Dependencies

You can use Composer to manage dependencies for your custom modules. To do this, your Drupal site's composer.json (located in the repo root) must have a way to read your custom project's composer.json file. If your custom project is not hosted on Packagist or Drupal.org, you may use a Composer path repository to accomplish this.

Find the repositories section of your root composer.json file, and modify it to include your custom module or modules as path repositories:

Composer can be used to manage Drupal and all its dependencies, including modules, themes, and libraries.