The Angular memory leak that kept sneaking into my code (and how to fix it)

Hey DEV community, In my day-to-day work reviewing Angular codebases, there is one specific memory leak that constantly sneaks into pull requests. It’s a silent performance killer that happens when we navigate between pages, and it usually slips right past standard testing. Instead of just writing another comment on a PR, I realized it's much easier to show the problem visually. So, I decided to step completely out of my comfort zone and record my first-ever YouTube coding tutorial. I quickly learned that centering a div is an absolute breeze compared to editing out my "umms" and trying to animate RxJS streams. Here is the "TL;DR" of what I cover, in case you prefer reading over watching: The "Unsubscribe from Everything" Myth A lot of developers are taught to aggressively unsubscribe from absolutely every observable. But Angular's HttpClient returns "Cold Observables". They emit a value, complete, and clean up after themselves automatically. No memory leak there. The real danger comes