Leverage browser caching for the following cacheable resources

Question

• https://www.example.com/qa-content/jquery-3.3.1.min.js (expiration not specified)
• https://www.example.com/qa-theme/SnowFlat/images/icons/close-black.png (expiration not specified)
• https://www.example.com/qa-theme/SnowFlat/images/icons/search-mobile.png (expiration not specified)
• https://www.example.com/qa-theme/SnowFlat/images/vote-buttons-2.png (expiration not specified)
• https://www.googletagmanager.com/gtag/js?id=UA-92155952-2 (15 minutes)
• https://www.googletagservices.com/activeview/js/current/osd.js?cb=%2Fr20100101 (50 minutes)
• https://www.googletagservices.com/activeview/js/current/osd_listener.js?cache=r20110914 (50 minutes)
• https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js (1 hour)
• https://www.google-analytics.com/analytics.js (2 hours)

Comments

Caching you must enable in the server settings. It has nothing to do with the Q2A code though after enabling cache you have to invalidate it if you happen to modify any cached code. Images, css and JS files must be cached.