text: var checkboxElement = document.getElementById("anonymity-filter");
  var ulElement = document.getElementById("stupids");
  var stupidInfoElement = document.getElementById("stupid-list-info");
  var inputElement = document.getElementById("input-user")
  
  chrome.storage.sync.get(['stupids', 'anonymity-filter'], (items) => {
      // initialization
      checkboxElement.checked = items['anonymity-filter'];
      stupidInfoElement.innerHTML = "黑名单(" + items.stupids.length + ")";
  
      for (var i = 0; i < items.stupids.length; i++) {
          var li = document.createElement("li");
          li.innerHTML = items.stupids[i];
          li.addEventListener('click', (event) => {
              var target = event.target || event.srcElement;
              chrome.storage.sync.get(['stupids'], (item) => {
                  item.stupids.splice(item.stupids.indexOf(target.innerHTML), 1);
                  chrome.storage.sync.set({ 'stupids': item.stupids });
                  stupidInfoElement.innerHTML = "黑名单(" + item.stupids.length + ")";
              });
              target.parentNode.removeChild(target);
          });
          ulElement.appendChild(li);
      }
  
      // update
      checkboxElement.addEventListener("change", () => {
          var currentState = checkboxElement.checked; chrome.storage.sync.set({ 'anonymity-filter': currentState });
      }, false);
  });
  