diff --git a/package-lock.json b/package-lock.json
deleted file mode 100644
index 15150bd..0000000
--- a/package-lock.json
+++ /dev/null
@@ -1,13 +0,0 @@
-{
-  "name": "ddmt-tool",
-  "version": "1.0.7",
-  "lockfileVersion": 3,
-  "requires": true,
-  "packages": {
-    "": {
-      "name": "ddmt-tool",
-      "version": "1.0.7",
-      "license": "MIT"
-    }
-  }
-}
diff --git a/package.json b/package.json
index 1affa2f..21018ee 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
   "description": "A utility library that provides commonly used functions to simplify everyday development tasks. Whether it's string manipulation, array operations, or other frequent functionalities, `ddmt-tool` helps you work more efficiently.",
   "main": "index.js",
   "type": "module",
+  "types": "types/index.d.ts",
   "scripts": {
     "dev": "node index.js"
   },
diff --git a/types/index.d.ts b/types/index.d.ts
new file mode 100644
index 0000000..2aa74aa
--- /dev/null
+++ b/types/index.d.ts
@@ -0,0 +1,8 @@
+declare module 'ddmt-tool' {
+    export function animateStart(event: HTMLElement, className: string, forceExecute?: boolean): void;
+
+    export function randomNum(minNum: number): number;
+    export function randomNum(minNum: number, maxNum: number): number;
+
+    export function nextArray(arr: any[], index: number): any[];
+}
\ No newline at end of file