0);\n    this.steps.forEach(step => step.reset());\n    this._stateChanged();\n  }\n\n  /** Returns a unique id for each step label element. */\n  _getStepLabelId(i: number): string {\n    return `cdk-step-label-${this._groupId}-${i}`;\n  }\n\n  /** Returns unique id for each step content element. */\n  _getStepContentId(i: number): string {\n    return `cdk-step-content-${this._groupId}-${i}`;\n  }\n\n  /** Marks the component to be change detected. */\n  _stateChanged() {\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /** Returns position state of the step with the given index. */\n  _getAnimationDirection(index: number): StepContentPositionState {\n    const position = index - this._selectedIndex;\n    if (position < 0) {\n      return this._layoutDirection() === 'rtl' ? 'next' : 'previous';\n    } else if (position > 0) {\n      return this._layoutDirection() === 'rtl' ? 'previous' : 'next';\n    }\n    return 'current';\n  }\n\n  /** Returns the type of icon to be displayed. */\n  _getIndicatorType(index: number, state: StepState = STEP_STATE.NUMBER): StepState {\n    const step = this.steps.toArray()[index];\n    const isCurrentStep = this._isCurrentStep(index);\n\n    return step._displayDefaultIndicatorType\n      ? this._getDefaultIndicatorLogic(step, isCurrentStep)\n      : this._getGuidelineLogic(step, isCurrentStep, state);\n  }\n\n  private _getDefaultIndicatorLogic(step: CdkStep, isCurrentStep: boolean): StepState {\n    if (step._showError() && step.hasError && !isCurrentStep) {\n      return STEP_STATE.ERROR;\n    } else if (!step.completed || isCurrentStep) {\n      return STEP_STATE.NUMBER;\n    } else {\n      return step.editable ? STEP_STATE.EDIT : STEP_STATE.DONE;\n    }\n  }\n\n  private _getGuidelineLogic(\n    step: CdkStep,\n    isCurrentStep: boolean,\n    state: StepState = STEP_STATE.NUMBER,\n  ): StepState {\n    if (step._showError() && step.hasError && !isCurrentStep) {\n      return STEP_STATE.ERROR;\n    } else if (step.completed && !isCurrentStep) {\n      return STEP_STATE.DONE;\n    } else if (step.completed && isCurrentStep) {\n      return state;\n    } else if (step.editable && isCurrentStep) {\n      return STEP_STATE.EDIT;\n    } else {\n      return state;\n    }\n  }\n\n  private _isCurrentStep(index: number) {\n    return this._selectedIndex === index;\n  }\n\n  /** Returns the index of the currently-focused step header. */\n  _getFocusIndex() {\n    return this._keyManager ? this._keyManager.activeItemIndex : this._selectedIndex;\n  }\n\n  private _updateSelectedItemIndex(newIndex: number): void {\n    const stepsArray = this.steps.toArray();\n    this.selectionChange.emit({\n      selectedIndex: newIndex,\n      previouslySelectedIndex: this._selectedIndex,\n      selectedStep: stepsArray[newIndex],\n      previouslySelectedStep: stepsArray[this._selectedIndex],\n    });\n\n    // If focus is inside the stepper, move it to the next header, otherwise it may become\n    // lost when the active step content is hidden. We can't be more granular with the check\n    // (e.g. checking whether focus is inside the active step), because we don't have a\n    // reference to the elements that are rendering out the content.\n    this._containsFocus()\n      ? this._keyManager.setActiveItem(newIndex)\n      : this._keyManager.updateActiveItem(newIndex);\n\n    this._selectedIndex = newIndex;\n    this._stateChanged();\n  }\n\n  _onKeydown(event: KeyboardEvent) {\n    const hasModifier = hasModifierKey(event);\n    const keyCode = event.keyCode;\n    const manager = this._keyManager;\n\n    if (\n      manager.activeItemIndex != null &&\n      !hasModifier &&\n      (keyCode === SPACE || keyCode === ENTER)\n    ) {\n      this.selectedIndex = manager.activeItemIndex;\n      event.preventDefault();\n    } else {\n      manager.onKeydown(event);\n    }\n  }\n\n  private _anyControlsInvalidOrPending(index: number): boolean {\n    if (this._linear && index >= 0) {\n      return this.steps\n        .toArray()\n        .slice(0, index)\n        .some(step => {\n          const control = step.stepControl;\n          const isIncomplete = control\n            ? control.invalid || control.pending || !step.interacted\n            : !step.completed;\n          return isIncomplete && !step.optional && !step._completedOverride;\n        });\n    }\n\n    return false;\n  }\n\n  private _layoutDirection(): Direction {\n    return this._dir && this._dir.value === 'rtl' ? 