| 1 | {"version":3,"file":"stepper.js","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"],"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\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: boolean) {\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: boolean) {\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: boolean) {\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: boolean) {\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 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 static ngAcceptInputType_editable: BooleanInput;\n static ngAcceptInputType_hasError: BooleanInput;\n static ngAcceptInputType_optional: BooleanInput;\n static ngAcceptInputType_completed: BooleanInput;\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: boolean) {\n this._linear = coerceBooleanProperty(value);\n }\n private _linear = false;\n\n /** The index of the selected step. */\n @Input()\n get selectedIndex() {\n return this._selectedIndex;\n }\n set selectedIndex(index: number) {\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(index) && (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 (this._selectedIndex !== newIndex && !this._anyControlsInvalidOrPending(newIndex) &&\n (newIndex >= this._selectedIndex || this.steps.toArray()[newIndex].editable)) {\n this._updateSelectedItemIndex(index);\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 { return this._orientation; }\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, 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 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(headers.toArray().sort((a, b) => {\n const documentPosition =\n a._elementRef.nativeElement.compareDocumentPosition(b._elementRef.nativeElement);\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 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 ? 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, isCurrentStep: boolean, state: StepState = STEP_STATE.NUMBER): 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() ? 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 (manager.activeItemIndex != null && !hasModifier &&\n (keyCode === SPACE || keyCode === ENTER)) {\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.toArray().slice(0, index).some(step => {\n const control = step.stepControl;\n const isIncomplete =\n control ? (control.invalid || control.pending || !step.interacted) : !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 static ngAcceptInputType_editable: BooleanInput;\n static ngAcceptInputType_optional: BooleanInput;\n static ngAcceptInputType_completed: BooleanInput;\n static ngAcceptInputType_hasError: BooleanInput;\n static ngAcceptInputType_linear: BooleanInput;\n static ngAcceptInputType_selectedIndex: NumberInput;\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 |\n ((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 |\n ((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, HostListener, 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 }\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 // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.\n // In Ivy the `host` bindings will be merged when this class is extended, whereas in\n // ViewEngine they're overwritten.\n // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.\n // tslint:disable-next-line:no-host-decorator-in-concrete\n @HostListener('click')\n _handleClick() {\n this._stepper.next();\n }\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 }\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 // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.\n // In Ivy the `host` bindings will be merged when this class is extended, whereas in\n // ViewEngine they're overwritten.\n // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.\n // tslint:disable-next-line:no-host-decorator-in-concrete\n @HostListener('click')\n _handleClick() {\n this._stepper.previous();\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 {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: [\n CdkStep,\n CdkStepper,\n CdkStepHeader,\n CdkStepLabel,\n CdkStepperNext,\n CdkStepperPrevious,\n ],\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 * Generated bundle index. Do not edit.\n */\n\nexport * from 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