Framework Briefing — Angular 17 Adds Built-in Control Flow

Executive briefing: Google released Angular 17 on 8 November 2023, introducing the most significant template and tooling changes since standalone components.

Feature highlights

• Built-in control flow. New @if, @for, and @switch syntax replaces structural directives with faster compiled output.
• Deferrable views. Template annotations enable fine-grained lazy loading without bespoke routing code.
• Vite and esbuild pipeline. The CLI defaults to a faster dev server and build stack, reducing rebuild times.
• Improved SSR. Enhanced hydration and partial rendering streamline Angular Universal deployments.

Adoption steps

• Upgrade shared libraries to Angular 17 to unblock consumers from adopting the new template syntax.
• Refactor templates incrementally to the control flow syntax while retaining directive fallbacks where necessary.
• Benchmark the Vite-based builder in CI/CD and document migration steps for custom webpack configurations.

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