SOURCE

let Stack=(function(){
  const items= new WeakMap();
  class Stack {
    	constructor(){
        items.set(this,[]);
      }
    push(el){
      let s=items.get(this);
      s.push(el)
    }
    pop(){
      let s=items.get(this)
      return s.pop();
    }
    peek(){
       let s=items.get(this)
      return s[s.length-1]
    }
    isEmpty(){
       let s=items.get(this)
      return s.length==0;
    }
    size(){
       let s=items.get(this)
      return s.length;
    }
    clear(){
      let s=items.get(this)
      s=[]; 
    }
    print(){
       let s=items.get(this)
      console.log(s.toString());
    }
  } 
   
  return Stack;
})();

function divdeBy2(decNumber,base){
  var remStack=new Stack(),
  rem,
  binaryString='',
  digits='0123456789ABCDEF';
  while(decNumber>0){
    rem=Math.floor(decNumber%base);
    remStack.push(rem);
    decNumber=Math.floor(decNumber/base);
  }
  
  while(!remStack.isEmpty()){
   // binaryString+=remStack.pop().toString();
    binaryString+=digits[remStack.pop()];
    // console.log(binaryString);
  }
  console.log(binaryString);
  return binaryString;
}

divdeBy2(100,16)