获取时间

  gerDate() {
   function addNum (str) {
     if(parseInt(str) > 9) {
       return str
     } else {
       return '0'+str;
     }
   };
    let newDate = new Date();
    let Y = newDate.getFullYear();
    let M = newDate.getMonth()+1;
    let D = newDate.getDate();
    let H = newDate.getHours()+8;         //获取的是格林尼治时间 +8 为北京时间
    let m = newDate.getMinutes();
    let S = newDate.getSeconds();
    return `${Y}-${addNum(M)}-${addNum(D)} ${addNum(H)}:${addNum(m)}:${addNum(S)}`;
  }

2: 格式: 2017-01-02 12:20:20.151

new Date(时间).toISOString().replace('T', ' ').replace('Z', '');

1其他格式 谷歌浏览器

new Date().toDateString()       -> "Mon May 22 2017"
new Date().toTimeString()      ->  "17:56:32 GMT+0800 (中国标准时间)"
new Date().toLocaleDateString()  -> "2017-5-22"
new Date().toLocaleTimeString()  ->"17:58:13"
new Date().toUTCString()        -> "Mon, 22 May 2017 09:59:03 GMT"
new Date().getMilliseconds()  -> '获取毫秒数', '386'
new Date().toLocaleString()  -> "2017-5-31 17:38:00"
`${new Date().toLocaleString()}:${new Date().getMilliseconds()}` ->  "2017-5-31 17:40:48:361"

比较日期

直接比较

var now1 = new Date();
var now2 = new Date();

now1 > now2
//false
now1 < now2
//true