Since Node.js code is JavaScript, any JavaScript-aware editor will be useful. Unlike some other languages that are so complex that an IDE with code completion is a necessity, a simple programming editor is perfectly sufficient for Node.js development.
Two editors are worth shouting out because they are written in Node.js: Atom and Microsoft Visual Studio Code.
Atom (https://atom.io/) describes itself as a hackable editor for the 21st century. It is extendable by writing Node.js modules using the Atom API and the configuration files are easily editable. In other words, it's hackable in the same way plenty of other editors have been—going back to Emacs, meaning you write a software module to add capabilities to the editor. The Electron framework was invented in order to build Atom and it is is a super-easy way of building desktop applications using Node.js.
Microsoft Visual Studio Code (https://code.visualstudio.com/) is a hackable...
