Component library missing when rendered via Drupal.theme (via JS not via Twig)

Problem/Motivation

Component library is missing when it is not rendered via Twig.

If rendered with Drupal JavaScript API - such as a custom Drupal.theme.myComponent for instance - the component's library is not loaded.

Steps to reproduce

• Create a single-directory component in a module
• Render the component programmatically
• Attach the output in drupalSettings
• Create a custom Drupal.theme.myComponent function and consume the output
• Call the Drupal.theme
• Result: the component Twig is rendered but the library is missing (i.e. no CSS no JS)

Proposed resolution

TBD

Remaining tasks

TBD