new Date() 日期格式处理

参考： https://blog.csdn.net/qq_39759115/article/details/78893853

参考：https://segmentfault.com/q/1010000018325857?utm_source=tag-newest

    // 获取的年份和月份 对应的当月总天数
    mGetDate: function(year, month) {
        let d = new Date(year, month, 0);
        return parseInt(d.getDate());
    },
    // 获取当前时间并格式化“yyyy-MM-dd HH:MM:SS”
    getNowFormatDate: function() {
        var date = new Date();
        var seperator1 = "/";
        var seperator2 = ":";
        var month = date.getMonth() + 1;
        var strDate = date.getDate();
        if (month >= 1 && month <= 9) {
            month = "0" + month;
        }
        if (strDate >= 0 && strDate <= 9) {
            strDate = "0" + strDate;
        }
        var currentdate = date.getFullYear() + seperator1 + month + seperator1 + strDate +
            " " + date.getHours() + seperator2 + date.getMinutes() +
            seperator2 + date.getSeconds();
        return currentdate;
    },