关于前端:时间格式化函数

    function timeFormat(time) {        var date = time == undefined ? new Date() : new Date(time);        var seperator1 = "-";        var year = date.getFullYear();        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 = year + seperator1 + month + seperator1 + strDate;        // HH：mm：ss        var HH = date.getHours();        var mm = date.getMinutes();        var ss = date.getSeconds();        HH = (HH <= 9) ? ("0" + HH) : HH        mm = (mm <= 9) ? ("0" + mm) : mm        ss = (ss <= 9) ? ("0" + ss) : ss        var seperator2 = ":";        currentdate += ' ' + HH + seperator2 + mm + seperator2 + ss;        return currentdate;        //  return strDate;    }    //document.querySelector("#app").setAttribute("data-version", timeFormat());