Short notes and TIL — quick thoughts on frontend, Angular, and the tools in between.https://pieper.ioen-ushttps://pieper.io/notes/#2026-06-13-boundary-error-boundarieshttps://pieper.io/notes/#2026-06-13-boundary-error-boundariesAngular v22 ships — a templatelevel error boundary that catches render failures in a subtree and shows a fallback instead of crashing the whole view. Works like React's error boundaries but lives in t…Sat, 13 Jun 2026 00:00:00 GMTangularerror-handlinghttps://pieper.io/notes/#2026-06-12-linked-signalhttps://pieper.io/notes/#2026-06-12-linked-signalcreates a writable signal that resets whenever its source changes — useful for local state that derives from an input. The alternative — — works but makes the dependency implicit and runs a tick later…Fri, 12 Jun 2026 00:00:00 GMTangularsignalshttps://pieper.io/notes/#2026-06-11-arrow-functions-in-templateshttps://pieper.io/notes/#2026-06-11-arrow-functions-in-templatesAngular v22 allows arrow functions directly in templates — no more extracting singleuse handlers into the component class. Keep them short. If the logic grows, move it to the class — the template shou…Thu, 11 Jun 2026 00:00:00 GMTangulartemplateshttps://pieper.io/notes/#2026-06-10-http-resourcehttps://pieper.io/notes/#2026-06-10-http-resourcereplaces the service + Subject pattern for simple HTTP calls. Loading state, errors, and the response are all signals — no RxJS pipe needed. For mutations, stick with directly. is readonly by design.Wed, 10 Jun 2026 00:00:00 GMTangularsignalshttphttps://pieper.io/notes/#2026-06-09-at-let-template-variableshttps://pieper.io/notes/#2026-06-09-at-let-template-variablesAngular's declares a local variable directly in the template — no extra component property or alias on a pipe needed. Useful whenever a signal or async result is referenced more than once in a templat…Tue, 09 Jun 2026 00:00:00 GMTangulartemplates