Work with a time span in Javascript

Question

Using Date.js already, but can also use another library if necessary.

Not sure what is the best way to work with time deltas. Specifically, I want to display the tim

Answer 1

/**
 * 计算时间对象与当前时间的差距，并显示友好的文本 
 * English: Calculating the difference between the given time and the current time and then showing the results.
 */
function date2Text(date) {
    var milliseconds = new Date() - date;
    var timespan = new TimeSpan(milliseconds);
    if (milliseconds < 0) {
        return timespan.toString() + "之后";
    }else{
        return timespan.toString() + "前";
    }
}

/**
 * 用于计算时间间隔的对象
 * English: Using a function to calculate the time interval
 * @param milliseconds 毫秒数
 */
var TimeSpan = function (milliseconds) {
    milliseconds = Math.abs(milliseconds);
    var days = Math.floor(milliseconds / (1000 * 60 * 60 * 24));
    milliseconds -= days * (1000 * 60 * 60 * 24);

    var hours = Math.floor(milliseconds / (1000 * 60 * 60));
    milliseconds -= hours * (1000 * 60 * 60);

    var mins = Math.floor(milliseconds / (1000 * 60));
    milliseconds -= mins * (1000 * 60);

    var seconds = Math.floor(milliseconds / (1000));
    milliseconds -= seconds * (1000);
    return {
        getDays: function () {
            return days;
        },
        getHours: function () {
            return hours;
        },
        getMinuts: function () {
            return mins;
        },
        getSeconds: function () {
            return seconds;
        },
        toString: function () {
            var str = "";
            if (days > 0 || str.length > 0) {
                str += days + "天";
            }
            if (hours > 0 || str.length > 0) {
                str += hours + "小时";
            }
            if (mins > 0 || str.length > 0) {
                str += mins + "分钟";
            }
            if (days == 0 && (seconds > 0 || str.length > 0)) {
                str += seconds + "秒";
            }
            return str;
        }
    }
}