Angular's New Control Flow and Signals Syntax Explained Side by Side

Angular has introduced significant syntax changes in recent versions, replacing structural directives like *ngIf and *ngFor with cleaner block-based alternatives such as @if and @for. The new @for syntax makes the track property mandatory, preventing silent full-list re-renders that occurred when developers forgot trackBy in the older approach. Beyond template syntax, Angular now offers signals via signal() and computed(), which enable fine-grained change detection by updating only the specific DOM nodes that depend on a changed value, rather than walking the entire component tree. The new input() function similarly replaces the @Input() decorator, allowing derived values to recompute only when the input actually changes. Developers can migrate existing codebases automatically using Angular's built-in schematic command ng generate @angular/core:control-flow, and old and new syntaxes can coexist within the same application during a gradual transition.