eslint.config.js

// @ts-check

// Allows us to bring in the recommended core rules from eslint itself
const eslint = require('@eslint/js');

// Allows us to use the typed utility for our config, and to bring in the recommended rules for TypeScript projects from typescript-eslint
const tseslint = require('typescript-eslint');

// Allows us to bring in the recommended rules for Angular projects from angular-eslint
const angular = require('angular-eslint');
const eslintPluginPrettierRecommended = require('eslint-plugin-prettier/recommended');

// Export our config array, which is composed together thanks to the typed utility function from typescript-eslint
module.exports = tseslint.config(
  {
    languageOptions: {
      parserOptions: {
        project: './tsconfig.json',
      },
    },
    // Everything in this config object targets our TypeScript files (Components, Directives, Pipes etc)
    files: ['**/*.ts'],
    extends: [
      // Apply the recommended core rules
      eslint.configs.recommended,
      // Apply the recommended TypeScript rules
      ...tseslint.configs.strictTypeChecked,
      // Optionally apply stylistic rules from typescript-eslint that improve code consistency
      ...tseslint.configs.stylisticTypeChecked,
      // Apply the recommended Angular rules
      ...angular.configs.tsRecommended,
      eslintPluginPrettierRecommended,
    ],

    // Set the custom processor which will allow us to have our inline Component templates extracted
    // and treated as if they are HTML files (and therefore have the .html config below applied to them)
    processor: angular.processInlineTemplates,
    // Override specific rules for TypeScript files (these will take priority over the extended configs above)
    rules: {
      '@angular-eslint/directive-selector': [
        'error',
        {
          type: 'attribute',
          prefix: 'app',
          style: 'camelCase',
        },
      ],
      '@angular-eslint/component-selector': [
        'error',
        {
          type: 'element',
          prefix: 'app',
          style: 'kebab-case',
        },
      ],
      'no-console': [
        'error',
        {
          allow: ['warn', 'error'],
        },
      ],
    },
  },
  {
    // Everything in this config object targets our HTML files (external templates,
    // and inline templates as long as we have the `processor` set on our TypeScript config above)
    files: ['**/*.html'],
    extends: [
      // Apply the recommended Angular template rules
      ...angular.configs.templateRecommended,
      // Apply the Angular template rules which focus on accessibility of our apps
      ...angular.configs.templateAccessibility,
    ],
    rules: {},
  }
);