'rtl' : 'ltr';\n  }\n\n  /** Checks whether the stepper contains the focused element. */\n  private _containsFocus(): boolean {\n    const stepperElement = this._elementRef.nativeElement;\n    const focusedElement = _getFocusedElementPierceShadowDom();\n    return stepperElement === focusedElement || stepperElement.contains(focusedElement);\n  }\n\n  /** Checks whether the passed-in index is a valid step index. */\n  private _isValidIndex(index: number): boolean {\n    return index > -1 && (!this.steps || index < this.steps.length);\n  }\n}\n\n/**\n * Simplified representation of an \"AbstractControl\" from @angular/forms.\n * Used to avoid having to bring in @angular/forms for a single optional interface.\n * @docs-private\n */\ninterface AbstractControlLike {\n  asyncValidator: ((control: any) => any) | null;\n  dirty: boolean;\n  disabled: boolean;\n  enabled: boolean;\n  errors: {[key: string]: any} | null;\n  invalid: boolean;\n  parent: any;\n  pending: boolean;\n  pristine: boolean;\n  root: AbstractControlLike;\n  status: string;\n  readonly statusChanges: Observable<any>;\n  touched: boolean;\n  untouched: boolean;\n  updateOn: any;\n  valid: boolean;\n  validator: ((control: any) => any) | null;\n  value: any;\n  readonly valueChanges: Observable<any>;\n  clearAsyncValidators(): void;\n  clearValidators(): void;\n  disable(opts?: any): void;\n  enable(opts?: any): void;\n  get(path: (string | number)[] | string): AbstractControlLike | null;\n  getError(errorCode: string, path?: (string | number)[] | string): any;\n  hasError(errorCode: string, path?: (string | number)[] | string): boolean;\n  markAllAsTouched(): void;\n  markAsDirty(opts?: any): void;\n  markAsPending(opts?: any): void;\n  markAsPristine(opts?: any): void;\n  markAsTouched(opts?: any): void;\n  markAsUntouched(opts?: any): void;\n  patchValue(value: any, options?: Object): void;\n  reset(value?: any, options?: Object): void;\n  setAsyncValidators(newValidator: (control: any) => any | ((control: any) => any)[] | null): void;\n  setErrors(errors: {[key: string]: any} | null, opts?: any): void;\n  setParent(parent: any): void;\n  setValidators(newValidator: (control: any) => any | ((control: any) => any)[] | null): void;\n  setValue(value: any, options?: Object): void;\n  updateValueAndValidity(opts?: any): void;\n  patchValue(value: any, options?: any): void;\n  reset(formState?: any, options?: any): void;\n  setValue(value: any, options?: any): void;\n}\n","/**\n * @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, Input} from '@angular/core';\n\nimport {CdkStepper} from './stepper';\n\n/** Button that moves to the next step in a stepper workflow. */\n@Directive({\n  selector: 'button[cdkStepperNext]',\n  host: {\n    '[type]': 'type',\n    '(click)': '_stepper.next()',\n  },\n})\nexport class CdkStepperNext {\n  /** Type of the next button. Defaults to \"submit\" if not specified. */\n  @Input() type: string = 'submit';\n\n  constructor(public _stepper: CdkStepper) {}\n}\n\n/** Button that moves to the previous step in a stepper workflow. */\n@Directive({\n  selector: 'button[cdkStepperPrevious]',\n  host: {\n    '[type]': 'type',\n    '(click)': '_stepper.previous()',\n  },\n})\nexport class CdkStepperPrevious {\n  /** Type of the previous button. Defaults to \"button\" if not specified. */\n  @Input() type: string = 'button';\n\n  constructor(public _stepper: CdkStepper) {}\n}\n","/**\n * @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 {NgModule} from '@angular/core';\nimport {CdkStepper, CdkStep} from './stepper';\nimport {CdkStepLabel} from './step-label';\nimport {CdkStepperNext, CdkStepperPrevious} from './stepper-button';\nimport {CdkStepHeader} from './step-header';\nimport {BidiModule} from '@angular/cdk/bidi';\n\n@NgModule({\n  imports: [BidiModule],\n  exports: [CdkStep, CdkStepper, CdkStepHeader, CdkStepLabel, CdkStepperNext, CdkStepperPrevious],\n  declarations: [\n    CdkStep,\n    CdkStepper,\n    CdkStepHeader,\n    CdkStepLabel,\n    CdkStepperNext,\n    CdkStepperPrevious,\n  ],\n})\nexport class CdkStepperModule {}\n","/**\n * @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\nexport * from './stepper';\nexport * from './step-label';\nexport * from './stepper-button';\nexport * from './stepper-module';\nexport * from './step-header';\n","/**\n * @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\nexport * from './public-api';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from 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