获取实时时间

function getDataShow() {
        let date = new Date();
        let year = date.getFullYear();
        let month = todouble(date.getMonth() + 1);
        let dates = todouble(date.getDate());
        let day = date.getDay();
        let hour = todouble(date.getHours());
        let minute = todouble(date.getMinutes());
        let second = todouble(date.getSeconds());
        let arr = ["星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"];
        let str = year + "-" + month + "-" + dates + " " + hour + ":" + minute + ":" + second ;
        document.getElementById("timer").innerHTML = str;

      }

      function todouble(n) {
        return n < 10 ? "0" + n : "" + n;
      }
      var aaa = JSON.parse(window.localStorage.getItem("TOV"));
      var num = window.localStorage.getItem("POLICENUMBER");
      if (aaa.assist_police) {
        document.getElementById("assist_police").innerHTML = '辅警:' + aaa.assist_police;
      }
      if (aaa.web_police1_name || aaa.scene_police_name) {
        document.getElementById("police").innerHTML = '民警:' + aaa.web_police1_name + '  ' + aaa.scene_police_name +'  ' + aaa.web_police2_name;

      }