.eslintrc.js

// This is the configuration file for ESLint, the TypeScript linter.
// https://eslint.org/docs/user-guide/configuring
module.exports = {
  extends: [
    // The linter base is the shared IsaacScript config.
    // https://github.com/IsaacScript/isaacscript/blob/main/packages/eslint-config-isaacscript/base.js
    "eslint-config-isaacscript/base",
  ],

  parserOptions: {
    // ESLint needs to know about the project's TypeScript settings in order for TypeScript-specific
    // things to lint correctly. We do not point this at "./tsconfig.json" because certain files
    // (such at this file) should be linted but not included in the actual project output.
    project: "./tsconfig.eslint.json",
  },

  // We modify the linting rules from the base for some specific things.
  rules: { "no-bitwise": 0, "no-param-reassign": { props: "false" } },
};