eslint · nzakas · May 28, 2025 · May 6, 2025 · May 13, 2025 · May 13, 2025
@@ -155,11 +155,17 @@ async function loadTypeScriptConfigFileWithJiti(filePath, fileURL, mtime) {
 	 * Disabling `moduleCache` allows us to reload a
 	 * config file when the last modified timestamp changes.
 	 */
-
-	const jiti = createJiti(__filename, {
+	const jitiOptions = {
 		moduleCache: false,
-		interopDefault: false,
-	});
+	};
+
+	// eslint-disable-next-line no-use-before-define -- `ConfigLoader.getJitiVersion` can be overwritten for testing
+	const jitiVersion = ConfigLoader.getJitiVersion();
+	if (jitiVersion.startsWith("2.1.")) {
+		jitiOptions.interopDefault = false;
+	}
+
+	const jiti = createJiti(__filename, jitiOptions);
 	const config = await jiti.import(fileURL.href);
 
 	importedConfigFileModificationTime.set(filePath, mtime);
@@ -501,6 +507,14 @@ class ConfigLoader {
 		return import("jiti");
 	}
 
+	/**
+	 * Used to get the jiti version. This method is exposed internally for testing purposes.
+	 * @returns {string} The version of jiti.
+	 */
+	static getJitiVersion() {
+		return require("jiti/package.json").version;
+	}
+
 	/**
 	 * Determines which config file to use. This is determined by seeing if an
 	 * override config file was specified, and if so, using it; otherwise, as long

@@ -175,7 +175,9 @@
     "globals": "^15.0.0",
     "got": "^11.8.3",
     "gray-matter": "^4.0.3",
-    "jiti": "^2.1.0",
+    "jiti": "^2.2.0",
+    "jiti-v2.0": "npm:jiti@2.0.x",
+    "jiti-v2.1": "npm:jiti@2.1.x",
     "knip": "^5.32.0",
     "lint-staged": "^11.0.0",
     "load-perf": "^0.2.0",