docs: function init() {
      var stateFromHash = getStateFromHash();
      var stateChanged = false;
  
      if (typeof defaults === 'object' && defaults) {
        Object.keys(defaults).forEach(function(key) {
          if (key in stateFromHash) return;
  
          stateFromHash[key] = defaults[key]
          stateChanged = true;
        });
      }
  
      if (stateChanged) set(stateFromHash);
    }