.eslintrc.json

{
	"parserOptions": {
		"ecmaVersion": 2018,
		"sourceType": "module",
		"ecmaFeatures": {
			"modules": true
		}
	},
	"extends": [
		"eslint:recommended"
	],
	"plugins": [],
	"ignorePatterns": ["node_modules", "js/libraries", "temp"],
	"env": {
		"es6": true,
		"browser": true,
		"node": true,
		"commonjs": true,
		"jquery": true
	},
	"globals": {
		"LZString": "readonly",
		"saveAs": "readonly",
		"ClipboardJS": "readonly"
	},
	"rules": {
		"no-trailing-spaces": ["error", { "skipBlankLines": true }],
		"semi": ["error", "always"],
		"array-bracket-newline": ["error", { "multiline": true, "minItems": 3 }],
		"indent": ["error", 4, { "VariableDeclarator": { "var": 2, "let": 2, "const": 3 } }],
		"implicit-arrow-linebreak": ["error", "beside"],
		"no-whitespace-before-property": "error",
		"no-multi-spaces": "error",
		"no-multiple-empty-lines": ["error", { "max": 1, "maxEOF": 0 }],
		"camelcase": "error",
		"brace-style": ["error", "1tbs", { "allowSingleLine": true }],
		"no-confusing-arrow": "error",
		"padded-blocks": ["error", "never", { "allowSingleLineBlocks": true }],
		"eol-last": ["error", "always"],
		"no-lonely-if": "error",
		"no-underscore-dangle": "error",
		"quotes": ["error", "single", { "allowTemplateLiterals": true }],
		"semi-style": ["error", "last"],
		"padding-line-between-statements": ["error",
			{ "blankLine": "always", "prev": ["const", "let", "var"], "next": "*"},
			{ "blankLine": "any",    "prev": ["const", "let", "var"], "next": ["const", "let", "var"]},
			{ "blankLine": "always", "prev": "directive", "next": "*" },
			{ "blankLine": "any",    "prev": "directive", "next": "directive" }
		],
		"no-unused-vars": ["error", { "argsIgnorePattern": "^_" }],
		"keyword-spacing": ["error", { "before": true }],
		"space-before-blocks": "error",
		"arrow-spacing": "error",
		"space-infix-ops": ["error", { "int32Hint": false }]
	}
}