js 显示时间戳转化为几分钟之前多久之前方法函数

function getDateDiff(data) {
    //var str = data;
    //将字符串转换成时间格式
    var timePublish = new Date(data);
    var timeNow = new Date();
    var minute = 1000 * 60;
    var hour = minute * 60;
    var day = hour * 24;
    var month = day * 30;
    var diffValue = timeNow - timePublish;
    var diffMonth = diffValue / month;
    var diffWeek = diffValue / (7 * day);
    var diffDay = diffValue / day;
    var diffHour = diffValue / hour;
    var diffMinute = diffValue / minute;

    if (diffValue < 0) {
        alert("错误时间");
    }
    else if (diffMonth > 3) {
        result = timePublish.getFullYear() + "-";
        result += timePublish.getMonth() + "-";
        result += timePublish.getDate();
        alert(result);
    }
    else if (diffMonth > 1) {
        result = parseInt(diffMonth) + "月前";
    }
    else if (diffWeek > 1) {
        result = parseInt(diffWeek) + "周前";
    }
    else if (diffDay > 1) {
        result = parseInt(diffDay) + "天前";
    }
    else if (diffHour > 1) {
        result = parseInt(diffHour) + "小时前";
    }
    else if (diffMinute > 1) {
        result = parseInt(diffMinute) + "分钟前";
    }
    else {
        result = "刚收藏";
    }
    return result;
}