feat(scroll): Native scrolling default. Closes #4725

Author: mlynch

Diff for: js/angular/directive/content.js

@@ -71,7 +71,7 @@ function($timeout, $controller, $ionicBind, $ionicConfig) {
         element.addClass('scroll-content-false');
       }
 
-      var nativeScrolling = attr.overflowScroll === "true" || !$ionicConfig.scrolling.jsScrolling();
+      var nativeScrolling = attr.overflowScroll !== "false" && (attr.overflowScroll === "true" || !$ionicConfig.scrolling.jsScrolling());
 
       // collection-repeat requires JS scrolling
       if (nativeScrolling) {

Diff for: js/angular/service/ionicConfig.js

@@ -91,9 +91,9 @@
 /**
  * @ngdoc method
  * @name $ionicConfigProvider#scrolling.jsScrolling
- * @description  Whether to use JS or Native scrolling. Defaults to JS scrolling. Setting this to
- * `false` has the same effect as setting each `ion-content` to have `overflow-scroll='true'`.
- * @param {boolean} value Defaults to `true`
+ * @description  Whether to use JS or Native scrolling. Defaults to native scrolling. Setting this to
+ * `true` has the same effect as setting each `ion-content` to have `overflow-scroll='false'`.
+ * @param {boolean} value Defaults to `false` as of Ionic 1.2
  * @returns {boolean}
  */
 
@@ -309,7 +309,7 @@ IonicModule
     },
 
     scrolling: {
-      jsScrolling: true
+      jsScrolling: false
     },
 
     spinner: {

Diff for: js/views/scrollViewNative.js

@@ -18,6 +18,16 @@
       self.__maxScrollTop = Math.max((self.__contentHeight) - self.__clientHeight, 0);
       self.__maxScrollLeft = Math.max((self.__contentWidth) - self.__clientWidth, 0);
 
+      if(options.startY >= 0 || options.startX >= 0) {
+        ionic.requestAnimationFrame(function() {
+          self.el.scrollTop = options.startY || 0;
+          self.el.scrollLeft = options.startX || 0;
+
+          self.__scrollTop = self.el.scrollTop;
+          self.__scrollLeft = self.el.scrollLeft;
+        })
+      }
+
       self.options = {
 
         freeze: false,
@@ -459,4 +469,3 @@
   });
 
 })(ionic);
-