From cc95387e4b47a5f51f6e64ebe1c3ab1f22f3640a Mon Sep 17 00:00:00 2001
From: ruanyf <yifeng.ruan@gmail.com>
Date: Thu, 21 Feb 2019 16:53:41 +0800
Subject: [PATCH] docs(class-extends): fix mixin #820

---
 docs/class-extends.md | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/docs/class-extends.md b/docs/class-extends.md
index 6d7c751..5d112c4 100644
--- a/docs/class-extends.md
+++ b/docs/class-extends.md
@@ -688,11 +688,17 @@ const c = {...a, ...b}; // {a: 'a', b: 'b'}
 
 ```javascript
 function mix(...mixins) {
-  class Mix {}
+  class Mix {
+    constructor() {
+      for (let mixin of mixins) {
+        copyProperties(this, new mixin()); // 拷贝实例属性
+      }
+    }
+  }
 
   for (let mixin of mixins) {
-    copyProperties(Mix.prototype, mixin); // 拷贝实例属性
-    copyProperties(Mix.prototype, Reflect.getPrototypeOf(mixin)); // 拷贝原型属性
+    copyProperties(Mix, mixin); // 拷贝静态属性
+    copyProperties(Mix.prototype, mixin.prototype); // 拷贝原型属性
   }
 
   return Mix;
@@ -700,9 +706,9 @@ function mix(...mixins) {
 
 function copyProperties(target, source) {
   for (let key of Reflect.ownKeys(source)) {
-    if ( key !== "constructor"
-      && key !== "prototype"
-      && key !== "name"
+    if ( key !== 'constructor'
+      && key !== 'prototype'
+      && key !== 'name'
     ) {
       let desc = Object.getOwnPropertyDescriptor(source, key);
       Object.defineProperty(target, key, desc);