From 39e7447e704c43f08a7b2994acbec9d4ad8c2264 Mon Sep 17 00:00:00 2001
From: bunny <1319900154@qq.com>
Date: Thu, 19 Jun 2025 07:25:00 +0800
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20Vue2=20Mixins=20=E6=B7=B7=E5=85=A5?=
 =?UTF-8?q?=E6=9C=BA=E5=88=B6=E8=AF=A6=E8=A7=A3?=
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---
 vue2-tutorials/single-file/demo2/package.json |   2 +-
 vue2-tutorials/single-file/demo2/src/App.vue  |   5 +-
 vue2-tutorials/single-file/demo2/src/main.js  |  13 +-
 .../views/demo3/Vue2 Mixins 混入机制详解.md   | 173 ++++++++++++++++++
 .../src/views/demo3/components/SchoolInfo.vue |  23 +++
 .../demo2/src/views/demo3/index.vue           |  14 ++
 .../demo2/src/views/demo3/mixins/test1.js     |  12 ++
 7 files changed, 233 insertions(+), 9 deletions(-)
 create mode 100644 vue2-tutorials/single-file/demo2/src/views/demo3/Vue2 Mixins 混入机制详解.md
 create mode 100644 vue2-tutorials/single-file/demo2/src/views/demo3/components/SchoolInfo.vue
 create mode 100644 vue2-tutorials/single-file/demo2/src/views/demo3/index.vue
 create mode 100644 vue2-tutorials/single-file/demo2/src/views/demo3/mixins/test1.js

diff --git a/vue2-tutorials/single-file/demo2/package.json b/vue2-tutorials/single-file/demo2/package.json
index efc0f1a..5a2e6e7 100644
--- a/vue2-tutorials/single-file/demo2/package.json
+++ b/vue2-tutorials/single-file/demo2/package.json
@@ -41,4 +41,4 @@
     "not dead"
   ],
   "packageManager": "pnpm@10.8.1+sha512.c50088ba998c67b8ca8c99df8a5e02fd2ae2e2b29aaf238feaa9e124248d3f48f9fb6db2424949ff901cffbb5e0f0cc1ad6aedb602cd29450751d11c35023677"
-}
+}
\ No newline at end of file
diff --git a/vue2-tutorials/single-file/demo2/src/App.vue b/vue2-tutorials/single-file/demo2/src/App.vue
index 5371a20..31109f7 100644
--- a/vue2-tutorials/single-file/demo2/src/App.vue
+++ b/vue2-tutorials/single-file/demo2/src/App.vue
@@ -3,15 +3,18 @@
     <Demo1 />
     <hr />
     <Demo2 />
+    <hr />
+    <Demo3 />
   </div>
 </template>
 
 <script>
 import Demo1 from "@/views/demo1/index.vue";
 import Demo2 from "@/views/demo2/index.vue";
+import Demo3 from "@/views/demo3/index.vue";
 
 export default {
   name: "App",
-  components: { Demo1, Demo2 },
+  components: { Demo1, Demo2, Demo3 },
 };
 </script>
diff --git a/vue2-tutorials/single-file/demo2/src/main.js b/vue2-tutorials/single-file/demo2/src/main.js
index d74624b..74f1ec5 100644
--- a/vue2-tutorials/single-file/demo2/src/main.js
+++ b/vue2-tutorials/single-file/demo2/src/main.js
@@ -1,9 +1,8 @@
-import Vue from 'vue'
-import App from './App.vue'
+import Vue from "vue";
+import App from "./App.vue";
 
-Vue.config.productionTip = false
+Vue.config.productionTip = false;
 
