脚本集成未定义

Question

我有这个脚本： https://github.com/Fugiman/Twitch-Channel-Status 我想将它整合到我的wordpress网站中。 但这不起作用。当我用控制台调试它说：

  

未捕获的TypeError：undefined不是函数

它强调了这一点：

 document.refreshTwitchChannelStatuses = function () {
    var channels = {};
    // Create a mapping of channel name -> images to update based on that channel's status
    $("img[" + attribute + "]").each(function () {
      var $this = $(this),
          channel = $this.attr(attribute).toLowerCase();

      channels[channel] = channels[channel] || [];
      channels[channel].push($this);

      // If there's no image set already, default to offline
      if (!$this.attr("src")) {
        $this.attr("src", $this.attr("data-offline-image") || offlineImage);
      }
    });