Angular Tips #2

The article continues the series on tips for working with Angular, focusing on advanced concepts. It assumes prior knowledge and experience with Angular and RxJS. The first tip is about retrieving the previous value of a BehaviorSubject, which can be done using the getValue() function or observables. Using getValue() is straightforward, but it may be forbidden in some projects. The observable approach uses the pipe operator with first() and tap() to achieve the same result without violating project rules. The second tip is about using the debounceTime operator to ensure that a source emits only once, even if the value is updated multiple times. This is useful when a value changes rapidly, but you only need the latest value. Adding debounceTime(0) to the pipe operator defers execution until the current event loop cycle ends, collapsing multiple calls into one. This approach can be used to handle scenarios where a function that changes a value is called multiple times, and you only want the tap operator to execute once. The article provides examples and explanations to illustrate these tips, which can be useful in real-world Angular projects.