.eslintrc.js

module.exports = {
    "extends": "eslint:recommended",
    "env": {
        "es6": true,
        "browser": true,
        "node": true,
        "mocha": true,
        "jest": true
    },
    "globals": {
        "artifacts": false,
        "contract": false,
        "assert": false,
        "web3": false
    },
    "parserOptions": {
        "ecmaVersion": 8
    },
    "rules": {

        // Strict mode
        "strict": 0,

        // Code style
        "indent": ["error", 4, {
            "SwitchCase": 1
        }],
        "quotes": [2, "single"],
        "semi": ["error", "always"],
        "space-before-function-paren": ["error", "always"],
        "no-use-before-define": 0,
        "eqeqeq": [2, "smart"],
        "dot-notation": [2, {
            "allowKeywords": true,
            "allowPattern": ""
        }],
        "no-redeclare": [2, {
            "builtinGlobals": true
        }],
        "no-trailing-spaces": [2, {
            "skipBlankLines": true
        }],
        "eol-last": 1,
        "comma-spacing": [2, {
            "before": false,
            "after": true
        }],
        "camelcase": [2, {
            "properties": "always"
        }],
        "no-mixed-spaces-and-tabs": [2, "smart-tabs"],
        "comma-dangle": [1, "only-multiline"],
        "no-dupe-args": 2,
        "no-dupe-keys": 2,
        "no-debugger": 0,
        "no-undef": 2,
        "one-var": [0],
        "object-curly-spacing": [2, "always"],
        "generator-star-spacing": ["error", "before"],
        "padded-blocks": 0,
        "no-unused-expressions": 0,
        "arrow-body-style": 0,
        "no-extra-semi": 0
    }
};