Prevent default action on link going to nowhere

app/assets/javascripts/path_locks.js

@@ -4,8 +4,9 @@
     function PathLocks() {}
 
     PathLocks.init = function(url, path) {
-      return $('a.path-lock').on('click', function() {
+      return $('a.path-lock').on('click', function(e) {
         var $lockBtn, currentState, toggleAction;
+        e.preventDefault();
         $lockBtn = $(this);
         currentState = $lockBtn.data('state');
         toggleAction = currentState === 'lock' ? 'unlock' : 'lock';