-new Vue({ 
-  render: h => h(App),
-})
-.$mount('#app')
+new Vue({
+  render: (h) => h(App),
+}).$mount("#app");
diff --git a/vue2-tutorials/single-file/demo2/src/views/demo3/Vue2 Mixins 混入机制详解.md b/vue2-tutorials/single-file/demo2/src/views/demo3/Vue2 Mixins 混入机制详解.md
new file mode 100644
index 0000000..d907e20
--- /dev/null
+++ b/vue2-tutorials/single-file/demo2/src/views/demo3/Vue2 Mixins 混入机制详解.md	
@@ -0,0 +1,173 @@
+# Vue2 Mixins 混入机制详解
+
+## 一、基本概念
+
+Mixins（混入）是 Vue2 中用于分发组件可复用功能的灵活方式。一个混入对象可以包含任意组件选项，当组件使用混入对象时，所有混入对象的选项将被"混合"进入组件本身的选项。
+
+## 二、代码示例解析
+
+### 1. 混入对象定义 (test1.js)
+```javascript
+export const test1 = {
+  data() {
+    return {
+      username: "Bunny"  // 将被合并到组件data中
+    };
+  },
+  methods: {
+    showMessage() {  // 将被合并到组件methods中
+      alert(`展示消息：${this.username}`);
+    }
+  }
+};
+```
+
+### 2. 组件中使用混入 (SchoolInfo.vue)
+```html
+<template>
+  <div>
+    <h2 @click="showMessage">学生姓名-showMessage：{{ username }}</h2>
+    <h2>学习性别：{{ sex }}</h2>
+    <h2>学生年龄：{{ age + 1 }}</h2>
+  </div>
+</template>
+
+<script>
+import { test1 } from "../mixins/test1";
+
+export default {
+  name: "SchoolInfo",
+  mixins: [test1],  // 注册混入
+  data() {
+    return {
+      username: "Bunny",  // 与混入data合并
+      sex: "🚺",
+      age: 16
+    };
+  }
+};
+</script>
+```
+
+## 三、合并策略详解
+
+### 1. 选项合并规则
+| 选项类型     | 合并策略               | 示例结果                     |
+| ------------ | ---------------------- | ---------------------------- |
+| data         | 递归合并，组件优先     | 同名属性以组件为准           |
+| methods      | 合并，组件优先         | 同名方法覆盖                 |
+| 生命周期钩子 | 合并为数组，混入先执行 | 都会调用，顺序: mixin → 组件 |
+| 其他对象值   | 组件优先               | 如components, directives等   |
+
+### 2. 合并过程示例
+```javascript
+// 混入data
+{ username: "Bunny" }
+
+// 组件data
+{ 
+  username: "Bunny",  // 同名属性被保留
+  sex: "🚺",
+  age: 16 
+}
+
+// 最终合并结果
+{
+  username: "Bunny",  // 来自组件
+  sex: "🚺",         // 来自组件
+  age: 16            // 来自组件
+}
+```
+
+## 四、最佳实践
+
+### 1. 命名规范
+- 混入文件使用 `mixin-` 前缀（如 `mixin-logger.js`）
+- 混入变量使用 `mixin` 后缀（如 `userMixin`）
+- 避免与组件属性和方法重名
+
+### 2. 使用建议
+- **适合场景**：
+  - 多个组件共享相同逻辑
+  - 功能模块解耦
+  - 插件开发
+  
+- **避免场景**：
+  - 过度使用导致代码难以追踪
+  - 复杂的多层级混入
+
+### 3. 全局混入
+```javascript
+// 谨慎使用！会影响所有Vue实例
+Vue.mixin({
+  created() {
+    console.log('全局混入的created钩子');
+  }
+});
+```
+
+## 五、高级用法
+
+### 1. 自定义合并策略
+```javascript
+Vue.config.optionMergeStrategies.myOption = (parent, child, vm) => {
+  return child || parent;
+};
+```
+
+### 2. 混入组合
+```javascript
+// featureMixin.js
+export const featureMixin = {
+  methods: {
+    featureMethod() { /*...*/ }
+  }
+};
+
+// 组件中使用多个混入
+import { userMixin, featureMixin } from './mixins';
+export default {
+  mixins: [userMixin, featureMixin]
+}
+```
+
+### 3. 混入与插件结合
+```javascript
+// plugin.js
+export default {
+  install(Vue) {
+    Vue.mixin({
+      mounted() {
+        console.log('来自插件的混入');
+      }
+    });
+  }
+};
+```
+
+## 六、常见问题
+
+1. **属性冲突**：
+   - 数据对象：组件data优先
+   - 方法：组件methods优先
+   - 钩子函数：都会执行，混入的先执行
+
+2. **调试技巧**：
+   ```javascript
+   mounted() {
+     console.log(this.$options); // 查看合并后的选项
+   }
+   ```
+
+3. **与Vue3的区别**：
+   - Vue3 使用 Composition API 替代混入
+   - 提供 `setup` 函数更好地组织逻辑
+
+## 七、替代方案比较
+
+| 方案            | 优点           | 缺点             |
+| --------------- | -------------- | ---------------- |
+| Mixins          | 逻辑复用简单   | 命名冲突风险     |
+| 高阶组件        | 明确props传递  | 组件嵌套层次深   |
+| 插件            | 全局功能扩展   | 过度使用影响性能 |
+| Composition API | 更好的代码组织 | 仅Vue3支持       |
diff --git a/vue2-tutorials/single-file/demo2/src/views/demo3/components/SchoolInfo.vue b/vue2-tutorials/single-file/demo2/src/views/demo3/components/SchoolInfo.vue
new file mode 100644
index 0000000..0c96ed4
--- /dev/null
+++ b/vue2-tutorials/single-file/demo2/src/views/demo3/components/SchoolInfo.vue
@@ -0,0 +1,23 @@
+<template>
+  <div>
+    <h2 @click="showMessage">学生姓名-showMessage：{{ username }}</h2>
+    <h2>学习性别：{{ sex }}</h2>
+    <h2>学生年龄：{{ age + 1 }}</h2>
+  </div>
+</template>
+
+<script>
+import { test1 } from "../mixins/test1";
+
+export default {
+  name: "SchoolInfo",
+  data() {
+    return {
+      username: "Bunny",
+      sex: "🚺",
+      age: 16,
+    };
+  },
+  mixins: [test1],
+};
+</script>
diff --git a/vue2-tutorials/single-file/demo2/src/views/demo3/index.vue b/vue2-tutorials/single-file/demo2/src/views/demo3/index.vue
new file mode 100644
index 0000000..e59dea5
--- /dev/null
+++ b/vue2-tutorials/single-file/demo2/src/views/demo3/index.vue
@@ -0,0 +1,14 @@
+<template>
+  <div>
+    <SchoolInfo />
+  </div>
+</template>
+
+<script>
+import SchoolInfo from "./components/SchoolInfo.vue";
+
+export default {
+  name: "Demo-3",
+  components: { SchoolInfo },
+};
+</script>
diff --git a/vue2-tutorials/single-file/demo2/src/views/demo3/mixins/test1.js b/vue2-tutorials/single-file/demo2/src/views/demo3/mixins/test1.js
new file mode 100644
index 0000000..edd12bb
--- /dev/null
+++ b/vue2-tutorials/single-file/demo2/src/views/demo3/mixins/test1.js
@@ -0,0 +1,12 @@
+export const test1 = {
+  data() {
+    return {
+      username: "Bunny",
+    };
+  },
+  methods: {
+    showMessage() {
+      alert(`展示消息：${this.username}`);
+    },
+  },
+};