Engineering Guidelines

Engineering Guidelines

What are the style guidelines and best practices for our engineering team.

Javascript Styles

  • 2 spaces – for indentation
  • No unused variables – this one catches tons of bugs!
  • No semicolons – It's fine. Really!
  • Never start a line with (, [, or ```
    • This is the only gotcha with omitting semicolons – automatically checked for you!
  • Space after keywords if (condition) { ... }
  • Always use === instead of == – but obj == null is allowed to check null || undefined.


The easiest way to use JavaScript Standard Style to check your code is to install it globally as a Node command line program. To do so, simply run the following command in your terminal (flag -g installs standard globally on your system, omit it if you want to install in the current working directory):

npm install standard -g

After you've done that you should be able to use the standard program. The simplest use case would be checking the style of all JavaScript files in the current working directory:

$ standard
Error: Use JavaScript Standard Style
  lib/torrent.js:950:11: Expected '===' and instead saw '=='.

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