Node.js has had a concept of API stability for at least a couple years; you can see it listed in all the docs. If you want something to work nigh indefinitely,

Node.js has had a concept of API stability for at least a couple years; you can see it listed in all the docs. If you want something to work nigh indefinitely, stick to Stable or Frozen. Unless something radically changes, node is just as good as any other popular dynamically-typed language implementation out there. Probably better than most.