We’re making a new site based on Drupal 8. This site needs to display addresses, and some quick research leads us to the Address module. However, after downloading and trying to enable Address, we get the following message: Address requires the commerceguys/addressing library.
In the old days a requirement like this would be satisfied by manually downloading and extracting the library into sites/all/libraries/addressing. Nowadays that's no longer possible, PHP libraries must be installed using Composer.Read on to find out what is Composer and how to use it