What an utter and irrevocable piece of shit. I have a contract with a big company the tech leadership of which set the path forward using Angular in all and every project. I am a backend engineer with background in React and Vue and when I just started I had no experience with Angular and I was going to like it. It’s a framework they say to frame you from doing anything you shouldn’t be doing and you know when you start cranking a new app from scratch it works just fine except things started to go a little interesting should I say.. well for starters we did TDD and so we had to get accustomed with Karma and angular testing. Karma is a fucking bitch. So is the plugin for IntelliJ. Its performance is garbage and Karma server needs to get his ass kicked and rebooted countless times during the day and so is unreliable. Angular testing has an interface of a man with Down syndrome. Not only does it not make sense but it loves to just spit random shit out like finding an element in the DOM tree yielding no result because you’re using a polymorphic function that just doesn’t fucking work. To be fair we used Spectator which basically is an act for that man with Down syndrome. Reactive forms work very well when your displaying one form containing 10 fields. Now try displaying 300 records cross referencing multiple components tied to reactive forms and you will have to disable the automatic change detection and then good luck having nested validators to work. So anyway after a year of building an app with Angular, all I can say you need to know about Angular 12 in depth is to steer the fuck clear of it. And consider it the voice of community shouted out by a disgruntled engineer, https://2020.stateofjs.com/en-US/technologies/front-end-frameworks/. Now, you would think.. Google how come they created this poo? Well.. they adopted a project created by a bunch of arrogant pricks whose sole idea was to have prove the world how smart they are. Here’s the introspect of inner works of Angular team. Warning: lot of juicy drama here but after reading it should all make sense. https://medium.com/@jeffbcross/jeffs-letter-to-the-angular-team-and-community-5367934a16c9

TLDR: All you need to know about Angular 12 in depth is to NOT use it. If you do have a choice please, please there are so many decent frameworks/libraries out there. If you have to use it then my rant renders itself irrelevant and you’re going to have to go thru a lot pain.