.eslintrc.js

module.exports = {
  env: {
    browser: true,
    es6: true,
  },
  parser: "@typescript-eslint/parser",
  extends: [
    "plugin:@typescript-eslint/recommended",
    "prettier",
    "prettier/@typescript-eslint",
  ],
  parserOptions: {
    ecmaVersion: 2018,
    sourceType: "module",
    project: "./tsconfig.json",
  },
  plugins: ["prettier"],
  rules: {
    "prettier/prettier": "warn",
    "linebreak-style": ["error", "unix"],
    eqeqeq: ["error", "smart"],
    "@typescript-eslint/no-for-in-array": ["error"],
    "@typescript-eslint/explicit-member-accessibility": [
      "error",
      { accessibility: "no-public" },
    ],
    "@typescript-eslint/explicit-function-return-type": [
      "error",
      { allowExpressions: true, allowTypedFunctionExpressions: true },
    ],
  },
};