Preparing for scrollToTop

Author: compulim

packages/component/src/BasicScrollToBottom.js

@@ -11,7 +11,7 @@ const ROOT_CSS = css({
 });
 
 export default props =>
-  <Composer>
+  <Composer mode={ props.mode === 'top' ? 'top' : 'bottom'}>
     <div className={ classNames(ROOT_CSS + '', props.className) }>
       <Panel>
         { props.children }

packages/playground/src/App.js

@@ -52,6 +52,10 @@ class App extends Component {
     };
   }
 
+  componentDidMount() {
+    this.handleAdd(10);
+  }
+
   handleAdd(count) {
     this.setState(state => ({
       paragraphs: [