.eslintrc.json

{
  "env": {
    "browser": true,
    "es2021": true,
    "node": true,
    "jest": true,
    "atomtest": true
  },
  "extends": [
    "eslint:recommended",
    "plugin:import/recommended"
  ],
  "parser": "@babel/eslint-parser",
  "parserOptions": {
    "ecmaVersion": 2021,
    "sourceType": "module"
  },
  "plugins": [
    "@babel"
  ],
  "settings": {
    "import/core-modules": ["atom"]
  },
  "rules": {
    "array-bracket-newline": ["error", "consistent"],
    "array-bracket-spacing": ["error", "never"],
    "arrow-body-style": ["error", "always"],
    "arrow-parens": "error",
    "arrow-spacing": "error",
    "block-scoped-var": "error",
    "block-spacing": ["error", "always"],
    "brace-style": ["error", "1tbs", { "allowSingleLine": true }],
    "camelcase": "error",
    "comma-dangle": ["error", "only-multiline"],
    "comma-spacing": ["error", { "before": false, "after": true }],
    "comma-style": ["error", "last"],
    "computed-property-spacing": ["error", "never", { "enforceForClassMembers": true }],
    "consistent-return": "error",
    "curly": "error",
    "default-case-last": "error",
    "default-param-last": ["error"],
    "dot-location": ["error", "property"],
    "eol-last": ["error", "always"],
    "eqeqeq": ["error", "always"],
    "func-call-spacing": ["error", "never"],
    "func-style": ["error", "declaration"],
    "function-call-argument-newline": ["error", "consistent"],
    "function-paren-newline": ["error", "consistent"],
    "indent": ["error", 2],
    "key-spacing": "error",
    "keyword-spacing": "error",
    "lines-between-class-members": ["error", "always"],
    "new-parens": "error",
    "no-array-constructor": "error",
    "no-confusing-arrow": "error",
    "no-console": "warn",
    "no-else-return": "error",
    "no-eval": "error",
    "no-extra-semi": "error",
    "no-lonely-if": "error",
    "no-multi-spaces": ["error", { "ignoreEOLComments": true }],
    "no-multiple-empty-lines": ["error", { "max": 1, "maxBOF": 0, "maxEOF": 1 }],
    "no-return-assign": "error",
    "no-return-await": "error",
    "no-shadow": "error",
    "no-tabs": "error",
    "no-template-curly-in-string": "error",
    "no-unneeded-ternary": "error",
    "no-var": "error",
    "no-warning-comments": "error",
    "no-whitespace-before-property": "error",
    "object-curly-newline": ["error", { "consistent": true }],
    "object-curly-spacing": ["error", "always"],
    "prefer-const": "error",
    "prefer-rest-params": "error",
    "prefer-spread": "error",
    "prefer-template": "error",
    "rest-spread-spacing": ["error", "never"],
    "semi": "error",
    "semi-spacing": "error",
    "semi-style": ["error", "last"],
    "sort-imports": ["error", { "ignoreCase": true, "ignoreDeclarationSort": false }],
    "space-before-blocks": "error",
    "space-before-function-paren": ["error", "never"],
    "space-in-parens": ["error", "never"],
    "space-infix-ops": "error",
    "space-unary-ops": "error",
    "spaced-comment": "warn",
    "switch-colon-spacing": "error",
    "template-curly-spacing": ["error", "never"],
    "quotes": ["error", "single", { "allowTemplateLiterals": true }]
  },
  "overrides": [
    {
      "files": ["*.json"],
      "parser": "jsonc-eslint-parser",
      "extends": [
        "plugin:jsonc/recommended-with-jsonc"
      ],
      "rules": {
        "jsonc/auto": "error"
      }
    }
  ]
}