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docs(upgrade): expand upon change detection implications for downgraded components (#39100) 

PR Close #39100
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Alison 2020-10-02 14:39:08 -07:00 committed by Joey Perrott
parent 89c5255b8c
commit 4beaddcb83
1 changed files with 9 additions and 0 deletions
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aio/content/guide/upgrade.md
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@ -479,6 +479,15 @@ using the `downgradeComponent()` method. The result is an AngularJS
<code-example path="upgrade-module/src/app/downgrade-static/app.module.ts" region="downgradecomponent" header="app.module.ts">
</code-example>
<div class="alert is-helpful">
By default, Angular change detection will also run on the component for every
AngularJS `$digest` cycle. If you wish to only have change detection run when
the inputs change, you can set `propagateDigest` to `false` when calling
`downgradeComponent()`.
</div>
Because `HeroDetailComponent` is an Angular component, you must also add it to the
`declarations` in the `AppModule`.