diff --git a/src/router/modules/demo.ts b/src/router/modules/demo.ts
index adf546f..f2613b7 100644
--- a/src/router/modules/demo.ts
+++ b/src/router/modules/demo.ts
@@ -94,6 +94,10 @@ const titleArr = [
         key: 'rebindEvent',
         title: '重复绑定相同事件的执行机制',
     },
+    {
+        key: 'reg',
+        title: '正则表达式',
+    },
 ];
 
 // @/views/demo/**/*.vue
diff --git a/src/views/demo/reg/index.vue b/src/views/demo/reg/index.vue
new file mode 100644
index 0000000..d32989b
--- /dev/null
+++ b/src/views/demo/reg/index.vue
@@ -0,0 +1,17 @@
+<template>
+    <div
+        class="markdown-body"
+        v-html="htmlStr"
+    ></div>
+</template>
+
+<script setup>
+import { ref } from 'vue';
+import { marked } from 'marked';
+import { getMarkdownContent } from '@/utils/tools';
+
+const htmlStr = ref('');
+getMarkdownContent('./md/reg.md').then((res) => {
+    htmlStr.value = marked(res);
+});
+</script>
diff --git a/src/views/demo/reg/reg.md b/src/views/demo/reg/reg.md
new file mode 100644
index 0000000..3a4683e
--- /dev/null
+++ b/src/views/demo/reg/reg.md
@@ -0,0 +1,42 @@
+## 身份证，手机号等前端脱敏
+
+```javascript
+/**
+ * 身份证号码脱敏方法
+ * IdNum.replace(/^(.{2}).+(.{2})$/, '$1****$2') 前2后2中间4个*号
+ * IdNum.replace(/^(.{4}).+(.{4})$/, '$1****$2') 前4后4中间4个*号
+ * IdNum.replace(/^(.{2}).+(.{2})$/, '$1******$2') 前2后2中间6个*号
+ * IdNum.replace(/^(.{6}).+(.{6})$/, '$1**$2') 前6后6中间2个*号
+ * @param {string} IdNum
+ * @returns
+ */
+const IdNumberFilter = (IdNum) => {
+    if (IdNum != null) {
+        if (IdNum.length <= 8) {
+            // 当输入的身份证号码长度小于等于8位时，只显示前两位和后两位
+            return IdNum.replace(/^(.{2}).+(.{2})$/, '$1****$2');
+        } else {
+            // 当输入的身份证号码长度大于8位时，只显示前四位和后四位
+            return IdNum.replace(/^(.{4}).+(.{4})$/, '$1****$2');
+        }
+    }
+};
+```
+
+## 邮箱脱敏
+
+```javascript
+/**
+ * 邮箱脱敏方法
+ * @param {string} email
+ * @returns
+ */
+const EmailFilter = (email) => {
+    if (email != null) {
+        // 匹配邮箱的前三位和@符号后的完整域名
+        return email.replace(/^(.{3})[^@]*@(.*)$/, '$1****@$2');
+    }
+};
+
+console.log(EmailFilter('thisistest778@qq.com'))
+```
\ No newline at end of file