SOURCE

 var pid = document.getElementById('pid');
randomGoN(10,20)
function randomGoN(n=1,end=10){
  var arr = [];
        for(var i=0;i<n;i++){
            getx(arr);
        }

        function getx(arr){
            for(var i=0;i>-1;i++){
                var flag = true;
                var num = Math.floor(Math.random()*end)+1;
                for(var i in arr){
                    if(arr[i] == num){
                        flag= false;
                        break;
                    }
                }
                if(flag == true){
                    console.log(num);
                    arr.push(num);
                    return;
                }
            }
        } 
  pid.innerHTML = arr;
}
        

      

<p id="pid"></p>