vue过滤时间(x分钟前,x周)

methods方法
 showtime(time) {
			      let date =
			        typeof time === "number"
			          ? new Date(time)
			          : new Date((time || "").replace(/-/g, "/"));
			      let diff = (new Date().getTime() - date.getTime()) / 1000;
			      let dayDiff = Math.floor(diff / 86400);
			
			      let isValidDate =
			        Object.prototype.toString.call(date) === "[object Date]" &&
			        !isNaN(date.getTime());
			
			      if (!isValidDate) {
			        window.console.error("不是有效日期格式");
			      }
			      const formatDate = function(date) {
			        let today = new Date(date);
			        let year = today.getFullYear();
			        let month = ("0" + (today.getMonth() + 1)).slice(-2);
			        let day = ("0" + today.getDate()).slice(-2);
			        let hour = today.getHours();
			        let minute = today.getMinutes();
			        let second = today.getSeconds();
			        // return `${year}-${month}-${day} ${hour}:${minute}:${second}`;
			        return `${month}-${day}`;
			      };
			         //小于0或者大于等于31显示原时间
			      if (isNaN(dayDiff) || dayDiff < 0 || dayDiff >= 31) {
			        return formatDate(date);
			      }
			      return (
			        (dayDiff === 0 &&
			          ((diff < 60 && "刚刚") ||
			            (diff < 120 && "1分钟前") ||
			            (diff < 3600 && Math.floor(diff / 60) + "分钟前") ||
			            (diff < 7200 && "1小时前") ||
			            (diff < 86400 && Math.floor(diff / 3600) + "小时前"))) ||
			        (dayDiff === 1 && "昨天") ||
			        (dayDiff < 7 && dayDiff + "天前") ||
			        (dayDiff < 31 && Math.ceil(dayDiff / 7) + "周前")
			      );
			    },