Managing Subscriptions

in Angular

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1. 👨🏻‍🏫 Theory
2. 👨🏻‍💻 Examples
3. 💡 Best practices

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Subscription ? 🤨

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It’s an object that holds the Observable execution.

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MEMORY LEAKS

The component get destroyed

but the subscription lives on.

DEMO

💡 Best practices 

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✖️ Avoid nested .subscribe().

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✔️ Consider flattening operators instead.

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✖️ Avoid .subscribe() in constructors.

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✔️ Use lifecycle hooks instead.

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✖️ Avoid logic in .subscribe().

 Having logic in subscribe is usually an indicator that you're not using RxJS to its best potential.

✖️ Avoid subscription in services.

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✔️ Reduce view subscriptions.

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✖️ Don’t pass streams to components directly.

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Resources

📌 Rx Scavenger library

📌 Until Destroy library

📌 Don't unsubscribe blog post

📌 Managing Subscriptions in Angular blog post

📌 When To Subscribe? (Rarely) blog post

📌 Detecting Memory Leaks blog post

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Edouard Bozon

Angular, RxJS, NgRx, Node

🚴‍♂️ ⛷ 🍻

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