Asynchronous handling of lifecycle hooks in TypeScript for Angular and Ionic applications

I'm intrigued by the idea of integrating TypeScript's async/await feature with lifecycle hooks.

While this feature is undeniably convenient, I find myself wondering if it's considered acceptable to make lifecycle hooks asynchronous.

After experimenting with this approach several times and observing that it works as expected, I'm still unsure if it aligns with best practices or not.

For example:

In an Angular context:

async ngOnInit() {
  await someAsyncFunction();
}

In an Ionic context:

async ionViewWillEnter() {
  await someAsyncFunction();
}

Answer №1

The idea of it being "relatively new" seems off to me - it's actually been around since version 2.1.

While the feature is undeniably convenient, some may question if making lifecycle hooks async is acceptable.

Many resources out there are exploring this topic (just search for async await ngOnInit). As far as Angular goes, there doesn't seem to be any indication that it's a problem. It's unclear how Ionic handles it though.

Despite my efforts, I couldn't find a definitive answer on whether this is considered good practice, and I worry that it might not be.

The thing about good practices is that they can vary based on personal opinion. In my view, using async await can greatly improve code readability. For another perspective and a more in-depth analysis, you might want to take a look at https://medium.com/@benlesh/async-await-it-s-good-and-bad-15cf121ade40.

Answer №2

In my experience, I have found no issues with utilizing async/await alongside Angular's life cycle hooks. To the best of my knowledge, it is not considered a bad programming practice either. I have personally used async in my life cycle methods without encountering any issues.

If you are uncertain, you can refer to this discussion for more insights: https://github.com/angular/angular/issues/17420

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