diff --git a/index.js b/index.js
index 3805fa5..cb833fd 100644
--- a/index.js
+++ b/index.js
@@ -1,22 +1,30 @@
 import { reactive } from "vue";
 
 class Wait {
-  list = reactive({});
-  is = (name) => !!this.list[name];
-  start = (name) => !this.list[name] && (this.list[name] = Date.now());
-  end = (name) => {
+  constructor() {
+    this.list = reactive({});
+  }
+  is(name) {
+    return !!this.list[name];
+  }
+  start(name) {
+    return !this.list[name] && (this.list[name] = Date.now());
+  }
+  end(name) {
     const start = this.list[name];
     delete this.list[name];
     return Date.now() - start;
-  };
-  any = () => Object.keys(this.list).length;
-  clear = () => {
+  }
+  any() {
+    return Object.keys(this.list).length;
+  }
+  clear() {
     let clearList = {};
     Object.keys(this.list).forEach((item) => {
       clearList[item] = this.end(item);
     });
     return clearList;
-  };
+  }
 }
 
 export const $wait = new Wait();
diff --git a/package.json b/package.json
index 156bfa3..04f6dc1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@meforma/vue-wait-for",
-  "version": "0.0.1",
+  "version": "0.0.2",
   "description": "A loader manager for vuejs 3 with reactive method",
   "main": "index.js",
   "scripts": {