.eslintrc.js

// mimic CommonJS variables -- not needed if using CommonJS
module.exports = {
  root: true,
  parserOptions: {
    ecmaVersion: 2021,
    sourceType: "module",
  },
  ignorePatterns: ["*.d.ts"],
  overrides: [
    {
      files: ["*.ts", "*.tsx"],
      parser: "@typescript-eslint/parser",
      parserOptions: {
        ecmaVersion: 2021,
        sourceType: "module",
        project: "./tsconfig.json",
      },
      extends: [
        "eslint:recommended",
        "plugin:@typescript-eslint/recommended",
        "plugin:@typescript-eslint/recommended-requiring-type-checking",
      ],
      plugins: ["@typescript-eslint"],
      rules: {
        eqeqeq: "error",
        "no-unused-vars": "off",
        "@typescript-eslint/no-unused-vars": [
          "error",
          {
            args: "all",
            argsIgnorePattern: "^_",
            caughtErrors: "all",
            caughtErrorsIgnorePattern: "^_",
            destructuredArrayIgnorePattern: "^_",
            varsIgnorePattern: "^_",
            ignoreRestSiblings: true,
          },
        ],
        "prefer-const": ["error", { ignoreReadBeforeAssign: true }],
        semi: "error",
        quotes: ["error", "single"],
      },
    },
  ],
};