laser not working need changes

 hey guys can someone translate this to a java script? or somthing that works the same 
 
     using UnityEngine;
     using System.Collections;
     
     public class Laserbeam : MonoBehaviour {
     
         private LineRenderer lineRenderer;
          private float counter;
         private float dist;
     
         public float damage = 1000.0f;
         public Transform Weapon;
         public Transform Enemy;
     
     
         public float lineDrawSpeed =6f;
     
         // Use this for initialization
         void Start () 
         {
             lineRenderer = GetComponent<LineRenderer>();
             lineRenderer.SetPosition (0, Weapon.position);
             lineRenderer.SetWidth (.10f, .10f);
     
             dist = Vector3.Distance(Weapon.position, Enemy.position);
         
         }
     
         
         // Update is called once per frame
         void Update () 
         {
             if(counter < dist) 
             {
                 counter += .1f / lineDrawSpeed;
     
                 float x = Mathf.Lerp(0, dist, counter);
     
                 Vector3 pointA = Weapon.position;
                 Vector3 pointB = Enemy.position;
     
                 Vector3 pointAlongLine = x * Vector3.Normalize (pointB - pointA) + pointA;
     
                 lineRenderer.SetPosition(1, pointAlongLine);
             }
         }
     }