diff --git a/package.json b/package.json
index 2cb0d58..175fd8d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@bd/core",
-  "version": "1.4.0",
+  "version": "1.4.1",
   "type": "module",
   "description": "百搭UI组件库的核心",
   "main": "dist/index.js",
diff --git a/src/constants.js b/src/constants.js
index 3ecec6f..116ac58 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -132,11 +132,9 @@ export function fixedValue(value, options) {
   switch (options.type) {
     case Number:
       return value === null ? null : +value || 0
-      break
 
     case Boolean:
       return value === false ? false : value !== null
-      break
 
     case Object:
       if (typeof value === 'object') {
@@ -148,7 +146,6 @@ export function fixedValue(value, options) {
           return {}
         }
       }
-      break
 
     case Array:
       if (typeof value === 'object') {
@@ -160,10 +157,8 @@ export function fixedValue(value, options) {
           return []
         }
       }
-      break
 
     default:
-      return value === null ? null : value + ''
-      break
+      return value === null || value === void 0 ? null : value + ''
   }
 }
diff --git a/src/index.js b/src/index.js
index a4c4123..1a13700 100644
--- a/src/index.js
+++ b/src/index.js
@@ -56,14 +56,14 @@ export class Component extends HTMLElement {
           return
         }
         this[key] = value
+        this.#requestUpdate(name, oldValue)
         if (options.observer) {
           options.observer.call(this, value, oldValue)
         }
-        this.#requestUpdate(name, oldValue)
       },
       enumerable: false
     }
-    this.prototype[key] = options.default
+
     this[__props__].set(name, options)
     Object.defineProperty(this.prototype, name, descriptor)
   }
@@ -102,7 +102,12 @@ export class Component extends HTMLElement {
     this.root = this.shadowRoot || this.attachShadow({ mode: 'open' })
 
     this[__changed_props__] = new Map() // 记录本次变化的属性
-    // 手动执行一次渲染
+    // 初始化 props
+    this.constructor[__props__].forEach((options, prop) => {
+      this[prop] = options.default
+    })
+
+    // 若无定义props时, 手动执行一次渲染
     if (this[__pending__] === false) {
       this[__pending__] = true
       nextTick(_ => this[__updated__]())
@@ -144,6 +149,9 @@ export class Component extends HTMLElement {
       return
     }
 
+    // name === 'icon' &&
+    //   console.log(name, '>>>', options.default, ':::', this[name])
+
     switch (options.type) {
       case Number:
       case String: