You want to optimize a large Angular app by changing some components to OnPush strategy. What is a key difference you must handle compared to the default strategy?

hard🧠 Conceptual Q8 of 15

Angular - Change Detection

AOnPush requires manual calls to detectChanges() always

BOnPush runs change detection on every event like the default strategy

COnPush disables change detection completely

DOnPush only runs change detection when input references change or events occur inside the component

Step-by-Step Solution

Solution:

Step 1: Understand OnPush behavior
OnPush strategy runs change detection only when input property references change or events happen inside the component.
Step 2: Compare with default strategy
Default runs on every event globally, OnPush is more selective, improving performance but requiring careful input management.
Final Answer:
OnPush only runs change detection when input references change or events occur inside the component -> Option D
Quick Check:
OnPush triggers on input ref changes or internal events [OK]

Quick Trick: OnPush triggers only on input ref changes or internal events [OK]

Common Mistakes:

MISTAKES

Thinking OnPush runs on every event
Assuming OnPush disables detection
Believing manual detectChanges() always needed

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More Angular Quizzes

You want to optimize a large Angular app by changing some components to OnPush strategy. What is a key difference you must handle compared to the default strategy?

Step 1: Understand OnPush behavior

Step 2: Compare with default strategy

Final Answer:

Quick Check:

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