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Angular FAQ: Top Questions

27. What is the role of NgZone in Angular?

NgZone is a service in Angular that creates a zone to detect changes and trigger change detection automatically when asynchronous tasks complete.

  • Helps Angular know when to update views.
  • Can be used to run code outside or inside Angular's zone for performance optimization.

constructor(private zone: NgZone) {}

this.zone.run(() => {
  // UI update logic
});