entity_reference_tree

This module provides an entity relationship hierarchy tree widget for an entity reference field.

Drupal entity reference field, such as taxonomy term reference or content reference might have very complex
hierarchy. The autocomplete widget or drop down select box widget implemented by Drupal core doesn't present the relationship between those entities. This module provide a combination of an autocomplete textfield and a tree view for reference field as one widget. This module uses JsTree JavaScript library to render a hierarchy tree of those entities.

Requirements

- Drupal 8.5 or greater
- PHP 7.0 or greater
- JsTree 3.3.14 or greater (Included in this module)

Installation
- Install this module using the normal Drupal module installation process.
- The JsTree JavaScrip library has already been included in this module, you don't need to install it separately.

Settings

- This field widget only works with reference field, such as taxonomy term or contents. The settings are
located in the fields form display page (/admin/structure/types/manage/[Content Type]/form-display)

- Select the 'Entity reference tree widget' for the reference field that this widget should apply to.

Permissions:

• Taxonomy terms tree: Access the taxonomy vocabulary overview page
• Entity tree (other than taxonomy): View the entity

Related module:
Hierarchy Manager