.eslintrc.js

module.exports = {
  root: true,
  env: {
    es6: true,
    node: true,
    jest: true,
  },
  extends: [
    "eslint:recommended",
    "plugin:import/errors",
    "plugin:import/warnings",
    "plugin:import/typescript",
    "google",
    "plugin:@typescript-eslint/recommended",
    "plugin:prettier/recommended",
  ],
  parser: "@typescript-eslint/parser",
  parserOptions: {
    project: "./tsconfig.json",
    tsconfigRootDir: __dirname,
    ecmaVersion: "2017",
    sourceType: "module",
  },
  ignorePatterns: [
    "/lib/**/*", // Ignore built files.
    "/generated/**/*", // Ignore generated files.
  ],
  plugins: [
    "@typescript-eslint",
    "import",
    "unused-imports",
  ],
  rules: {
    "class-methods-use-this": "off",
    "complexity": ["error", 10],
    "eqeqeq": "error",
    "import/no-named-as-default": "off",
    "import/no-unresolved": 0,
    "indent": ["error", 2],
    "max-depth": ["error", 3],
    "max-len": [
      "warn",
      {
        code: 120,
        ignoreComments: true,
        ignoreTemplateLiterals: true,
        ignorePattern: "^import .*",
      },
    ],
    "max-lines-per-function": [
      "warn",
      {
        max: 50,
        skipBlankLines: true,
        skipComments: true,
      },
    ],
    "max-params": ["error", 5],
    "no-console": "warn",
    "no-use-before-define": "warn",
    "no-var": "error",
    "object-property-newline": "error",
    "object-shorthand": "error",
    "prefer-const": "error",
    "prefer-destructuring": "warn",
    "prefer-rest-params": "warn",
    "prefer-spread": "warn",
    "prefer-template": "error",
    "quotes": [
      "error",
      "single",
      {
        avoidEscape: true,
        allowTemplateLiterals: true,
      },
    ],
    "yoda": "error",
    "unused-imports/no-unused-imports": "error",
    "unused-imports/no-unused-vars": [
      "warn",
      {
        vars: "all",
        varsIgnorePattern: "^_",
        args: "after-used",
        argsIgnorePattern: "^_",
      },
    ],
    "require-jsdoc": "off",
    "@typescript-eslint/ban-ts-comment": "off",
    "@typescript-eslint/no-explicit-any": "off",
    "@typescript-eslint/no-unused-vars": [
      "error",
      {
        argsIgnorePattern: "^_",
        ignoreRestSiblings: true,
      },
    ],
    "@typescript-eslint/quotes": [
      "error",
      "single",
      {
        avoidEscape: true,
        allowTemplateLiterals: true,
      },
    ],
  },
};