My ESLint config (work-in-progress)

.eslintrc.js

module.exports = exports = {
	"env": {
		"browser": true,
		"es6": true,
	},

	"plugins": ["es"],

	"extends": "eslint:recommended",

	"rules": {

		// Use tabs for indentation
		"indent": ["warn", "tab", {
			"ignoredNodes": ["TemplateLiteral *"]
		}],

		// Allow object.hasOwnKey() property
		"no-prototype-builtins": ["off"],

		// Enforce single quotes
		"quotes": ["error", "single", {
			"allowTemplateLiterals": true
		}],

		// Require semicolons
		"semi": ["error", "always"],
		"semi-style": ["error", "last"],

		// Require strict equality tests
		"eqeqeq": ["error", "always"],

		// Require dot notation when possible
		"dot-notation": ["error"],

		// Disallow spaces in parentheses, arrays, and objects
		// Also disallow spaces between function calls
		"space-in-parens": ["error", "never"],
		"object-curly-spacing": ["error", "never"],
		"array-bracket-spacing": ["error", "never"],
		"computed-property-spacing": ["error", "never"],
		"func-call-spacing": ["error", "never"],
		"function-paren-newline": ["error", "consistent"],
		"object-curly-newline": ["error", {"consistent": true}],
		"no-trailing-spaces": "error",
		"no-irregular-whitespace": ["error", { "skipComments": true }],
		"no-multi-spaces": "error",

		// Require spacing after blocks, commas, and keywords
		"block-spacing": "error",
		"space-before-blocks": "error",
		"comma-spacing": ["error", {"before": false, "after": true}],
		"keyword-spacing": ["error", {"before": true, "after": true}],
		"key-spacing": ["error", {"beforeColon": false, "afterColon": true}],
		"semi-spacing": ["error", {"before": false, "after": true}],
		"space-before-function-paren": "error",
		"space-infix-ops": ["error", {"int32Hint": false}],
		"spaced-comment": ["error", "always", {"block": {"markers": ["!"], "balanced": true}}],
		"switch-colon-spacing": "error",

		// Enforce "1 true style" if/else statements
		"brace-style": "error",

		// Require commas after items in arrays
		"comma-style": ["error", "last"],

		// Disallow lonely if statements
		"no-lonely-if": "error",

		// Disallow variable mutli-assignment
		"no-multi-assign": "error",

		// Disallow ternary operators when nested
		// or when simpler options exist
		"no-nested-ternary": "error",
		"no-unneeded-ternary": "error",

		// No fat arrow functions
		"es/no-arrow-functions": "error",

	},

};