Merge branch 'release/0.2.1'

README.md

@@ -7,6 +7,10 @@ This `ember-cli` addon adds a simple, highly performant Ember Mixin to your app.
 
 This software will not be ready for production use until `1.0.0`. 
 
+## Demo
+- App: http://development.ember-in-viewport-demo.divshot.io/
+- Source: https://github.com/poteto/ember-in-viewport-demo
+
 ## Usage
 Usage is simple. First, add the mixin to your `Component`:
 
@@ -54,6 +58,12 @@ export default Ember.Component.extend(InViewportMixin, {
 });
 ```
 
+- `viewportUseRAF: boolean`
+
+  Default: Depends on browser
+
+  As it's name suggests, if this is `true`, the mixin will use `requestAnimationFrame` instead of the Ember run loop. Unless you want to force enabling or disabling this, you won't need to override this option.
+
 - `viewportSpy: boolean`
 
   Default: `false`

addon/utils/is-in-viewport.js

@@ -20,8 +20,8 @@ export default function isInViewport(boundingClientRect={}, height=0, width=0, t
   } = tolerances;
 
   return (
-    (top - topTolerance)       >= 0 &&
-    (left - leftTolerance)     >= 0 &&
+    (top + topTolerance)       >= 0 &&
+    (left + leftTolerance)     >= 0 &&
     (bottom - bottomTolerance) <= height &&
     (right - rightTolerance)   <= width
   );

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ember-in-viewport",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "description": "Detect if an Ember View or Component is in the viewport @ 60FPS",
   "directories": {
     "doc": "doc",