Hide "The Boston Calendar" Events and remember hidden

hide-boston-calendar-events.js

// simple bookmarklet to hide events and re-hide them when re-activated
javascript:(function($){
  var itemsStr = localStorage.getItem('hiddenItems') || '[]';
  var itemsArr = JSON.parse(itemsStr);
  var $a = $('li.event h3 a');
  $(document).off('click');
  $('.hider').remove();
  $(document).on('click','.hider',hiderClicked);
  
  itemsArr.forEach(hideItem);
  $a.filter(':visible').after('<input class="hider" type="checkbox"/>');
  
  function hideItem(itm){
    $a.filter(':contains("'+itm+'")').closest('li').hide();
  }
  
  function hiderClicked(evt){
    var str = $.trim($(evt.currentTarget).parent().text());
    if(itemsArr.indexOf(str)<0){
      itemsArr.push(str);
    }
    localStorage.setItem('hiddenItems',JSON.stringify(itemsArr));
    hideItem(str);
  }
})(jQuery);