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eslint.config.js

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+import { fileURLToPath } from "node:url";
+import { includeIgnoreFile } from "@eslint/compat";
+import js from "@eslint/js";
+import svelte from "eslint-plugin-svelte";
+import { defineConfig } from "eslint/config";
+import globals from "globals";
+import ts from "typescript-eslint";
+import svelteConfig from "./svelte.config.js";
+
+const gitignorePath = fileURLToPath(new URL("./.gitignore", import.meta.url));
+
+export default defineConfig(
+  includeIgnoreFile(gitignorePath),
+  js.configs.recommended,
+  ...ts.configs.recommended,
+  ...svelte.configs.recommended,
+  {
+    languageOptions: {
+      globals: { ...globals.browser, ...globals.node },
+    },
+    rules: { // typescript-eslint strongly recommend that you do not use the no-undef lint rule on TypeScript projects.
+      // see: https://typescript-eslint.io/troubleshooting/faqs/eslint/#i-get-errors-from-the-no-undef-rule-about-global-variables-not-being-defined-even-though-there-are-no-typescript-errors
+      "no-undef": "off",
+    },
+  },
+  {
+    files: [
+      "**/*.svelte",
+      "**/*.svelte.ts",
+      "**/*.svelte.js",
+    ],
+    languageOptions: {
+      parserOptions: {
+        projectService: true,
+        extraFileExtensions: [".svelte"],
+        parser: ts.parser,
+        svelteConfig,
+      },
+    },
+  },
+);