Date

[yym-yumeng123]

1、 写一个函数getChIntv，获取从当前时间到指定日期的间隔时间

var str = getChIntv("2017-02-08");
console.log(str);  // 距除夕还有 20 天 15 小时 20 分 10 秒

function getChIntv(date){
  var now = Date.now()
  var specifiedDate = Date.parse(date)
  var differ = Math.abs(now - specifiedDate)
  var totalSeconds = Math.floor(differ / 1000);
      //获取秒
      seconds = totalSeconds%60,
      totalMinutes = Math.floor(totalSeconds / 60),
     //获取分钟
      minutes = totalMinutes % 60,
      totalHours = Math.floor(totalMinutes / 60),
      hours = totalHours % 24,
      totalDays =  Math.floor(totalHours / 24),
      days = totalDays % 365,
      totalYears = Math.floor(totalDays / 365);
   var differTime = totalYears + '年' + days + '天' + hours + '小时' + minutes + '分钟' + seconds + '秒';
    return differTime;
}
var str = getChIntv("2017-03-08 10:30:24");
console.log(str);  //"0年179天11小时23分钟59秒"

2、把hh-mm-dd格式数字日期改成中文日期

var str = getChsDate('2015-01-08');
console.log(str);  // 二零一五年一月八日

function getChsDate(str) {
    var dist = ["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 = str.split('-');
    var year = arr[0];
    var month = arr[1];
    var day = arr[2];

    var Chyear = dist[parseInt(year[0])] + dist[parseInt(year[1])] + dist[parseInt(year[2])] +dist[parseInt(year[3])] + '年';
var Chmonth = dist[parseInt(month)] + '月';
var Chday = dist[parseInt(day)] + '日';
return Chyear + Chmonth + Chday ;
}
var str = getChsDate('2015-01-08');
console.log(str);  // 二零一五年一月八日

8、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 str = friendlyDate( '1484286699422' ) //  1分钟前
  var str2 = friendlyDate('1483941245793') //4天前

  
  function friendlyDate(time){
  var t = Date.now()
  //  1s = 1000ms
  var moment = t - 60*1000
  var threeM = t - 3*60*1000
  var eightH = t - 8*60*60*1000
  var threeD = t - 24*60*60*1000
  var twoM = t - 30*24*60*60*1000
  var eightY = t - 12*30*24*60*60*1000
  if(time > moment){
  document.write("刚刚")
  }else if(time > threeM){
  document.write("3分钟前")
  }else if ( time > eightH ) {
  document.write("8小时前")
  }else if ( time > threeD) {
  document.write("3天前")
  }else if (time > twoM) {
  document.write("2个月前")
  }else {
  document.write("8年前")
  }
  }
  friendlyDate( '1504445176260' ) //  1分钟前
  friendlyDate('1583941245793') //4天前

[yym-yumeng123]

第八题写错了.更正如下

function getFriendlyDate(timeStr){
  var interval = Date.now() - parseInt(timeStr)
  var ch = interval > 0 ? '前': '后'
  var str
  interval = Math.abs(interval)
  switch (true){
    case interval < 60*1000:
      str = '刚刚'
      break
    case interval < 60*60*1000:
      str = Math.floor(interval/(60*1000)) + '分钟' + ch
      break
    case interval < 24*60*60*1000:
      str = Math.floor(interval/(60*60*1000)) + '小时' + ch
      break
    case interval < 30*24*60*60*1000:
      str = Math.floor(interval/(24*60*60*1000)) + '天' + ch
      break
    case interval < 12*30*24*60*60*1000:
      str = Math.floor(interval/(30*24*60*60*1000)) + '个月' + ch
      break    
    default:  
      str = Math.floor(interval/(12*30*24*60*60*1000)) + '年' + ch
  }
  return str
}
console.log( getFriendlyDate('1505122360640') )  //"7分钟前"
console.log( getFriendlyDate('1503122360640') )  //"23天前"
console.log( getFriendlyDate('1203122360640') )  //"9年前"
console.log( getFriendlyDate('1508122360640') )  //"1个月后"