📄Managing the Sticky Navigation: Angular, Tailwind, and RxJS

#angular #rxjs #tailwind #navbar #ui_element

Explanation:
— `public readonly isSticky$ = fromEvent(window, 'scroll').pipe(...):` This defines the isSticky$ observable using RxJS operators. It listens for scroll events on the window, maps them to the vertical scroll position (window.scrollY), filters out consecutive duplicate values, and then maps the scroll position to a boolean value indicating whether the scroll position is greater than 24 (assuming 24 is a threshold value for determining when the navigation bar should become sticky).

— `distinctUntilChanged()`: This operator filters out consecutive duplicate values emitted by the observable.

— `map((scrollTop: number) => scrollTop > 24)`: This operator maps the scroll position (scrollTop) to a boolean value, indicating whether the user has scrolled past a certain threshold (24 in this case).

— `(isSticky$ | async) === true`: This condition checks if the value emitted by the isSticky$ is true or not. Which makes it convenient since you don’t have to unsubscribe the observable.

— `sticky top-0 z-10 shadow-lg opacity-95 bg-white`: These classes from TailWind will help enhance the sticky experience when the users scroll down.

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