Practical RxJS In The Wild 🦁— Requests with concatMap() vs mergeMap() vs forkJoin() 🥊
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I would like to share with you experience acquired by working on a yet another Hacker News client (code name HAKAFAKA 😂 still in alpha). I have been on the road for couple months now and realized that a small coding project wouldn’t hurt. And sure it didn’t, on the contrary it provided inspiration for this new post so let’s get straight to it!
Contextual intro
In most of the apps we are building we have to perform at least some requests to the backend. Retrieving data to show it to the user, updating entities, submitting forms or any other activity involving communication with the server.
Retrieving of collections
Most APIs provide endpoints for retrieving whole collections of items with single request. Think users, posts or transactions. For large collections it is usually also possible to retrieve a subset of all items by sending pagination information in query parameters.
When we’re developing our own API we are in full control and we should provide such endpoints because it reduces overhead…
