Eslint config with rules I believe are sensible and consistent

.eslintrc.json

{
  "env": {
    "node": true,
    "es2021": true,
    "commonjs": true,
    "mocha": true
  },
  "extends": "eslint:recommended",
  "parserOptions": {
    "ecmaVersion": 12
  },
  "rules": {
    "comma-dangle": 1,
    "comma-spacing": [
      "error",
      {
        "before": false,
        "after": true
      }
    ],
    "eqeqeq": 1,
    "no-cond-assign": 1,
    "no-console": 1,
    "no-dupe-args": 1,
    "no-dupe-keys": 1,
    "no-empty": 1,
    "no-extra-semi": 1,
    "no-sparse-arrays": 1,
    "no-unreachable": 1,
    "semi": 2,
    "valid-typeof": 1,
    "object-curly-spacing": [
      "error",
      "always",
      {
        "arraysInObjects": true
      }
    ],
    "curly": [
      "error",
      "all"
    ],
    "prefer-destructuring": [
      "error",
      {
        "array": true,
        "object": true
      }
    ],
    "object-shorthand": "error",
    "prefer-const": "error",
    "quotes": ["error", "single"],
    "prefer-template": "error",
    "no-useless-concat": "error"
  }
}