Coding Style Guide for node.js apps? [closed]

I’d review the coding standards checked by JSLint or look at the author of NPM (Isaac Shlueter’s) coding standards.

You could also look at the style used by notable Node.JS coders:

• TJ Holowaychuk
• Isaac Shlueter
• Tim Caswell
• Jeremy Ashkenas
• Felix Geisendörfer
• Charlie Robbins
• Marak Squires
• Aaron Heckmann
• Guillermo Rauch
• Mikeal Rogers
• Ryan Dahl + you could look at the actual Node.JS codebase

I’ll throw mine in there for good measure 😉

Edit: Suggestions from @alienhard

• Google JavaScript style Guide
• Felix’s Node.js Style Guide

IMO there’s a few golden rules you should follow:

• Never use with or eval
• Use === over ==
• Always declare your variables with var in the appropriate scope – don’t fallback to the global scope
• Wrap your app in a closure (function(){})() if you plan on releasing code that runs server-side as well as in the browser
• Callbacks should take err as the first argument and if they themselves take a callback as an argument, it should be last, e.g. callback(err, param1, param2, callback)

Indentation, spacing between braces and keywords and semicolon placement are all a matter of preference.