Component types

Each component type has a different directory structure and different contents for composer.json.

The following table discusses the component types that Magento Marketplace supports. The composer type column in the following table specifies the value of the type field you must add to composer.json for that type of component.

Friendly name composer.json type Description
Metapackage metapackage Technically, a Composer package type, not a Magento component type. A metapackage consists of only a composer.json file that specifies a list of components and their dependencies. For example, both Magento Open Source and Magento Commerce are metapackages.
Module magento2-module Code that modifies Magento application behavior. You can upload a single module to the Magento Marketplace or your module can be dependent on some parent package.
Theme magento2-theme Code that modifies the look and feel of the storefront or Magento Admin.
Language package magento2-language Translations for the storefront or Admin.
Library magento2-library Support for libraries located in lib/internal instead of in the vendor directory.
Component magento2-component The package formed of the files that must be located in root (index.php, .htaccess, etc). This includes dev/tests and setup as well for now.

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About component file structure