.eslintrc.js

module.exports = {
  env: {
    browser: true,
    node: true,
    es2017: true,
    mocha: true,
  },
  parser: "@typescript-eslint/parser",
  parserOptions: {
    sourceType: "module",
  },
  plugins: ["@typescript-eslint", "import"],
  extends: [
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:prettier/recommended",
  ],
  rules: {
    "import/default": ["error"],
    "import/first": ["error"],
    "import/order": [
      "error",
      {
        alphabetize: {
          order: "asc",
          caseInsensitive: true,
        },
        groups: [
          "builtin",
          "external",
          "internal",
          ["parent", "sibling"],
          "index",
          "object",
          "type",
        ],
        "newlines-between": "always",
      },
    ],
    "@typescript-eslint/no-use-before-define": "warn",
    "@typescript-eslint/no-empty-function": "warn",
    "@typescript-eslint/no-unused-vars": ["warn", { argsIgnorePattern: "^_" }],
    "@typescript-eslint/consistent-type-definitions": ["error", "interface"],
  },
  overrides: [
    {
      files: ["test/**/*"],
      rules: {
        "@typescript-eslint/no-unused-expressions": "off",
        "@typescript-eslint/no-require-imports": "off",
      },
    },
  ],
};