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diff --git a/src/views/demo/constructor/constructor.md b/src/views/demo/constructor/constructor.md
new file mode 100644
index 0000000..4bffd5c
--- /dev/null
+++ b/src/views/demo/constructor/constructor.md
@@ -0,0 +1,143 @@
+## constructor 属性的详细解释
+
+### 基本概念
+
+**constructor** 是原型对象上的一个属性，它指向创建当前实例对象的构造函数。
+
+### 各层级的 constructor 指向
+
+```
+Person.prototype.constructor → Person
+Function.prototype.constructor → Function
+Object.prototype.constructor → Object
+```
+
+### 实际示例
+
+```javascript
+function Person(name) {
+    this.name = name;
+}
+
+const p1 = new Person("张三");
+
+// 验证 constructor 指向
+console.log(p1.constructor === Person);           // true
+console.log(Person.prototype.constructor === Person); // true
+console.log(Function.prototype.constructor === Function); // true
+console.log(Object.prototype.constructor === Object); // true
+```
+
+### 完整的 constructor 链式关系
+
+```
+p1.constructor → Person.prototype.constructor → Person
+
+Person.constructor → Function.prototype.constructor → Function
+
+Function.constructor → Function.prototype.constructor → Function
+  (Function 的构造函数是它自身)
+
+Object.constructor → Function.prototype.constructor → Function
+  (Object 的构造函数是 Function)
+```
+
+### constructor 属性的工作原理
+
+1. **原型继承机制**：
+   ```javascript
+   // 当访问 p1.constructor 时：
+   // 1. p1 对象本身没有 constructor 属性
+   // 2. 沿着原型链查找：p1.__proto__ → Person.prototype
+   // 3. 在 Person.prototype 上找到 constructor 属性
+   // 4. 该 constructor 指向 Person 函数
+   ```
+
+2. **constructor 的重写**：
+   ```javascript
+   function Person() {}
+   
+   // 默认情况下
+   console.log(Person.prototype.constructor === Person); // true
+   
+   // 如果重写 prototype
+   Person.prototype = {
+       // 必须手动指定 constructor，否则会丢失
+       constructor: Person,
+       sayHello: function() {}
+   };
+   
+   // 如果不手动指定 constructor
+   Person.prototype = {
+       sayHello: function() {}
+   };
+   console.log(Person.prototype.constructor === Person); // false
+   console.log(Person.prototype.constructor === Object); // true
+   ```
+
+### 实际应用场景
+
+1. **类型判断**：
+   ```javascript
+   const arr = [];
+   console.log(arr.constructor === Array); // true
+   
+   const obj = {};
+   console.log(obj.constructor === Object); // true
+   
+   const num = 123;
+   console.log(num.constructor === Number); // true
+   ```
+
+2. **实例创建**：
+   ```javascript
+   function Person(name) {
+       this.name = name;
+   }
+   
+   const p1 = new Person("张三");
+   
+   // 通过 constructor 创建新实例
+   const p2 = new p1.constructor("李四");
+   console.log(p2.name); // "李四"
+   console.log(p2 instanceof Person); // true
+   ```
+
+3. **原型链中的 constructor**：
+   ```javascript
+   function Animal() {}
+   function Dog() {}
+   
+   // 设置继承关系
+   Dog.prototype = Object.create(Animal.prototype);
+   
+   // 修复 constructor 指向
+   Dog.prototype.constructor = Dog;
+   
+   const dog = new Dog();
+   console.log(dog.constructor === Dog); // true
+   console.log(dog instanceof Dog);      // true
+   console.log(dog instanceof Animal);   // true
+   ```
+
+### 总结要点
+
+1. **constructor 的位置**：在原型对象上，不在实例对象上
+2. **默认指向**：指向创建该原型对象的构造函数
+3. **可修改性**：constructor 属性可以被修改或覆盖
+4. **查找路径**：实例对象访问 constructor 时会沿着原型链查找
+5. **特殊案例**：
+   - `Function.prototype.constructor` 指向 `Function`
+   - `Object.prototype.constructor` 指向 `Object`
+   - 函数对象的构造函数是 `Function`
+   - 对象实例的构造函数是创建它的函数
+
+### 内存示意图
+```
+p1 (实例)                  Person.prototype          Function.prototype
+┌─────────┐                ┌─────────────────┐        ┌─────────────────┐
+│         │ __proto__ →    │ constructor     │ → Person               │
+│         ├──────────────→ │                 │        │ constructor     │ → Function
+│         │                │ other props...  │        │                 │
+└─────────┘                └─────────────────┘        └─────────────────┘
+```
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diff --git a/src/views/demo/constructor/index.vue b/src/views/demo/constructor/index.vue
new file mode 100644
index 0000000..99d9191
--- /dev/null
+++ b/src/views/demo/constructor/index.vue
@@ -0,0 +1,18 @@
+<template>
+    <div
+        class="markdown-body"
+        v-html="htmlStr"
+    />
+</template>
+
+<script setup>
+import { ref } from 'vue';
+import { marked } from 'marked';
+import { getMarkdownContent } from '@/utils/tools';
+
+const htmlStr = ref('');
+
+getMarkdownContent('./md/constructor.md').then((res) => {
+    htmlStr.value = marked(res);
+});
+</script>
diff --git a/src/views/demo/prototype/prototype.md b/src/views/demo/prototype/prototype.md
index ac4e321..990fc59 100644
