Cancel <Link> on all non-left click or modified clicks.

Adapted from and fixes #61.

Author: STRML

lib/Link.js

@@ -26,10 +26,12 @@ var Link = React.createClass({
     if (this.props.onClick) {
       this.props.onClick(e);
     }
-    if (!e.defaultPrevented && 
-      // Don't break middle-click or (meta|ctrl)+click (new tab)
-      !(e.button == 1 || e.metaKey || e.ctrlKey)
-    ) {
+    
+    // return if the user did a middle-click, right-click, or used a modifier
+    // key (like ctrl-click, meta-click, shift-click, etc.)
+    if (e.button !== 0 || e.altKey || e.ctrlKey || e.metaKey || e.shiftKey) return;
+
+    if (!e.defaultPrevented) {
       e.preventDefault();
       this._navigate(this.props.href, function(err) {
         if (err) {