Date

获取从当前时间到指定日期的间隔时间

function getChIntv ( putStr) {
    var targetTime = new Date(putStr);
    var currentTime = new Date();
    var interval = currentTime - targetTime
    var totalSecond = Math.floor(interval/1000)
    var second = totalSecond%60
    var totalminute = Math.floor(totalSecond/60)
    var minute = totalminute % 60
    var totalhour = Math.floor(totalminute/60)
    var hours = totalhour % 24
    var day = Math.floor(totalhour / 24)
    return day + "days" + hours + "hours" + minute + "minutes" + second + "seconds";
}
var result = getChIntv("2017,08,01")  //"25days15hours5minutes34seconds"

把hh-mm-dd格式数字日期改成中文日期

function getChsDate (putstr) {
    var dict = ["零","一","二","三","四","五","六","七","八","九","十","十一","十二","十三","十四","十五","十六","十七",
        "十八","十九","二十","二十一","二十二","二十三","二十四","二十五","二十六","二十七","二十八","二十九","三十",
        "三十一"]
    var arr = putstr.split('-')
    var arrYear = arr[0].split('')
    var strYear = ""
    for (var i=0; i<4; i++) {
        strYear += dict[parseInt(arrYear[i])]
    }
    var strMonth = dict[parseInt(arr[1])]
    var strDate = dict[parseInt(arr[2])]
    return strYear + '年' + strMonth + '月' + strDate + '日'
}
var result = getChsDate("2017-08-01")

写一个函数，参数为时间对象毫秒数的字符串格式，返回值为字符串。假设参数为时间对象毫秒数t，根据t的时间分别返回如下字符串:

刚刚（ t 距当前时间不到1分钟时间间隔）
3分钟前 (t距当前时间大于等于1分钟，小于1小时)
8小时前 (t 距离当前时间大于等于1小时，小于24小时)
3天前 (t 距离当前时间大于等于24小时，小于30天)
2个月前 (t 距离当前时间大于等于30天小于12个月)
8年前 (t 距离当前时间大于等于12个月)

function friendlyDate(time) {
    var targetTime = new Date(time)
    var currentTime = Date.now()
    var offset = currentTime - targetTime
    var minute = Math.floor(offset/1000/60)
    if (offset < 1) {
        return "刚刚"
    } else if(minute < 60){
        return "三分钟前"
    } else if(minute < 1440){
        return "八小时前"
    } else if (minute < 43200){
        return "三天前"
    } else if (minute < 518400){
       return "两个月前"
    } else{
        return "八年前"
    }
}
var str = friendlyDate('1484286699422')