diff --git a/packages/reactivity/src/effect.ts b/packages/reactivity/src/effect.ts
index 5c926f7..c7f39ac 100644
--- a/packages/reactivity/src/effect.ts
+++ b/packages/reactivity/src/effect.ts
@@ -13,9 +13,15 @@ type KeyToDepMap = Map<any, Dep>
  */
 const targetMap = new WeakMap<any, KeyToDepMap>()
 
-export function effect<T = any>(fn: () => T) {
+export interface ReactiveEffectOptions {
+  lazy?: boolean
+  schedler?: EffectScheduler
+}
+export function effect<T = any>(fn: () => T, options?: ReactiveEffectOptions) {
   const _effect = new ReactiveEffect(fn)
-  _effect.run()
+  if (!options || !options.lazy) {
+    _effect.run()
+  }
 }
 
 export let activeEffect: ReactiveEffect | undefined
diff --git a/packages/vue/examples/reactivity/lazy.html b/packages/vue/examples/reactivity/lazy.html
new file mode 100644
index 0000000..13e5a54
--- /dev/null
+++ b/packages/vue/examples/reactivity/lazy.html
@@ -0,0 +1,28 @@
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>Document</title>
+    <script src="../../dist/vue.js"></script>
+</head>
+<body>
+<div id="app"></div>
+</body>
+<script>
+    const { reactive,effect } = Vue
+    const obj=reactive({
+       count:1
+    })
+    let {name}=obj
+    console.log('name',name);
+    
+    effect(()=>{
+        document.querySelector('#app').innerText=name
+    })
+    setTimeout(()=>{
+        obj.name='李四'
+        
+    console.log('obj',obj);
+    },2000)
+</script>
+</html>
\ No newline at end of file
