.eslintrc.json

{
  "extends": [
    "airbnb-base",
    "eslint:recommended",
    "plugin:eslint-plugin/recommended",
    "plugin:import/recommended"],
  // add your environment below the extends key, like this:
  "env": {
    "es6": true,
    "browser": true,
    "mocha": true,
    "node": true
  },
  "plugins": ["import","eslint-plugin"],
  "parserOptions": {
      "ecmaVersion": 8
  },
  "rules": {
    "no-underscore-dangle": 0,
    "comma-dangle": ["error", {
      "arrays": "always-multiline",
      "objects": "always-multiline",
      "imports": "always-multiline",
      "exports": "always-multiline",
      "functions": "always-multiline"
  }],
    "comma-style": [2, "last"],
    "curly": [2, "multi-line"],
    "eol-last": [2, "always"],
    "eqeqeq": [2, "allow-null"],
    "func-call-spacing": 2,
    "indent": [2, 2],
    "keyword-spacing": ["error", {
      "before": true,
      "after": true,
      "overrides": {
        "return": { "after": true },
        "throw": { "after": true },
        "case": { "after": true }
      }
    }],
    "max-len": ["error", 120, 2, { "ignoreComments": true }],
    "no-multiple-empty-lines": ["error", { "max": 2, "maxEOF": 1 }],
    "no-cond-assign": [2, "always"],
    "no-return-assign": [2, "always"],
    "no-var": 2,
    "object-curly-spacing": [2, "always"],
    "object-shorthand": ["error", "always", {
        "ignoreConstructors": false,
        "avoidQuotes": true
    }],
    "one-var": [2, "never"],
    "prefer-const": 2,
    "quotes": [2, "single", {
        "allowTemplateLiterals": true,
        "avoidEscape": true
    }],
    "semi": [2, "always"],
    "space-before-function-paren": ["error", {
        "anonymous": "always",
        "named": "never",
        "asyncArrow": "always"
    }],
    "eslint-plugin/consistent-output": [
        "error",
        "always"
    ],
    "eslint-plugin/meta-property-ordering": "error",
    "eslint-plugin/no-deprecated-context-methods": "error",
    "eslint-plugin/no-deprecated-report-api": "off",
    "eslint-plugin/prefer-replace-text": "error",
    "eslint-plugin/report-message-format": "error",
    "eslint-plugin/require-meta-schema": "error",
    "eslint-plugin/require-meta-type": "error",
    "import/prefer-default-export": "off",
    "import/extensions" : "off"
    // "import/no-extraneous-dependencies": "off",
  }
}