#js

js exposes presets for Rslint's built-in implementation of supported ESLint 10.x core rules. Its preset is based on the configuration published by @eslint/js 10.x.

import { defineConfig, js } from '@rslint/core';

export default defineConfig([js.configs.recommended]);

#Presets

See Rules & Presets for guidance on choosing and layering presets.

#Differences from ESLint

Unlike the upstream preset, js.configs.recommended intentionally omits no-undef.

The rule is only accurate when all globals provided by browsers, Node.js, and other environments are declared in the configuration. Because a general-purpose preset cannot know which environments apply to each file, enabling the rule by default would report valid global references until users add the corresponding environment-specific configuration.

To enable this check, declare the globals available to matching files first:

import { defineConfig, globals, js } from '@rslint/core';

export default defineConfig([
  js.configs.recommended,
  {
    files: ['src/**/*.{js,jsx}'],
    languageOptions: {
      globals: {
        ...globals.browser,
      },
    },
    rules: {
      'no-undef': 'error',
    },
  },
]);