feat(module:back-top): support standalone component (#8195)

* feat(module:back-top): support standalone component

* feat(module:back-top): support standalone component

Author: evgeniyefimov

components/back-top/back-top.component.ts

@@ -5,7 +5,7 @@
 
 import { Direction, Directionality } from '@angular/cdk/bidi';
 import { Platform, normalizePassiveListenerOptions } from '@angular/cdk/platform';
-import { DOCUMENT } from '@angular/common';
+import { DOCUMENT, NgIf, NgTemplateOutlet } from '@angular/common';
 import {
   ChangeDetectionStrategy,
   ChangeDetectorRef,
@@ -33,6 +33,7 @@ import { NzConfigKey, NzConfigService, WithConfig } from 'ng-zorro-antd/core/con
 import { NzDestroyService, NzScrollService } from 'ng-zorro-antd/core/services';
 import { NumberInput, NzSafeAny } from 'ng-zorro-antd/core/types';
 import { InputNumber } from 'ng-zorro-antd/core/util';
+import { NzIconModule } from 'ng-zorro-antd/icon';
 
 const NZ_CONFIG_MODULE_NAME: NzConfigKey = 'backTop';
 
@@ -42,6 +43,8 @@ const passiveEventListenerOptions = normalizePassiveListenerOptions({ passive: t
   selector: 'nz-back-top',
   exportAs: 'nzBackTop',
   animations: [fadeMotion],
+  standalone: true,
+  imports: [NgIf, NgTemplateOutlet, NzIconModule],
   template: `
     <div #backTop class="ant-back-top" [class.ant-back-top-rtl]="dir === 'rtl'" @fadeMotion *ngIf="visible">
       <ng-template #defaultContent>

components/back-top/back-top.module.ts

@@ -3,18 +3,12 @@
  * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
  */
 
-import { BidiModule } from '@angular/cdk/bidi';
-import { PlatformModule } from '@angular/cdk/platform';
-import { CommonModule } from '@angular/common';
 import { NgModule } from '@angular/core';
 
-import { NzIconModule } from 'ng-zorro-antd/icon';
-
 import { NzBackTopComponent } from './back-top.component';
 
 @NgModule({
-  declarations: [NzBackTopComponent],
   exports: [NzBackTopComponent],
-  imports: [BidiModule, CommonModule, PlatformModule, NzIconModule]
+  imports: [NzBackTopComponent]
 })
 export class NzBackTopModule {}

components/back-top/doc/index.en-US.md

@@ -18,7 +18,7 @@ import { NzBackTopModule } from 'ng-zorro-antd/back-top';
 
 ## API
 
-### nz-back-top
+### nz-back-top:standalone
 
 > The distance to the bottom is set to `50px` by default, which is overridable.
 > If you decide to use custom styles, please note the size limit: no more than `40px * 40px`.

components/back-top/doc/index.zh-CN.md

@@ -19,7 +19,7 @@ import { NzBackTopModule } from 'ng-zorro-antd/back-top';
 
 ## API
 
-### nz-back-top
+### nz-back-top:standalone
 
 > 有默认样式，距离底部 `50px`，可覆盖。
 > 自定义样式宽高不大于 `40px * 40px`。