.eslintrc.json

{
    "extends": [
        "standard",
        "plugin:promise/recommended"
    ],
    "plugins": [
        "mocha-no-only",
        "promise"
    ],
    "env": {
        "browser": true,
        "node": true,
        "mocha": true,
        "jest": true
    },
    "globals": {
        "artifacts": false,
        "contract": false,
        "assert": false,
        "web3": false,
        "usePlugin": false,
        "extendEnvironment": false
    },
    "rules": {

        // Strict mode
        "strict": ["error", "global"],

        // Code style
        "array-bracket-spacing": ["off"],
        "camelcase": ["error", {
            "properties": "always"
        }],
        "comma-dangle": ["error", "always-multiline"],
        "comma-spacing": ["error", {
            "before": false,
            "after": true
        }],
        "dot-notation": ["error", {
            "allowKeywords": true,
            "allowPattern": ""
        }],
        "eol-last": ["error", "always"],
        "eqeqeq": ["error", "smart"],
        "generator-star-spacing": ["error", "before"],
        "indent": ["error", 2],
        "linebreak-style": ["error", "unix"],
        "max-len": ["error", 120, 2],
        "no-debugger": "off",
        "no-dupe-args": "error",
        "no-dupe-keys": "error",
        "no-mixed-spaces-and-tabs": ["error", "smart-tabs"],
        "no-redeclare": ["error", {
            "builtinGlobals": true
        }],
        "no-trailing-spaces": ["error", {
            "skipBlankLines": false
        }],
        "no-undef": "error",
        "no-use-before-define": "off",
        "no-var": "error",
        "object-curly-spacing": ["error", "always"],
        "prefer-const": "error",
        "quotes": ["error", "single"],
        "semi": ["error", "always"],
        "space-before-function-paren": ["error", "always"],

        "mocha-no-only/mocha-no-only": ["error"],

        "promise/always-return": "off",
        "promise/avoid-new": "off"
    },
    "parserOptions": {
        "ecmaVersion": 2018
    }
}