NgZone notifies Angular when to perform the change detection process (e.g. a DOM event with bound listener is one of the triggerers). However, if in response to an event you directly manipulate the DOM or simply perform an action which does not require bindings update, the process is redundant.

Undoubtedly, it’s a wide array of operators that makes the RxJS library extremely powerful utility in a developer’s tool belt. In this blog post, I will introduce you to the concept of custom RxJS operators and present exemplary implementations.

In Angular apps, the immutability term is mostly mentioned when you deal with the OnPush change detection strategy. Mutable update patterns may not only prevent you from taking advantage of narrowing a components tree subjected to the change detection, but it also leads to hard to spot bugs/gotchas.

I was recently working on a task requiring filtering and sorting data on the frontend side. I came across an issue that I wanted to debounce user input in order to decrease a number of filter and sort operations, however initial operation should be performed as soon as possible (without debounce).