eslint.config.mjs

import globals from 'globals';
import babelParser from '@babel/eslint-parser';

import pluginEmber from 'eslint-plugin-ember';
import pluginEmberRecommended from 'eslint-plugin-ember/configs/recommended';
import pluginEslintJs from '@eslint/js';
import pluginNode from 'eslint-plugin-n';
import pluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
import pluginQunitRecommended from 'eslint-plugin-qunit/configs/recommended';

export default [
  pluginEslintJs.configs.recommended,
  ...pluginEmberRecommended,
  pluginPrettierRecommended,

  {
    ignores: [
      // Unconventional js
      'blueprints/*/files/',

      // Compiled output
      'declarations/',
      'dist/',

      // Misc
      'coverage/',
      '!**/.*',
      '**/.*/',

      // ember-try
      '.node_modules.ember-try/',
    ],
  },
  {
    plugins: {
      ember: pluginEmber,
    },

    languageOptions: {
      globals: {
        ...globals.browser,
      },

      parser: babelParser,
      ecmaVersion: 'latest',
      sourceType: 'module',

      parserOptions: {
        requireConfigFile: false,

        babelOptions: {
          plugins: [
            [
              '@babel/plugin-proposal-decorators',
              {
                decoratorsBeforeExport: true,
              },
            ],
          ],
        },
      },
    },
  },
  {
    // Config for Node files

    ...pluginNode.configs['flat/recommended-script'],

    files: [
      '.prettierrc.js',
      '.stylelintrc.js',
      '.template-lintrc.js',
      'ember-cli-build.js',
      'index.js',
      'testem.js',
      'blueprints/*/index.js',
      'config/**/*.js',
      'tests/dummy/config/**/*.js',
    ],

    languageOptions: {
      globals: {
        ...Object.fromEntries(
          Object.entries(globals.browser).map(([key]) => [key, 'off']),
        ),
        ...globals.node,
      },

      ecmaVersion: 5,
      sourceType: 'script',
    },
  },
  {
    // Config for test files

    ...pluginQunitRecommended,

    files: ['tests/**/*-test.{js,ts}'],
  },
];