more react changes, incomplete

src/app/components/Link.jsx

@@ -0,0 +1,31 @@
+import React from 'react';
+import Router from '../Router';
+import shallowEqual from '../utils/shallowEqual';
+
+export default class Link extends React.Component {
+
+  shouldComponentUpdate(nextProps) {
+    return !shallowEqual(this.props, nextProps);
+  }
+
+  handler = (event) => {
+    if (event.getModifierState
+      && ( event.getModifierState('Shift')
+      || event.getModifierState('Alt')
+      || event.getModifierState('Control')
+      || event.getModifierState('Meta')
+      || event.button > 1)) {
+      return;
+    }
+    event.nativeEvent && event.preventDefault && event.preventDefault();
+
+    if (this.props.href) {
+      Router.go(encodeURI(this.props.href));
+    }
+  }
+
+  render() {
+    return <a {...this.props} onClick={this.handler}>{this.props.children}</a>
+  }
+
+}