Improved jsdocs

Author: photonstorm

src/core/Config.js

@@ -204,12 +204,12 @@ var Config = new Class({
         //  DOM Element Container
 
         /**
-         * @const {?boolean} Phaser.Core.Config#domCreateContainer - EXPERIMENTAL: Do not currently use.
+         * @const {?boolean} Phaser.Core.Config#domCreateContainer - Should the game create a div element to act as a DOM Container? Only enable if you're using DOM Element objects. You must provide a parent object if you use this feature.
          */
         this.domCreateContainer = GetValue(config, 'dom.createContainer', false);
 
         /**
-         * @const {?boolean} Phaser.Core.Config#domBehindCanvas - EXPERIMENTAL: Do not currently use.
+         * @const {?boolean} Phaser.Core.Config#domBehindCanvas - Should the DOM Container that is created (if `dom.createContainer` is true) be positioned behind (true) or over the top (false, the default) of the game canvas?
          */
         this.domBehindCanvas = GetValue(config, 'dom.behindCanvas', false);
 

src/core/typedefs/DOMContainerConfig.js

@@ -2,6 +2,6 @@
  * @typedef {object} Phaser.Core.Types.DOMContainerConfig
  * @since 3.12.0
  *
- * @property {boolean} [createContainer=false] - Create a div element in which DOM Elements will be contained. You must also provide a parent.
- * @property {boolean} [behindCanvas=false] - Place the DOM Container behind the Phaser Canvas. The default is to place it over the Canvas.
+ * @property {boolean} [createContainer=false] - Should the game create a div element to act as a DOM Container? Only enable if you're using DOM Element objects. You must provide a parent object if you use this feature.
+ * @property {boolean} [behindCanvas=false] - Should the DOM Container that is created (if `dom.createContainer` is true) be positioned behind (true) or over the top (false, the default) of the game canvas?
  */