feat(this.rb.elms): provide namespace for storing component elements via this.rb.elms property

Author: jyounce

README.md

@@ -24,6 +24,7 @@ $ npm install @rapid-build-ui/rb-base
 * Callbacks:
 	* viewReady()
 * Creates this.rb object that contains a set of common helper objects:
+	* this.rb.elms
 	* this.rb.events
 	* this.rb.view
 
@@ -40,8 +41,8 @@ export class RbPopover extends RbBase() {
 	// Lifecycle
 	viewReady() { // :void
 		super.viewReady && super.viewReady(); // line required
-		const trigger = this.shadowRoot.querySelector('.trigger');
-		this.rb.events.add(trigger, 'click touchstart', this.toggle);
+		this.rb.elms.trigger = this.shadowRoot.querySelector('.trigger');
+		this.rb.events.add(this.rb.elms.trigger, 'click touchstart', this.toggle);
 	}
 	// Event Handler
 	toggle(e) { // :void
@@ -118,6 +119,11 @@ to be used in view.
 
 ## API
 
+### this.rb.elms
+*See "How To Use"*  
+This is object/hashmap to store component elements.
+
+
 ### this.rb.events
 * Properties
 	* events :object (readonly, hashmap of active events)

src/client/scripts/rb-base.js

@@ -14,6 +14,7 @@ const RbBase = (Base = HTMLElement) => class extends withComponent(Base) {
 	constructor() { // :void
 		super();
 		this.rb = {
+			elms:   {},
 			events: EventService.call(this),
 			view:   ViewService.call(this)
 		}