ckeditor_entity_link_by_field

Provides a new CKEditor button which allows WYSIWYG content to be linked to Drupal entities using an autocomplete input which searches field values instead of labels/titles. The need for this functionality appears to go back to 2012 (see #1863944: Allow autocomplete searching on a field other than title).

The use-case this was developed for is linking of referenced articles from other articles/books by date/publication, which are more often used than titles when citing.

The module is based on CKEditor Entity Link and also uses portions from How to create a custom Autocomplete using the Drupal 8 Form API.

Currently, the module supports only nodes and a single bundle/content type, but was written to support more with a little additional work.