如何将HTML5桌面通知的关闭时间更改为不自动关闭？

Question

我正在使用HTML5桌面通知.它运作良好,并根据我的要求给我适当的输出.现在,我想显示该通知,直到用户手动关闭该通知,我的代码可能如下所示.

function notifyMe() {
      if (!("Notification" in window)) {
        alert("This browser does not support desktop notification");
      }
      else if (Notification.permission === "granted") {
            var options = {
                    body: "due to your inactive response timer is stoped automatically. Start your timer again.",
                    dir : "ltr"
                 };
              var notification = new Notification("Your timer is stop",options);

      }
      else if (Notification.permission !== 'denied') {
        Notification.requestPermission(function (permission) {
          if (!('permission' in Notification)) {
            Notification.permission = permission;
          }

          if (permission === "granted") {
            var options = {
                  body: "due to your inactive response timer is stoped automatically. Start your timer again.",
                  dir : "ltr"
              };
            var notification = new Notification("Your timer is stop",options);
          }
        });
      }
    }