.eslintrc.js

module.exports = {
  root: true,
  parserOptions: {
    parser: '@babel/eslint-parser',
    ecmaVersion: 'latest',
    sourceType: 'module',
    requireConfigFile: false,
    babelOptions: {
      plugins: [
        ['@babel/plugin-proposal-decorators', { decoratorsBeforeExport: true }],
      ],
    },
  },
  plugins: ['ember', 'decorator-position'],
  extends: [
    'eslint:recommended',
    'airbnb-base',
    'plugin:ember/recommended',
    'plugin:decorator-position/ember',
    'plugin:prettier/recommended',
  ],
  env: {
    browser: true,
  },
  globals: {
    $: true,
    d3: true,
  },
  rules: {
    'import/no-extraneous-dependencies': 0,
    'import/no-unresolved': 0,
    'import/extensions': 0,
    'lines-around-directive': 0,
    'func-names': 0,
    'space-before-function-paren': 0,
    'prefer-arrow-callback': 0,
    'no-underscore-dangle': 0,
    camelcase: 0,
    'class-methods-use-this': 0,
    'max-len': 0,
    'no-param-reassign': 0,
    'no-undef': 0,
    'ember/no-classic-components': 'warn',
    'ember/no-classic-classes': 'warn',
    'ember/no-get': 'warn',
    'ember/no-actions-hash': 'warn',
    'ember/require-tagless-components': 'warn',
    'ember/no-observers': 'warn',
    'ember/classic-decorator-no-classic-methods': 'warn',
    'ember/classic-decorator-hooks': 'warn',
    'ember/no-component-lifecycle-hooks': 'warn',
    'ember/no-empty-glimmer-component-classes': 'warn',
    'ember/require-computed-macros': 'warn',
    'ember/no-computed-properties-in-native-classes': 'warn',
    'ember/no-legacy-test-waiters': 'warn',
    'ember/no-mixins': 'warn',
    'ember/no-new-mixins': 'warn',
    'ember/avoid-leaking-state-in-ember-objects': 'warn',
    'ember/no-incorrect-calls-with-inline-anonymous-functions': 'warn',
    'max-classes-per-file': 0,
    'decorator-position/decorator-position': 0,
  },
  overrides: [
    // node files
    {
      files: [
        './.eslintrc.js',
        './.prettierrc.js',
        './.stylelintrc.js',
        './.template-lintrc.js',
        './ember-cli-build.js',
        './testem.js',
        './blueprints/*/index.js',
        './config/**/*.js',
        './lib/*/index.js',
        './server/**/*.js',
      ],
      parserOptions: {
        sourceType: 'script',
      },
      env: {
        browser: false,
        node: true,
      },
      extends: ['plugin:n/recommended'],
    },
  ],
};