Zone Pollution
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What is Zone Pollution?
Zone.js is a signaling mechanism that Angular uses to detect when an application state might have changed. In some cases, scheduled tasks or microtasks don’t make any changes in the data model, which makes running change detection unnecessary. Common examples are requestAnimationFrame, setTimeout and setInterval. You can identify change detection with Angular DevTools, and you can run code outside the Angular zone to avoid unnecessary change detection calls.
Free resources to learn Zone Pollution
- Official docsZone Pollution
- Official docsAngular DevTools
- VideoNgZone in Angular - Improve Performance by Running Code Outside Angular
- Video4 Runtime Performance Optimizations
More in stage 24: Internationalization
Zone Pollution: common questions
Can I learn Zone Pollution in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Zone Pollution in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Zone Pollution tutorial for beginners?
It is lesson 141 of 158 in the free Angular roadmap, in stage 24, Internationalization. If you are new to Angular, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.