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What does Zone.js primarily help Angular to do automatically?

easy🧠 Conceptual Q1 of 15
Angular - Change Detection
What does Zone.js primarily help Angular to do automatically?
ADetect when asynchronous tasks finish and update the UI
BCompile TypeScript code into JavaScript
CManage routing between pages
DHandle HTTP requests manually
Step-by-Step Solution
Solution:

  1. Step 1: Understand Zone.js role in Angular

    Zone.js tracks asynchronous operations like timers and HTTP calls.

  2. Step 2: Connect Zone.js to UI updates

    When async tasks complete, Zone.js triggers Angular to update the UI automatically.

  3. Final Answer:

    Detect when asynchronous tasks finish and update the UI -> Option A

  4. Quick Check:

    Zone.js role = Detect async completion and update UI [OK]
Quick Trick: Zone.js tracks async tasks to auto-update UI [OK]
Common Mistakes:
MISTAKES
  • Confusing Zone.js with routing or compilation
  • Thinking Zone.js handles HTTP manually
  • Assuming Zone.js only works with timers

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