@writ/utils/date-formatter-v2.js

My tool kit

'use strict';
// 或
function format(date, fmt) {
    var d = new Date(date);
    var o = {
        "M+": d.getMonth() + 1, //month
        "d+": d.getDate(), //days
        "h+": d.getHours(), //hour
        "m+": d.getMinutes(), //minute
        "s+": d.getSeconds(), //second
        "q+": Math.floor((d.getMonth() + 3) / 3), //quarter
        S: d.getMilliseconds() //millisecond
    };

    if (/(y+)/.test(fmt)) {
        fmt = fmt.replace(
            RegExp.$1,
            (d.getFullYear() + "").substr(4 - RegExp.$1.length)
        );
    }


    for (var k in o) {
        if (new RegExp("(" + k + ")").test(fmt)) {
            fmt = fmt.replace(
                RegExp.$1,
                RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length)
            );
        }
    }

    return fmt;
}

module.exports = format;