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docs: include WrappedValue as removed API on deprecation page (#43685)

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A rebase of #43507 seems to have inadvertently dropped the note about
the removed `WrappedValue` API from the deprecations page, so this
commit reintroduces the text.

PR Close #43685
This commit is contained in:
JoostK
2021-10-02 22:16:21 +02:00
committed by Andrew Kushnir
parent 17c9f67e21
commit 5b9b740c20
1 changed files with 12 additions and 0 deletions
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aio/content/guide/deprecations.md
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@@ -704,6 +704,18 @@ Find more information about the replacement in the [`LoadChildrenCallback` docum
The supporting classes `NgModuleFactoryLoader`, `SystemJsNgModuleLoader` and `SystemJsNgModuleLoaderConfig` classes were removed from `@angular/core`, as well as `SpyNgModuleFactoryLoader` from `@angular/router`.
### `WrappedValue`
The purpose of `WrappedValue` was to allow the same object instance to be treated as different for the purposes of change detection.
It was commonly used with the `async` pipe in the case where the `Observable` produces the same instance of the value.
Given that this use case is relatively rare and special handling impacted application performance, the `WrappedValue` API has been removed in Angular 13.
If you rely on the behavior that the same object instance should cause change detection, you have two options:
- Clone the resulting value so that it has a new identity.
- Explicitly call [`ChangeDetectorRef.detectChanges()`](api/core/ChangeDetectorRef#detectchanges) to force the update.
<!-- links -->
[AioGuideI18nCommonMergeDefineLocalesInTheBuildConfiguration]: guide/i18n-common-merge#define-locales-in-the-build-configuration "Define locales in the build configuration - Common Internationalization task #6: Merge translations into the application | Angular"