在angular最新版本中使用Sass时遇到问题

Question

<script>
    function CalOt(){
        Before=document.getElementsByName("beforehr[]");
        After=document.getElementsByName("afterhr[]");
        TodayOt=document.getElementsByName("txtTodayOt[]");
        MonthTotal=0
        for(i=0;i<Before.length;i++){
            //alert(TimetoSec(Before[i].value));
            BeforeInSeconds=TimetoSec(Before[i].value); //Convert Before[i].value to Seconds
            AfterInSeconds=TimetoSec(After[i].value);//Convert After[i].value to Seconds
            Daytot=parseInt(BeforeInSeconds)+parseInt(AfterInSeconds);
            TodayOt[i].value=SecToTime(Daytot);
        MonthTotal=parseInt(MonthTotal)+parseFloat(Daytot);

}
MonthTotalHRS=SecToTime(MonthTotal);// Convert MonthTotal value to Time
document.getElementById("txtMonthTotal").value=MonthTotal;
document.getElementById("Mthtotal").innerHTML=MonthTotalHRS;
}
function TimetoSec(Time){
    TimeSplit=Time.split(":");
    HoursSeconds=TimeSplit[0]*60*60;
    Minutes=TimeSplit[1]*60;
    TotalSec=parseFloat(HoursSeconds)+parseFloat(Minutes)+parseFloat(TimeSplit[2]);
    console.log(TotalSec+"\n");
    return TotalSec;
}
function SecToTime(Seconds){
    Hr=Math.floor(Seconds/(60*60));
    Mn=Seconds % (60*60);
    Min=Math.floor(Mn/(60));
    Sec=Mn % (60);
    return Hr+":"+Min+":"+Sec;

}
</script>

我尝试过npm install node-sass但没有运气