Usage to lint both schema/documents

import js from '@eslint/js';
import graphqlPlugin from '@graphql-eslint/eslint-plugin';
 
export default [
  {
    files: ['**/*.{js,tsx}'],
    rules: js.configs.recommended.rules,
  },
  {
    files: ['client/**/*.tsx'],
    // Setup processor for operations/fragments definitions on code-files
    processor: graphqlPlugin.processor,
    languageOptions: {
      parserOptions: {
        ecmaFeatures: {
          jsx: true,
        },
      },
    },
  },
  {
    // Setup GraphQL Parser
    files: ['**/*.{graphql,gql}'],
    languageOptions: {
      parser: graphqlPlugin.parser,
    },
    plugins: {
      '@graphql-eslint': graphqlPlugin,
    },
  },
  {
    // Setup recommended config for schema files
    files: ['server/**/*.gql'],
    rules: graphqlPlugin.configs['flat/schema-recommended'].rules,
  },
  {
    // Setup recommended config for operations files
    files: ['client/**/*.{graphql,gql}'],
    rules: graphqlPlugin.configs['flat/operations-recommended'].rules,
  },
];
 

/**
 * Legacy config example, should be run with `ESLINT_USE_FLAT_CONFIG=false` environment variable in ESLint 9
 */
 
module.exports = {
  root: true,
  // ❗️ It's very important that you don't have any rules configured at the top-level config,
  // and to move all configurations into the overrides section. Since JavaScript rules
  // can't run on GraphQL files and vice versa, if you have rules configured at the top level,
  // they will try to also execute for all overrides, as ESLint's configs cascade
  overrides: [
    {
      files: '*.tsx',
      extends: 'eslint:recommended',
      env: {
        es2022: true,
      },
    },
    {
      files: 'client/**/*.tsx',
      parserOptions: {
        sourceType: 'module',
        ecmaFeatures: {
          jsx: true,
        },
      },
    },
    {
      // Setup GraphQL Parser
      files: '*.{graphql,gql}',
      parser: '@graphql-eslint/eslint-plugin',
      plugins: ['@graphql-eslint'],
    },
    {
      // Setup processor for operations/fragments definitions on code-files
      files: 'client/**/*.tsx',
      processor: '@graphql-eslint/graphql',
    },
    {
      // Setup recommended config for schema files
      files: 'server/**/*.gql',
      extends: 'plugin:@graphql-eslint/schema-recommended',
      rules: {
        // Override graphql-eslint rules for schema files
      },
    },
    {
      // Setup recommended config for operations files
      files: 'client/**/*.{graphql,gql}',
      extends: 'plugin:@graphql-eslint/operations-recommended',
      rules: {
        // Override graphql-eslint rules for operations files
      },
    },
  ],
};