By webchick on
Change record status: 
Published (View all published change records)
Project: 
Drupal core
Introduced in branch: 
8.5.x
Introduced in version: 
8.5.0-alpha1
Issue links: 
https://www.drupal.org/node/2915784
https://www.drupal.org/node/2927228
https://www.drupal.org/node/2927230
Description: 

As of Drupal 8.5, Drupal core's ESLint syntax checking enforces more rules, for more cohesive JavaScript. For a "preview" of what's to come, see the JavaScript clean-up issue tag.

camelcase
Variables should now use camelCase naming conventions, as opposed to underscore_separated naming conventions; for example: 
-        const element_settings = {};
+        const elementSettings = {};
Impacts: 
Module developers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done