.eslintrc.js

module.exports = {
	"env": {
		"browser": true,
		"jquery": true,
		"es6": true,
	},
	"extends": "wordpress",
	"installedESLint": true,
	"plugins": [],
	"rules": {
		// Enforce spacing inside array brackets
		'array-bracket-spacing': ['error', 'always'],
		// Enforce one true brace style
		'brace-style': 'error',
		// Require camel case names
		'camelcase': ['error', {
			properties: 'always'
		}],
		// Disallow or enforce trailing commas
		'comma-dangle': ['error', 'never'],
		// Enforce spacing before and after comma
		'comma-spacing': 'error',
		// Enforce one true comma style
		'comma-style': ['error', 'last'],
		// Encourages use of dot notation whenever possible
		'dot-notation': ['error', {
			allowKeywords: true,
			allowPattern: '^[a-z]+(_[a-z]+)+$'
		}],
		// Enforce newline at the end of file, with no multiple empty lines
		'eol-last': 'error',
		// Require or disallow spacing between function identifiers and their invocations
		'func-call-spacing': 'off',
		// Enforces spacing between keys and values in object literal properties
		'key-spacing': ['error', {
			beforeColon: false,
			afterColon: true
		}],
		// Enforce spacing before and after keywords
		'keyword-spacing': 'error',
		// Disallow mixed "LF" and "CRLF" as linebreaks
		'linebreak-style': ['error', 'unix'],
		// Enforces empty lines around comments
		'lines-around-comment': ['error', {
			beforeLineComment: true
		}],
		// Disallow mixed spaces and tabs for indentation
		'no-mixed-spaces-and-tabs': 'error',
		// Disallow use of multiline strings
		'no-multi-str': 'error',
		// Disallow multiple empty lines
		'no-multiple-empty-lines': 'error',
		// Disallow use of the with statement
		'no-with': 'error',
		// Require or disallow an newline around variable declarations
		'one-var-declaration-per-line': ['error', 'initializations'],
		// Enforce operators to be placed before or after line breaks
		'operator-linebreak': ['error', 'after'],
		// Require or disallow use of semicolons instead of ASI
		'semi': ['error', 'always'],
		// Require or disallow space before blocks
		'space-before-blocks': ['error', 'always'],
		// Require or disallow space before function opening parenthesis
		'space-before-function-paren': ['error', 'never'],
		// Require or disallow space before blocks
		'space-in-parens': ['error', 'always', {exceptions: ['{}', '[]']}],
		// Require spaces around operators
		'space-infix-ops': 'error',
		// Require or disallow spaces before/after unary operators (words on by default, nonwords)
		'space-unary-ops': ['error', {
			overrides: {'!': true}
		}],
		// Requires to declare all vars on top of their containing scope
		'vars-on-top': 'error',
		// Require or disallow Yoda conditions
		'yoda': ['error', 'always']
	}
}