Angular from Zero - The Full-Framework Deal

What Angular actually is - a complete, TypeScript-first application framework - explained through its modern core: standalone components, signals, dependency injection, and just enough RxJS.

1. What Angular Actually Is Angular is a complete application framework - components, routing, HTTP, forms, and DI ship together, TypeScript is mandatory, and the CLI generates the architecture - which is exactly its trade against the pick-your-own stacks.
2. Components and Templates Angular templates bind with [property] in and (event) out, branch with @if, and loop with @for plus a mandatory track expression - the modern control flow that replaced *ngIf and *ngFor.
3. Signals signal() creates state read by calling it and written with set/update, computed() derives cached values - and reading through the call syntax is how Angular knows exactly what changed.
4. Component Inputs and Outputs input() receives data as a signal, output() emits events up, model() composes them for two-way binding - the modern signal-based component interface, with @Input/@Output as the legacy dialect.
5. Services and Dependency Injection A service is a class holding shared state or logic; inject() delivers the single shared instance to whoever asks - Angular's DI is the framework's answer to both sharing and testability.
6. HTTP and Just Enough RxJS HttpClient returns observables - lazy streams you either unwrap with the async pipe, convert with toSignal, or subscribe to by hand - and the survival subset of RxJS is smaller than its reputation.
7. When Angular Breaks Angular's NG-numbered errors decoded: unknown elements from missing imports, injection context violations, signal-write guards, dialect mismatches, and the subscription leak - each with its calm fix.
8. Where to Go Next The Router and reactive forms are the two in-box systems worth learning next; RxJS depth, NgRx, and SSR wait for their pains - and Angular Material is the default UI answer most teams take.