JS Node

index.js

class Node{
	constructor(data) {
  	this.data = data;
    this.children = []
  }
  
  add(data) {
		this.children.push(new Node(data))
  }
}


const n = new Node(1)
n.add(2)
n.add(3)
n.children[0].add(4)
n.children[0].add(5)
n.children[1].add(6)

let result = [n]

while(result.length) {
  console.log(result[0].data);
  result.concat(result.shift().children);
}