js 毫秒/秒转化成时间格式

是在写过滤器的时候想起来记录一下

函数如下

formatSeconds (value) {
        var offset = parseInt(value);// 单位为秒
        var offset = parseInt(value/1000);// 单位为毫秒
        var secLeft = offset%60;
        var minLeft = Math.floor(offset/60)%60;
        var hourLeft = Math.floor(offset/60/60)%24;
        var dayLeft = Math.floor(offset/60/60/24);
        var min = minLeft
        var hour = hourLeft
        var day = dayLeft
        // 补0操作
        secLeft = (secLeft<10 ? '0' : '') + secLeft;
        minLeft = (minLeft<10 ? '0' : '') + minLeft;
        hourLeft = (hourLeft<10 ? '0' : '') + hourLeft;

        // ）拼接时间格式，返回值
        let result 
        if (min <= 0 && hour <= 0 && day <= 0) {
            result = '00'  + ':' + secLeft ;
        } else if (min > 0 && hour <= 0 && day <= 0) {
            result = minLeft + ':' + secLeft ;
        } else if (min > 0 && hour > 0 && day <= 0) {
            result = hourLeft + ':' + minLeft + ':' + secLeft ;
        } else {
            result = dayLeft + ':' + hourLeft + ':' + minLeft + ':' + secLeft;
        }
        return result;
    }

时间效果：