From 73ca3e0cc292221ff59333ba161b0485247b160a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9C=B4=E9=87=8E=E5=BD=92=E8=B8=AA?= <nemoro1928@163.com>
Date: Fri, 16 Nov 2018 01:07:55 +0800
Subject: [PATCH 1/2] emmm...

---
 lib/index.js | 35 +++++++++++++++++++++++++++++++++--
 1 file changed, 33 insertions(+), 2 deletions(-)

diff --git a/lib/index.js b/lib/index.js
index 8d2deb0..4a11aaf 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -3,16 +3,47 @@
   class Delegator {
     constructor (selector/* root选择器 */) {
       // TODO
+      this.stack = [];
+      this.root  = document.querySelector(selector);
+      this.delegate = null;
     }
 
     on (event/* 绑定事件 */, selector/* 触发事件节点对应选择器 */, fn/* 出发函数 */) {
       // TODO
+      this.stack.push(fn)
+
+      // 链式调用时，移除先前的on传入的出发函数
+      if ( this.delegate != null ){
+        this.root.removeEventListener(event, this.delegate)
+      }
+      // 查出满足selector的dom
+      this.delegate = (e) => {
+        var i = 0;
+        while (i < e.path.length) {
+          if(e.path[i].matches(selector)){
+            // 后进先出
+            this.stack.reverse().forEach(fn => {
+              fn.call(e.path[i], e)
+            });
+            return 0;
+          }
+          i++;
+        }
+      }
+      this.root.addEventListener(event, this.delegate)
+      return this;
     }
 
     destroy () {
       // TODO
+      this.root.removeEventListener(event, this.delegate);
+      this.delegate = null;
+      this.stack = []
     }
-  }
+  } 
 
   root.Delegator = Delegator
-}(window, document)
\ No newline at end of file
+}(window, document)
+
+
+ 
\ No newline at end of file

From 567e60e87ad4aa97c92fd9568f6ff1d597529741 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9C=B4=E9=87=8E=E5=BD=92=E8=B8=AA?= <2472906920@qq.com>
Date: Fri, 16 Nov 2018 18:34:22 +0800
Subject: [PATCH 2/2] =?UTF-8?q?=E8=AF=AF=E4=BC=9A=E4=BA=86=E9=93=BE?=
 =?UTF-8?q?=E5=BC=8F=E8=B0=83=E7=94=A8=E7=9A=84=E6=84=8F=E6=80=9D?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 lib/index.js | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/lib/index.js b/lib/index.js
index 4a11aaf..98bd4a4 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -3,13 +3,16 @@
   class Delegator {
     constructor (selector/* root选择器 */) {
       // TODO
-      this.stack = [];
+      this.stack = {};
       this.root  = document.querySelector(selector);
       this.delegate = null;
     }
 
     on (event/* 绑定事件 */, selector/* 触发事件节点对应选择器 */, fn/* 出发函数 */) {
       // TODO
+      if(this.stack[selector] === undefined)
+        this.stack[selector] = [];
+
       this.stack.push(fn)
 
       // 链式调用时，移除先前的on传入的出发函数
@@ -20,12 +23,12 @@
       this.delegate = (e) => {
         var i = 0;
         while (i < e.path.length) {
-          if(e.path[i].matches(selector)){
-            // 后进先出
-            this.stack.reverse().forEach(fn => {
-              fn.call(e.path[i], e)
-            });
-            return 0;
+          for(let sel in this.stack){
+            if(e.path[i].matches(sel)){
+              this.stack[sel].forEach(fn => {
+                fn.call(e.path[i], e)
+              });
+            }
           }
           i++;
         }
@@ -38,7 +41,7 @@
       // TODO
       this.root.removeEventListener(event, this.delegate);
       this.delegate = null;
-      this.stack = []
+      this.stack = {}
     }
   }