.eslintrc.js

module.exports = {
    env: {
      node: true,
      es2021: true
    },
    extends: "eslint:recommended",
    parserOptions: {
      ecmaVersion: 12
    },
    ignorePatterns: ["/node_modules", "eval.js"],
    rules: {
      semi: ["error", "always"],
      quotes: ["error", "double"],
      eqeqeq: ["error", "always"],
      camelcase: "error",
      "key-spacing": "error",
      "keyword-spacing": "error",
      "no-mixed-spaces-and-tabs": "error",
      "no-multiple-empty-lines": "error",
      "prefer-arrow-callback": "error",
      "no-use-before-define": ["error", { "functions": false, "classes": true }],
      "no-else-return": ["error", { allowElseIf: false }],
      "prefer-const": ["error", { "destructuring": "any", "ignoreReadBeforeAssign": false }],
      "no-unused-vars": ["error", { "vars": "all", "args": "after-used", "ignoreRestSiblings": false }]
    }
  };