Follow-up · depth 3
What are common failure modes of Built-in Control Flow @if @for @switch?
What are common failure modes of Built-in Control Flow @if @for @switch?
Answers use simple, clear English.
Quick interview answer
Common failures around Built-in Control Flow @if @for @switch: blocking the hot path, ignoring backpressure, and weak timeout/retry design. Using index as track for reorderable lists.
Detailed answer
Failure modes for Built-in Control Flow @if @for @switch: Known pitfalls: Using index as track for reorderable lists. • Missing timeouts / unbounded retries • No backpressure when downstream slows • Assuming ordering/guarantees the runtime does not provide How seniors prevent them: Always track by identity; prefer new syntax in Angular 17+. Parent context: At Senior depth: start with the problem, then mechanism, then a short example. New template syntax replaces *ngIf/*ngFor for many cases: @if, @for (with track), @switch.
Full explanation
Name concrete failure modes and the mitigation for each — that scores higher than a vague “it can fail.” New template syntax replaces *ngIf/*ngFor for many cases: @if, @for (with track), @switch. Better type narrowing and performance guidance via mandatory track.
Follow-up questions
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Parent context — Built-in Control Flow @if @for @switch
At Senior depth: start with the problem, then mechanism, then a short example. New template syntax replaces *ngIf/*ngFor for many cases: @if, @for (with track), @switch.
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