Advanced AngularLesson 32Free preview

Angular Change Detection

This lesson is part of Angular · All levels

Summary

Change detection is an Angular mechanism that updates DOMs when data changes. Angulars historically used Zone.js to detect asynchronous activity, but zoneless approaches and signals became more efficient modern options. The OnPush strategy reduces the number of checks by relying on input and signal changes.

Key points

Change detection updates the display when the data changes
Automatically detects asynchronous events (Zone.js)
OnPush limits inspection to specific components
Signals allow for a more economical zoneless approach

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