@nighttrax/eslint-config-base/index.js

NiGhTTraX's ESLint base config

const testOverrides = require("./tests.js");
const configOverrides = require("./configs.js");

module.exports = {
  extends: [
    "eslint-config-airbnb-base/rules/best-practices",
    "eslint-config-airbnb-base/rules/errors",
    "eslint-config-airbnb-base/rules/node",
    "eslint-config-airbnb-base/rules/style",
    "eslint-config-airbnb-base/rules/variables",
    "eslint-config-airbnb-base/rules/es6",
  ]
    .map(require.resolve)
    .concat([
      // This disables all stylistic rules from the above.
      "prettier",

      "plugin:@typescript-eslint/recommended",
    ]),

  plugins: ["prettier", "import", "@typescript-eslint"],

  parser: "@typescript-eslint/parser",

  settings: {
    "import/resolver": {
      // use <root>/tsconfig.json
      typescript: {},
    },
  },

  rules: {
    "prettier/prettier": "error",

    "import/no-extraneous-dependencies": [
      "error",
      {
        devDependencies: [...testOverrides.files, ...configOverrides.files],
      },
    ],

    "one-var": "off",
    "one-var-declaration-per-line": "off",
    "prefer-arrow-callback": "off",
    strict: "off",
    "no-use-before-define": ["off", { functions: false }],
    "no-underscore-dangle": "off",
    "no-plusplus": "off",

    // Enforce curly braces even for one liners.
    curly: ["error", "all"],

    "padding-line-between-statements": [
      "error",
      { blankLine: "always", prev: "*", next: "return" },
      { blankLine: "always", prev: "*", next: "block-like" },
      { blankLine: "always", prev: "*", next: "if" },
      { blankLine: "always", prev: "*", next: "export" },
    ],

    // These core rules don't work well on TS code, use the ones from the plugin instead.
    "no-undef": "off",
    "no-unused-vars": "off",
    "no-shadow": "off",
    "no-redeclare": "off",
    "no-empty-function": "off",

    "@typescript-eslint/no-unused-vars": [
      "error",
      {
        // Allow `let { ignored, ...rest} = foo`.
        ignoreRestSiblings: true,
      },
    ],

    // Allow `constructor(private foo: number) {}`
    "no-useless-constructor": "off",

    // Allow stateless class methods, instead of forcing them to be static.
    "class-methods-use-this": 0,

    // TS will take care of this, and the rule disallows the following _valid_ pattern:
    // function(foo = 'bar', baz?: number) {}
    "default-param-last": "off",

    // The strictFunctionTypes compiler flag only works if you define your methods properly.
    "@typescript-eslint/method-signature-style": "error",
  },

  overrides: [
    testOverrides,
    {
      files: ["**/*.js"],
      rules: {
        "@typescript-eslint/no-var-requires": "off",
      },
    },
  ],
};