My current .eslint file

.eslintrc

{
  "env": {
    "browser": false,
    "node": true,
    "es6": true,
    "mocha": false
  },
  "parserOptions": {
      "sourceType": "module",
      "ecmaVersion": 8,
  },
  
  "extends": "eslint:recommended",
  
  "ecmaFeatures": {
    "arrowFunctions": true,
    "blockBindings": true,
    "classes": true,
    "defaultParams": true,
    "modules": true,
    "spread": true,
    "globalReturn": true,
  },
  "rules": {
    "camelcase": 0,
    "no-extraneous-dependencies": 0,
    "no-var": 1,
    "no-eval": "error",
    "indent": ["error", 2],
    "quotes": ["error", "single"],
    "space-before-function-paren": ["error", "never"],
    "padded-blocks": 0,
    "prefer-arrow-callback": [0, { "allowNamedFunctions": true }],
    "func-names": ["error", "never"],
    "no-use-before-define": [
      "error", {
        "functions": true,
        "classes": true
      }
    ],
    "max-nested-callbacks": [
      "error",
      5
    ],
  }
}