Deprecation: #60574 - Client Related Conditions 

See forge#60574

Description 

Conditions that depend on client details are unlovely for a number of reasons:

  • Per condition or permutation of conditions that matches, the frontend creates a different cache entry. This can lead to a very high number of cache entries per page
  • Conditions based on browser or clients on server side are bad practice.
  • The device information in the core is outdated (for example it is possible to match "AMIGA")
  • Setups like reverse proxies give additional headaches with these types of conditions
  • All client related condition types are deprecated with this patch.

Impact 

Usage of client related TypoScript conditions will result in a deprecation log message. Client related conditions are browser, version, system and useragent.

Affected installations 

Installations using TypoScript conditions for browser, version, system or useragent.

Migration 

  • Most usual conditions for specific browsers can nowadays be turned into conditional CSS includes
  • Use libraries such as modernizr for browser support
  • If conditions for specific clients or devices are still needed, they should be done with a userFunc condition and a project like WURFL that keep the device information more recent than the current core code like matching AMIGA