eslint.config.js

// @ts-check
import eslint from "@eslint/js";
import tsParser from "@typescript-eslint/parser";
import astroParser from "astro-eslint-parser";
import eslintPluginAstro from "eslint-plugin-astro";
import tseslint from "typescript-eslint";

export default tseslint.config(
  eslint.configs.recommended,
  ...tseslint.configs.strict,
  ...tseslint.configs.stylistic,
  {
    ignores: ["**/*.astro", "**/dist", "**/node_modules", "dist/**/*"],
  },
  {
    languageOptions: {
      parserOptions: {
        project: "./tsconfig.eslint.json",
        projectService: true,
        tsconfigRootDir: import.meta.dirname,
      },
    },
    rules: {
      "no-shadow": [
        "error",
        {
          builtinGlobals: true,
          hoist: "functions",
          allow: ["name"],
          ignoreOnInitialization: false,
        },
      ],
      "no-unneeded-ternary": ["error", { defaultAssignment: false }],
      "no-unreachable-loop": "error",
      "no-unused-expressions": [
        "error",
        {
          allowShortCircuit: false,
          allowTernary: false,
          allowTaggedTemplates: false,
          enforceForJSX: true,
        },
      ],
      "no-unused-vars": [
        "error",
        {
          argsIgnorePattern: "^_",
          ignoreRestSiblings: true,
          varsIgnorePattern: "^_",
        },
      ],
    },
  },
  {
    files: ["**/*.astro"],
    plugins: {
      eslintPluginAstro,
    },
    languageOptions: {
      parser: astroParser,
      parserOptions: {
        parser: tsParser,
        extraFileExtensions: [".astro"],
        sourceType: "module",
      },
    },
    rules: {
      "consistent-return": "off",
    },
  },
  {
    files: ["**/*.astro", "**/*.ts", "**/*.tsx"],
    rules: {
      "@typescript-eslint/consistent-type-definitions": ["error", "type"],
      "@typescript-eslint/consistent-type-imports": [
        "error",
        {
          prefer: "type-imports",
          fixStyle: "inline-type-imports",
          disallowTypeAnnotations: true,
        },
      ],
      "@typescript-eslint/no-import-type-side-effects": "error",
      "@typescript-eslint/no-non-null-asserted-nullish-coalescing": "error",
      "@typescript-eslint/no-non-null-assertion": "error",
      /**
       * Typescript extension rules -- Core rules need to be disabled.
       */
      "no-shadow": "off",
      "@typescript-eslint/no-shadow": [
        "error",
        {
          builtinGlobals: true,
          hoist: "functions",
          allow: ["name"],
          ignoreOnInitialization: false,
        },
      ],
      "no-unused-expressions": "off",
      "@typescript-eslint/no-unused-expressions": [
        "error",
        {
          allowShortCircuit: false,
          allowTernary: false,
          allowTaggedTemplates: false,
          enforceForJSX: true,
        },
      ],
      "no-unused-vars": "off",
      "@typescript-eslint/no-unused-vars": [
        "error",
        {
          argsIgnorePattern: "^_",
          ignoreRestSiblings: true,
          varsIgnorePattern: "^_",
        },
      ],
    },
  },
);