获取当前时间并格式化

## 1
 let date= new Date();
 let y = date.getFullYear();
 let MM = date.getMonth() + 1;
 MM = MM < 10 ? ('0' + MM) : MM;
 let d = date.getDate();
 let h = date.getHours();
 h = h < 10 ? ('0' + h) : h;
 let m = date.getMinutes();
 m = m < 10 ? ('0' + m) : m;
 let s = date.getSeconds();
 s = s < 10 ? ('0' + s) : s;
 vm.value3 = y + '-' + MM + '-' + d + ' ' + h + ':' + m + ':' + s;
## 2
dateFormat(date) {
        console.log(date)
        let format = 'yyyy-MM-dd';
        if (date != 'Invalid Date') {
            var o = {
                "M+": date.getMonth() + 1, //month
                "d+": date.getDate(), //day
                "h+": date.getHours(), //hour
                "m+": date.getMinutes(), //minute
                "s+": date.getSeconds(), //second
                "q+": Math.floor((date.getMonth() + 3) / 3), //quarter
                "S": date.getMilliseconds() //millisecond
            }
            if (/(y+)/.test(format)) format = format.replace(RegExp.$1,
                (date.getFullYear() + "").substr(4 - RegExp.$1.length));
            for (var k in o)
                if (new RegExp("(" + k + ")").test(format))
                    format = format.replace(RegExp.$1,
                        RegExp.$1.length == 1 ? o[k] :
                        ("00" + o[k]).substr(("" + o[k]).length));
            return format;
        }
        return '';
    },