By claudiu.cristea on
Change record status: 
Published (View all published change records)
Project: 
Drupal core
Introduced in branch: 
8.7.x
Introduced in version: 
8.7.0-alpha1
Issue links: 
https://www.drupal.org/node/2497909
Description: 

The form element has a new property #label_for which can be used to associate the label of the form element with a different field. The value should be the desired field ID. This property can be used by form elements with composite fields to make the label refer one specific field.

For a use case, see \Drupal\file\Element\ManagedFile::processManagedFile().

Impacts: 
Module developers
Themers