请问下这段C# 用js怎么实现

请教下这段C# 用js如何实现

    public class Wave

    {

        private WavePoint startPoint;


        public WavePoint StartPoint

        {

            get { return startPoint; }

            set { startPoint = value; }

        }

        private WavePoint endPoint;


        public WavePoint EndPoint

        {

            get { return endPoint; }

            set { endPoint = value; }

        }



        private List<WavePoint> wavePoint;


        public List<WavePoint> WavePoint

        {

            get { return wavePoint; }

            set { wavePoint = value; }

        }


        /// <summary>

        /// 声导纳值达到峰值的一半处波峰的宽度

        /// </summary>

        /// <param name="ya">声导纳值峰值</param>

        /// <returns></returns>

        public float GetWaveWidth(float ya)

        {

            float result = 0;

            float middleya = ya / 2;  //峰值的一半

            List<WavePoint> lstWave = this.wavePoint;  //当前波的点的集合



            List<WavePoint> jiaodian = new List<WavePoint>();  //以一半为水平线与波交点的集合


            WavePoint lastPoint = new WavePoint();

            lastPoint = this.startPoint;


            //找出波峰与1/2声纳值的交点交点

            foreach (WavePoint item in lstWave)

            {

                //相等


                if (item.Y == middleya)

                {

                    jiaodian.Add(item);

                }

                else if ((item.Y > middleya && middleya > lastPoint.Y) || (item.Y < middleya && middleya < lastPoint.Y)) //位于两点之间

                {

                    float x = Math.Abs(middleya - lastPoint.Y) / Math.Abs(item.Y - lastPoint.Y) * 20 + lastPoint.X;

                    WavePoint newWavePoint = new WavePoint();

                    newWavePoint.X = x;

                    newWavePoint.Y = middleya;

                    jiaodian.Add(newWavePoint);

                }

                lastPoint = item;


            }


            if (jiaodian == null) return 0;


            //判断交点