来自ngrx的有关运行时检查的警告

本文介绍了来自ngrx的有关运行时检查的警告的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我使用ng update将我的应用程序从Angular 7升级到了Angular 8.当我通过ng serve运行它时，控制台上从ngrx打印了一个警告:

I upgraded my app from Angular 7 to Angular 8 using ng update. When I run it via ng serve, There's a warning printed in my console from ngrx:

@ngrx/store: runtime checks are currently opt-in but will be the default in the next major version with the possibility to opt-out, see https://ngrx.io/guide/migration/v8 for more information.

提供的链接上的文档讨论了不推荐使用的ngrx-store-freeze.但是，我的应用程序不使用ngrx-store-freeze，我也不知道什么是运行时检查".我需要在代码中进行哪些更改以解决此警告的来源?

The documentation at the provided link talks about ngrx-store-freeze being deprecated. However, my application does not use ngrx-store-freeze, and I have no idea what a "runtime check" is. What do I need to change in my code to address the source of this warning?

推荐答案

此警告即将到来是因为NGRX< 8，要使商店不可变，我们需要使用ngrx-store-freeze库.在NGRX 8中，您可以选择不使用ngrx-store-freeze而使存储不可变(因为它现在在NGRX 8中是内置的).如果通过在StoreModule.forRoot中指定runtimeChecks属性来选择店内不变性，则该警告将消失:

This warning is coming because in NGRX < 8, to make store immutable, we need to use ngrx-store-freeze library. In NGRX 8, you can opt-in to make store immutable without ngrx-store-freeze [as it is in build now in NGRX 8]. This warning will go away if you opt in-store immutability by specifying runtimeChecks property in StoreModule.forRoot like this:

StoreModule.forRoot(rootReducer, {
      runtimeChecks: {
        strictStateImmutability: true,
        strictActionImmutability: true
      }      
    })

示例:

@NgModule({
  imports: [
    CommonModule,
    StoreModule.forRoot(rootReducer, {
      runtimeChecks: {
        strictStateImmutability: true,
        strictActionImmutability: true
      }      
    }),
  ]
})
export class AppModule {}

参考: https://medium.com/ngrx/announcing-ngrx-version-8-ngrx-data-create-functions-runtime-checks-and-mock-selectors-a44fac112627

希望这会有所帮助.

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