{"id":1271,"date":"2023-08-02T05:00:00","date_gmt":"2023-08-02T12:00:00","guid":{"rendered":"https:\/\/www.angulartraining.com\/daily-newsletter\/?p=1271"},"modified":"2023-07-31T12:17:30","modified_gmt":"2023-07-31T19:17:30","slug":"how-to-run-code-in-an-injection-context","status":"publish","type":"post","link":"https:\/\/www.angulartraining.com\/daily-newsletter\/how-to-run-code-in-an-injection-context\/","title":{"rendered":"How to run code in an injection context?"},"content":{"rendered":"\n

Yesterday, I introduced an injection context, and we saw a few locations where we could inject dependencies. This can be limiting in scenarios where we call a method that creates and returns an Observable outside of an injection context, as we can’t always initialize observables in a constructor. Does that mean we cannot use the takeUntilDestroyed<\/code> operator<\/a> in those scenarios?<\/p>\n\n\n\n

No, because we can store our injector for later use using the following approach:<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

<\/p>\n\n\n\n

The key is to use the runInInjectionContext<\/code> function<\/a> and pass the injector as a parameter.<\/p>\n\n\n\n

For the takeUntilDestroyed <\/code>operator, we can inject a DestroyRef<\/a><\/code> in our injection context and then use it as a parameter whenever we need that operator:<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n

<\/p>\n\n\n\n

Problem solved! We can use all these tools from the framework in any place we want, thanks to EnvironmentInjector<\/code> and DestroyRef<\/code>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Yesterday, I introduced an injection context, and we saw a few locations where we could inject dependencies. This can be limiting in scenarios where we call a method that creates and returns an Observable outside of an injection context, as we can’t always initialize observables in a constructor. Does that mean we cannot use the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,26],"tags":[],"class_list":["post-1271","post","type-post","status-publish","format-standard","hentry","category-angular","category-dependency-injection"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\t