eslint.config.mjs

import typescriptEslint from "@typescript-eslint/eslint-plugin"
import globals from "globals"
import tsParser from "@typescript-eslint/parser"
import parser from "svelte-eslint-parser"
import path from "node:path"
import { fileURLToPath } from "node:url"
import js from "@eslint/js"
import { FlatCompat } from "@eslint/eslintrc"

const __filename = fileURLToPath(import.meta.url)
const __dirname = path.dirname(__filename)
const compat = new FlatCompat({
  baseDirectory: __dirname,
  recommendedConfig: js.configs.recommended,
  allConfig: js.configs.all
})

export default [
  {
    ignores: [
      "**/.DS_Store",
      "**/node_modules",
      "build",
      ".svelte-kit",
      "package",
      "**/.env",
      "**/.env.*",
      "!**/.env.example",
      "**/pnpm-lock.yaml",
      "**/package-lock.json",
      "**/yarn.lock"
    ]
  },
  ...compat.extends(
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:svelte/recommended",
    "prettier"
  ),
  {
    plugins: {
      "@typescript-eslint": typescriptEslint
    },

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

      parser: tsParser,
      ecmaVersion: 2020,
      sourceType: "module",

      parserOptions: {
        extraFileExtensions: [".svelte"]
      }
    },

    rules: {
      "svelte/no-unused-svelte-ignore": "off",
      "svelte/no-at-html-tags": "warn",
      "no-useless-escape": "warn",
      "no-undef": "warn"
    }
  },
  {
    files: ["**/*.svelte"],

    languageOptions: {
      parser: parser,
      ecmaVersion: 5,
      sourceType: "script",

      parserOptions: {
        parser: "@typescript-eslint/parser"
      }
    }
  }
]