javascript - 如果数字小于 10，则添加前导零

Question

<10时，日、时、分、秒前需加'0'。
请帮忙!谢谢!!

            dateDiff: function(date1, date2){
                var diff = {}
                var tmp = date2 - date1;

                tmp = Math.floor(tmp/1000);
                diff.sec = tmp % 60;
                tmp = Math.floor((tmp-diff.sec)/60);
                diff.min = tmp % 60; 
                tmp = Math.floor((tmp-diff.min)/60);
                diff.hour = tmp % 24;
                tmp = Math.floor((tmp-diff.hour)/24);
                diff.day = tmp;

                return diff;
            },

Answer 1

试试这个功能

function addZero(number)
{
 if(number<10)
    return "0"+number;
 else
    return number;
}