Answer
Change detection updates the view automatically when component data changes.
Angular uses Zone.js to track async events and re-render components when needed.
Quick Answer
Change Detection checks if component data has changed and updates the DOM accordingly. Angular runs change detection after every browser event, timer, or HTTP call (via Zone.js intercepting async operations). The default strategy checks every component. OnPush strategy only checks a component when its input references change or an event originates from it - much more efficient.
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