info.yml file holds the module information, compatibility, and dependencies information. It should not be any of the reserved terms: src, lib, vendor, assets, CSS, files, images, js, misc, templates, includes, fixtures, or Drupal.Your module should not have the same short name as any other module, theme, theme engine, or installation profile you will use on the site. It must not be longer than 50 characters.It must contain only lowercase letters, digits, and underscores.Some important rules to follow before you choose a name for your module: Step 1: Create a custom folder for your moduleĭrupal 9 file structure Step 2: Choose a short name or machine name for your module Here are some essential steps you need to follow to get started with creating a custom module in Drupal 9. Read on to find an easy step-by-step guide on custom module development and also applying CSS assets on your Drupal 9 website.ĭrupal 9 Custom Module Development in 5 easy steps Thanks to Drupal’s flexibility, you can now create powerful custom modules to add functionality and logic to meet your unique business requirements. That’s when custom module development comes into play.

For components that aren’t commonplace, a contributed or a core module does not always meet exact requirements. There are thousands of Drupal core and contributed modules to choose from, so why would anyone still want to build custom modules? The majority of the time it’s because website builders are looking for customized features to achieve specific functionalities or to stand out from the competition.

Drupal module development steps