docs(pullToRefresh): update docs

ionic/components/scroll/pull-to-refresh.ts

@@ -81,54 +81,154 @@ import {raf, ready, CSS} from '../../util/dom';
   directives: [NgIf, NgClass, Icon]
 })
 export class Refresher {
-  private ele: HTMLElement;
+  private _ele: HTMLElement;
   private _touchMoveListener;
   private _touchEndListener;
   private _handleScrollListener;
 
+
+  /**
+   * @private
+   */
   isActive: boolean;
+
+  /**
+   * @private
+   */
   isDragging: boolean = false;
+
+  /**
+   * @private
+   */
   isOverscrolling: boolean = false;
+
+  /**
+   * @private
+   */
   dragOffset: number = 0;
+
+  /**
+   * @private
+   */
   lastOverscroll: number = 0;
+
+  /**
+   * @private
+   */
   ptrThreshold: number = 0;
+
+  /**
+   * @private
+   */
   activated: boolean = false;
+
+  /**
+   * @private
+   */
   scrollTime: number = 500;
+
+  /**
+   * @private
+   */
   canOverscroll: boolean = true;
+
+  /**
+   * @private
+   */
   startY;
+
+  /**
+   * @private
+   */
   deltaY;
+
+  /**
+   * @private
+   */
   scrollHost;
+
+  /**
+   * @private
+   */
   scrollChild;
+
+  /**
+   * @private
+   */
   showIcon: boolean;
+
+  /**
+   * @private
+   */
   showSpinner: boolean;
+
+  /**
+   * @private
+   */
   isRefreshing: boolean;
+
+  /**
+   * @private
+   */
   isRefreshingTail: boolean;
 
+
+  /**
+   * @private
+   */
   @Input() pullingIcon: string;
+
+  /**
+   * @private
+   */
   @Input() pullingText: string;
+
+  /**
+   * @private
+   */
   @Input() refreshingIcon: string;
+
+  /**
+   * @private
+   */
   @Input() refreshingText: string;
+
+  /**
+   * @private
+   */
   @Input() spinner: string;
 
+
+  /**
+   * @private
+   */
   @Output() pulling: EventEmitter<any> = new EventEmitter();
+
+  /**
+   * @private
+   */
   @Output() refresh: EventEmitter<any> = new EventEmitter();
+
+  /**
+   * @private
+   */
   @Output() starting: EventEmitter<any> = new EventEmitter();
 
 
   constructor(
-    @Host() private content: Content,
+    @Host() private _content: Content,
-    element: ElementRef
+    _element: ElementRef
   ) {
-    this.ele = element.nativeElement;
+    this._ele = _element.nativeElement;
-    this.ele.classList.add('content');
+    this._ele.classList.add('content');
   }
 
   /**
    * @private
    */
   ngOnInit() {
-    let sp = this.content.getNativeElement();
+    let sp = this._content.getNativeElement();
-    let sc = this.content.scrollElement;
+    let sc = this._content.scrollElement;
 
     this.startY = null;
     this.deltaY = null;
@@ -156,7 +256,7 @@ export class Refresher {
    * @private
    */
   ngOnDestroy() {
-    let sc = this.content.scrollElement;
+    let sc = this._content.scrollElement;
     sc.removeEventListener('touchmove', this._touchMoveListener);
     sc.removeEventListener('touchend', this._touchEndListener);
     sc.removeEventListener('scroll', this._handleScrollListener);
@@ -245,7 +345,7 @@ export class Refresher {
    */
   show() {
     // showCallback
-    this.ele.classList.remove('invisible');
+    this._ele.classList.remove('invisible');
   }
 
   /**
@@ -253,7 +353,7 @@ export class Refresher {
    */
   hide() {
     // showCallback
-    this.ele.classList.add('invisible');
+    this._ele.classList.add('invisible');
   }
 
   /**
@@ -261,7 +361,7 @@ export class Refresher {
    */
   tail() {
     // tailCallback
-    this.ele.classList.add('refreshing-tail');
+    this._ele.classList.add('refreshing-tail');
   }
 
   /**