Generally, static analysis of code to:

Enforce

Find Possible

Encourage

Errors

Best Practices

Style Consistency

Custom Rules

Custom Formatters

Custom Parsers

Rules

Turn on or off

Set to warn or error

"Agenda Free"

ES6 / ES7 Syntax

Integrations

Editors

(Sublime Text, Atom, vim, Emacs, JetBrains, etc.)

Build Tools

(Grunt, Gulp, Broccoli, mocha-eslint, npm, etc.)

# Setup Config

$ eslint --init

# Start Linting

$ eslint test.js test2.js