.eslintrc.json

{
  "env": {
    "browser": true,
    "es2021": true,
    "node": true
  },
  "extends": ["eslint:recommended", "prettier"],
  "parserOptions": {
    "sourceType": "module",
    "ecmaVersion": "latest"
  },
  "rules": {
    "no-console": "warn",
    "no-debugger": "warn",
    "no-unused-vars": [
      "warn",
      { "argsIgnorePattern": "^_", "varsIgnorePattern": "^_" }
    ],
    "no-undef": "error",
    "no-dupe-keys": "error",
    "no-duplicate-case": "error",
    "no-empty": ["error", { "allowEmptyCatch": true }],
    "no-extra-semi": "error",
    "no-multiple-empty-lines": ["error", { "max": 1, "maxEOF": 0 }],
    "no-trailing-spaces": "error",
    "no-var": "error",
    "prefer-const": "error",
    "semi": ["error", "always"],
    "comma-spacing": ["error", { "before": false, "after": true }],
    "eol-last": ["error", "always"],
    "func-call-spacing": ["error", "never"],
    "key-spacing": ["error", { "beforeColon": false, "afterColon": true }],
    "keyword-spacing": ["error", { "before": true, "after": true }],
    "no-extra-parens": ["error", "all", { "nestedBinaryExpressions": false }],
    "no-multi-spaces": ["error", { "ignoreEOLComments": true }],
    "no-spaced-func": "error",
    "object-curly-spacing": ["error", "always"],
    "prefer-arrow-callback": "error",
    "prefer-numeric-literals": "error",
    "prefer-rest-params": "error",
    "prefer-spread": "error",
    "quote-props": ["error", "as-needed"],
    "space-before-blocks": "error",
    "space-in-parens": ["error", "never"],
    "space-infix-ops": "error",
    "space-unary-ops": ["error", { "words": true, "nonwords": false }],
    "switch-colon-spacing": "error"
  }
}