diff --git a/js/防抖.js b/js/防抖.js
index a85e191..03d0561 100644
--- a/js/防抖.js
+++ b/js/防抖.js
@@ -23,12 +23,19 @@ export default function  deBounce(fun, delay) {
  */
 export default function  deBounce(fun, delay) {
   var timer = 0
-  return function() {
+  var flag = true // 是否允许执行
+  return function(){
     var args = arguments
     var context = this
-    if(timer) clearTimeout(timer)
+    if(flag) {
+      fun.apply(context, args)
+      flag = false
+      return
+    } 
+    clearTimeout(timer)
     timer = setTimeout(function(){
       fun.apply(context, args)
-    })
+      flag = true
+    },delay)
   }
 }