From ceb435509138b761270a24308a5e72587ec05be7 Mon Sep 17 00:00:00 2001
From: cindylugd <1031096430@qq.com>
Date: Sat, 2 Mar 2019 15:01:00 +0800
Subject: [PATCH 1/2] commit index.js

---
 lib/index.js | 49 ++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 46 insertions(+), 3 deletions(-)

diff --git a/lib/index.js b/lib/index.js
index 8d2deb0..d824a9e 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -1,16 +1,59 @@
 !function (root, doc) {
 
   class Delegator {
-    constructor (selector/* root选择器 */) {
+    constructor(selector/* root选择器 */) {
       // TODO
+      this.root = doc.querySelector(selector);
+      this.delegatorEventList = {};
+      this.delegator = function delegator(e) {
+        
+        let en = e || window.event;
+        // e.target是当前执行者，e.currentTarget是事件监听者，兼容IE浏览器
+        let target = en.target || en.srcElement;
+        // e.type是绑定的事件名称，获取相同事件名称的被委托的事件列表
+        let targetEventList = this.delegatorEventList[en.type];
+        // 循环判断当前节点是否是事件监听者节点，如果是则触发绑定的事件函数
+        while (target !== en.currentTarget)
+          targetEventList.forEach(event => {
+            if (target.matches(event.selector)) {
+              event.fn.call(target, en);
+            }
+          }); {
+          target = target.parentNode;
+        }
+      }
     }
 
-    on (event/* 绑定事件 */, selector/* 触发事件节点对应选择器 */, fn/* 出发函数 */) {
+    on(event/* 绑定事件 */, selector/* 触发事件节点对应选择器 */, fn/* 触发函数 */) {
       // TODO
+      // 判断是否有和传入的事件名称相对应的委托事件列表，
+      // 如果有则把传入的选择器和函数加入到列表中，相反则初始化一个数组并把选择器和函数加入进来
+      // 之所以用数组是因为一个父元素会包含各种子元素，所有的子元素事件都绑定在一个父元素上，
+      // 不同的子元素对应的选择器和要触发的执行函数会不一样
+      if (this.delegatorEventList[event]) {
+        this.delegatorEventList[event].push({
+          matches: selector,
+          fn: fn
+        });
+      } else {
+        this.delegatorEventList[event] = [{
+          matches: selector,
+          fn: fn
+        }];
+      }
+      if (doc.addEventListener) {
+        this.root.addEventListener(event, this.delegator);
+      } else {
+        this.root.attachEvent("on" + event, this.delegator);
+      }
+      return this;
     }
 
-    destroy () {
+    destroy() {
       // TODO
+      Object.keys(this.delegatorEventList).map(eventName => {
+        this.root.removeEventListener(eventName, this.delegator)
+      });
     }
   }
 

From 88732729f88c02f63b094f88acf62b63bdccc444 Mon Sep 17 00:00:00 2001
From: cindylugd <1031096430@qq.com>
Date: Sat, 2 Mar 2019 15:12:06 +0800
Subject: [PATCH 2/2] test

---
 lib/index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/index.js b/lib/index.js
index d824a9e..8f3a644 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -1,5 +1,5 @@
 !function (root, doc) {
-
+//test
   class Delegator {
     constructor(selector/* root选择器 */) {
       // TODO