title: 'Cache-Control&ETag in Angular2
body: <p>I have an app thats made on Angular2 and when I run a speed page test with pagespeed tool. I get an issue with leverage browser caching and it says to cache some of my resources as I'm making too many requests even though these resources are stored locally with the app.</p>
  
  <p>when i go into details of leverage browser caching.They recommended below:
  1-Cache-Control
  2-ETag</p>
  
  <p>Can anyone please help me to explain how can we implement Cache-Control&amp;ETag in Angular2.</p>