Converting modules to Backdrop from Drupal 7 (official documentation) Porting a Module to Backdrop – Basics (YouTube video by Backdrop co-founder Nate Haug a.k.a. quicksketch)
Converting modules to Backdrop from Drupal 7 (official documentation) Porting a Module to Backdrop – Basics (YouTube video by Backdrop co-founder Nate Haug a.k.a. quicksketch)