--- a/src/views/demo/prototype/prototype.md
+++ b/src/views/demo/prototype/prototype.md
@@ -1 +1,88 @@
-## 测试
\ No newline at end of file
+## 代码前置条件
+```javascript
+function Person(name) {
+    this.name = name;
+}
+
+const p1 = new Person('p1');
+```
+
+## constructor的详细理解
+[constructor的详细理解](/#/demo/constructor)
+
+## 原型链流转图
+```javascript
+/**
+ * __proto__：原型引用
+ * prototype：原型对象
+ * 每个实例对象都有__proto__，它指向构造函数的prototype
+ */
+
+// p1的完整原型链
+p1.__proto__ === Person.prototype
+Person.prototype.__proto__ === Object.prototype
+Object.prototype.__proto__ === null
+
+// Person的完整原型链
+Person.__proto__ === Function.prototype
+Function.prototype.__proto__ === Object.prototype
+Object.prototype.__proto__ === null
+
+// Function的完整原型链（注意：Function.__proto__与Function.prototype循环相等，这里是循环引用，差异点）
+Function.__proto__ === Function.prototype
+Function.prototype.__proto__ === Object.prototype
+Object.prototype.__proto__ === null
+
+/**
+ * Object的完整原型链
+ * Object.__proto__之所以等于Function.prototype，是因为Object本身是一个构造函数，所有的构造函数最终都指向Function.prototype
+ * 那为什么Function.prototype.__proto__指向Object.prototype，因为Function.prototype是对象，所有的对象最终都指向Obnect.prototype
+ * 如果这里用Function.__proto__,那它指向的就是Function.prototyp，因为Function是构造函数，所以符合上面所说的所有的构造函数最终都指向Function.prototype，这里就形成了循环引用
+ */
+Object.__proto__ === Function.prototype
+Function.prototype.__proto__ === Object.prototype
+Object.prototype.__proto__ === null
+
+//Object.prototype的完整原型链
+Object.prototype.__proto__ === null
+```
+
+## 原型与原型链md关系图
+```markdown
+p1 
+├── __proto__ → Person.prototype 
+    └── __proto__ → Object.prototype 
+        └── __proto__ → null 
+        
+Person 
+├── __proto__ → Function.prototype 
+    └── __proto__ → Object.prototype 
+        └── __proto__ → null
+
+Function 
+├── __proto__ → Function.prototype 
+    └── __proto__ → Object.prototype 
+        └── __proto__ → null 
+        
+Object 
+├── __proto__ → Function.prototype 
+    └── __proto__ → Object.prototype 
+        └── __proto__ → null 
+        
+Object.prototype 
+└── __proto__ → null
+```
+
+## 原型图示例
+![操作示例](/absRes/prototype/1.webp) 
+
+## 原理解释
+```javascript
+// Person这里是一个构造函数，所有的构造函数都指向Function.prototype
+Person.__proto__ === Function.prototype
+
+// Person.prototype这里是对象，所有的对象最终都指向Objec.prototype
+Person.prototype.__proto__ === Object.prototype
+
+// 结论：这里可以把Person或者Person.prototype看成一个this指向，谁调用指向谁
+```
\ No newline at end of file
diff --git a/src/views/welcome/config.json b/src/views/welcome/config.json
index f1a1173..f1d3b5e 100644
--- a/src/views/welcome/config.json
+++ b/src/views/welcome/config.json
@@ -1,12 +1,12 @@
 {
-    "totalNotes": 88,
+    "totalNotes": 92,
     "categories": 5,
-    "lastUpdated": "2026-01-29T03:29:36.051Z",
-    "weeklyAdded": 2,
+    "lastUpdated": "2026-02-03T02:46:03.140Z",
+    "weeklyAdded": 7,
     "categoryChartData": [
         {
             "name": "demo",
-            "value": 77
+            "value": 81
         },
         {
             "name": "python",
@@ -27,34 +27,34 @@
     ],
     "recentNotes": [
         {
-            "path": "demo/formItemWithRangeFields.vue",
-            "title": "表单一个formItem中校验多个字段",
+            "path": "demo/canvasExample.vue",
+            "title": "canvas示例",
             "category": "demo",
-            "date": "2026-01-29"
+            "date": "2026-02-03"
         },
         {
-            "path": "demo/eventListenner/index.vue",
-            "title": "事件监听器的一些总结",
+            "path": "demo/lodashExamples.vue",
+            "title": "Lodash 经典用法",
             "category": "demo",
-            "date": "2026-01-29"
+            "date": "2026-02-02"
         },
         {
-            "path": "demo/elementPlusMessageBoxUse.vue",
-            "title": "element plus中使用messageBox技巧",
+            "path": "demo/code.vue",
+            "title": "面试手写题",
             "category": "demo",
-            "date": "2026-01-13"
+            "date": "2026-02-02"
         },
         {
-            "path": "demo/scrollSnapType.vue",
-            "title": "滚动吸附效果",
+            "path": "demo/formItemWithRangeFields.vue",
+            "title": "表单一个formItem中校验多个字段",
             "category": "demo",
-            "date": "2025-12-31"
+            "date": "2026-02-02"
         },
         {
-            "path": "demo/catchError/index.vue",
-            "title": "明明程序报错，但是控制台不打印错误的几种情况（别怀疑，一定是代码问题，而不是程序运行太久）",
+            "path": "demo/formChangeTrack.vue",
+            "title": "表单敏感字段变更追踪标记",
             "category": "demo",
-            "date": "2025-12-18"
+            "date": "2026-02-02"
         }
     ]
 }
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