LeafletModule 无法解析为 Ivy 中的 NgModule 类答案

【问题标题】：LeafletModule could not be resolved to an NgModule class in IvyLeafletModule 无法解析为 Ivy 中的 NgModule 类
【发布时间】：2021-04-16 18:40:11
【问题描述】：

我正在使用 ngx-leaflet 开发一个 Angular 项目。在控制台运行ng serve后，出现如下错误：

Error: node_modules/@asymmetrik/ngx-leaflet/dist/leaflet/leaflet.module.d.ts:1:22 - error NG6002: Appears in the NgModule.imports of AppModule, but could not be resolved to an NgModule class.

This likely means that the library (@asymmetrik/ngx-leaflet) which declares LeafletModule has not been processed correctly by ngcc, or is not compatible with Angular Ivy. Check if a newer version of the library is available, and update if so. Also consider checking with the library's authors to see if the library is expected to be compatible with Ivy.

1 export declare class LeafletModule {
                       ~~~~~~~~~~~~~

在app.module.ts中导入：

import { LeafletModule } from '@asymmetrik/ngx-leaflet';

同样在 app.module.ts 的 @NgModule 中：

@NgModule({
  declarations: [
    ...
  ],
  imports: [
    ReactiveFormsModule,
    AngularFireModule.initializeApp(config),
    AngularFireAnalyticsModule,
    AngularFirestoreModule,
    AngularFireAuthModule,
    AngularFireStorageModule,
    AngularFireDatabaseModule,
    BrowserModule,
    AppRoutingModule,
    LeafletModule
  ],
  providers: [
    ...
  ],
  bootstrap: [AppComponent]
})

这是一个已知问题，还是我只是遗漏了一些东西并搞砸了导入？

版本信息：

Angular CLI: 11.0.6
Node: 12.18.3
OS: darwin x64

Angular: 10.0.8
... animations, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router
Ivy Workspace: Yes

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1100.6
@angular-devkit/build-angular   0.1100.6
@angular-devkit/core            11.0.6
@angular-devkit/schematics      11.0.6
@angular/cli                    11.0.6
@angular/fire                   6.0.2
@schematics/angular             11.0.6
@schematics/update              0.1100.6
rxjs                            6.5.5
typescript                      3.9.7

来自 package.json：

"@asymmetrik/ngx-leaflet": "^8.1.0",
"leaflet": "^1.7.1",

【问题讨论】：

标签： angular typescript ng-modules ngx-leaflet

【解决方案1】：

我将本地 Angular 版本更新为 11.0.8，现在导入工作正常。除了将 rxjs 更新为 6.6.3 之外，没有其他任何改变，我怀疑这是否相关。我想错误发生在10.0.8 上。

【讨论】：