Content moderation concurrent edit notify

About

Visually notify users if a new revision is saved when editing a moderated node.

Require core Drupal 8 module https://www.drupal.org/docs/8/core/modules/content-moderation

Minimum version Drupal 8.2.x

Implementation

At specific interval, an ajax request is made while editing a moderated node to check if the current revision is outdated. If so, a message is printed before the form and the save button so the editor can take any action before saving and overriding any change.

If the concurrent revision is saved in a published state, a Drupal constraint will bring an error when saving the form, this module just alert before saving for this.
If the concurrent revision is not moved in a published state, the current revision will replace any changes made on the concurrent one. This is where this module bring a message to alert the editor for this use case.