diff --git a/website/components/demo-block.vue b/website/components/demo-block.vue
index 3b6bcda6e3..c954ebad41 100644
--- a/website/components/demo-block.vue
+++ b/website/components/demo-block.vue
@@ -28,9 +28,20 @@
       <transition name="text-slide">
         <span v-show="hovering">{{ controlText }}</span>
       </transition>
+      <div class="control-button-container control-button-container-left">
+        <el-button
+          v-show="isExpanded && hasSetup"
+          size="small"
+          type="text"
+          class="control-button"
+          @click.stop="onSwitchSyntax"
+        >
+          {{ showSetup ? langConfig['switch-button-option-text'] : langConfig['switch-button-setup-text'] }}
+        </el-button>
+      </div>
       <div class="control-button-container">
         <el-button
-          v-show="hovering || isExpanded"
+          v-show="isExpanded"
           ref="copyButton"
           size="small"
           type="text"
@@ -42,7 +53,7 @@
         <el-tooltip effect="dark" :content="langConfig['tooltip-text']" placement="right">
           <transition name="text-slide">
             <el-button
-              v-show="hovering || isExpanded"
+              v-show="isExpanded"
               size="small"
               type="text"
               class="control-button  run-online-button"
@@ -61,15 +72,20 @@ import { nextTick } from 'vue'
 import hljs from 'highlight.js'
 import clipboardCopy from 'clipboard-copy'
 import compoLang from '../i18n/component.json'
-import { stripScript, stripStyle, stripTemplate } from '../util'
+import { stripScript, stripStyle, stripTemplate, stripSetup, removeSetup } from '../util'
 const version = '1.0.0' // element version
 const stripTemplateAndRemoveTemplate = code => {
-  const result = stripTemplate(code)
+  const result = removeSetup(stripTemplate(code))
   if (result.indexOf('<template>') === 0) {
     return result.replace(/^<template>/, '').replace(/<\/template>$/,'')
   }
   return result
 }
+const sanitizeHTML = str => {
+  const temp = document.createElement('div')
+  temp.textContent = str
+  return temp.innerHTML
+}
 export default {
   data() {
     return {
@@ -82,6 +98,8 @@ export default {
       isExpanded: false,
       fixedControl: false,
       scrollParent: null,
+      showSetup: false,
+      hasSetup: false,
     }
   },
 
@@ -110,18 +128,14 @@ export default {
       return this.$el.getElementsByClassName('meta')[0]
     },
 
-    codeAreaHeight() {
-      if (this.$el.getElementsByClassName('description').length > 0) {
-        return this.$el.getElementsByClassName('description')[0].clientHeight +
-            this.$el.getElementsByClassName('highlight')[0].clientHeight + 20
-      }
-      return this.$el.getElementsByClassName('highlight')[0].clientHeight
+    displayDemoCode () {
+      return this.showSetup ? this.codepen.setup : this.codepen.script
     },
   },
 
   watch: {
     isExpanded(val) {
-      this.codeArea.style.height = val ? `${ this.codeAreaHeight + 1 }px` : '0'
+      this.setCodeAreaHeight()
       if (!val) {
         this.fixedControl = false
         this.$refs.control.style.left = '0'
@@ -151,31 +165,62 @@ export default {
         this.codepen.html = stripTemplateAndRemoveTemplate(code)
         this.codepen.script = stripScript(code)
         this.codepen.style = stripStyle(code)
+        this.codepen.setup = stripSetup(code)
+        if (this.codepen.setup) {
+          this.hasSetup = true
+        }
       }
     }
   },
 
-  mounted() {
-    nextTick(() => {
-      let highlight = this.$el.getElementsByClassName('highlight')[0]
-      if (this.$el.getElementsByClassName('description').length === 0) {
-        highlight.style.width = '100%'
-        highlight.borderRight = 'none'
-      }
-
-      try {
-        hljs.highlightBlock(highlight.querySelector('code'))
-      } catch (error) {
-        console.log(error)
-      }
-    })
-  },
-
   beforeUnmount() {
     this.removeScrollHandler()
   },
 
+  mounted () {
+    this.prettyCode()
+  },
+
   methods: {
+    getCodeAreaHeight() {
+      if (this.$el.getElementsByClassName('description').length > 0) {
+        return this.$el.getElementsByClassName('description')[0].clientHeight +
+            this.$el.getElementsByClassName('highlight')[0].clientHeight + 20
+      }
+      return this.$el.getElementsByClassName('highlight')[0].clientHeight
+    },
+    setCodeAreaHeight () {
+      this.codeArea.style.height = this.isExpanded ? `${ this.getCodeAreaHeight() + 1 }px` : '0'
+    },
+    prettyCode () {
+      nextTick(() => {
+        const highlight = this.$el.querySelector('.highlight')
+        const hlcode = highlight.querySelector('pre code')
+        hlcode.innerHTML = sanitizeHTML(`<template>${this.codepen.html}</template>
+
+<script>
+  ${this.displayDemoCode}
+${'</sc' + 'ript>'}
+`)
+
+        nextTick(() => {
+          if (this.$el.getElementsByClassName('description').length === 0) {
+            highlight.style.width = '100%'
+            highlight.borderRight = 'none'
+          }
+          try {
+            hljs.highlightBlock(hlcode)
+          } catch (error) {
+            console.log(error)
+          }
+        })
+      })
+    },
+    onSwitchSyntax () {
+      this.showSetup = !this.showSetup
+      this.prettyCode()
+      this.$nextTick(this.setCodeAreaHeight)
+    },
     copy() {
       const res = clipboardCopy(`
 <template>
@@ -387,6 +432,12 @@ ${this.codepen.style}
         padding-right: 25px;
       }
 
+      .control-button-container-left {
+        left: 0;
+        width: 100px;
+        padding-left: 14px; // 14 + 10 = 24px .hljs code padding left 24
+      }
+
       .control-button {
         font-size: 14px;
         margin: 0 10px;
diff --git a/website/docs/zh-CN/radio.md b/website/docs/zh-CN/radio.md
index 084021f51f..34c8813701 100644
--- a/website/docs/zh-CN/radio.md
+++ b/website/docs/zh-CN/radio.md
@@ -23,6 +23,18 @@
     }
   }
 </script>
+<!--
+<setup>
+  import { ref } from 'vue'
+
+  export default {
+    setup() {
+      const radio = ref('1');
+      return { radio }
+    }
+  }
+</setup>
+-->
 ```
 :::
 
diff --git a/website/i18n/component.json b/website/i18n/component.json
index b2d971b1db..f7e1446ee0 100644
--- a/website/i18n/component.json
+++ b/website/i18n/component.json
@@ -5,6 +5,8 @@
       "hide-text": "隐藏代码",
       "show-text": "显示代码",
       "copy-button-text": "复制代码片段",
+      "switch-button-option-text": "切换成 Options API",
+      "switch-button-setup-text": "切换成 Composition API",
       "copy-success": "已复制！",
       "copy-error": "该浏览器不支持自动复制！",
       "run-online-button-text": "在线运行",
@@ -39,6 +41,8 @@
       "hide-text": "Hide",
       "show-text": "Expand",
       "copy-button-text": "Copy",
+      "switch-button-option-text": "Switch to Options API",
+      "switch-button-setup-text": "Switch to Composition API",
       "copy-success": "Copied！",
       "copy-error": "This browser does not support automatic copy！",
       "run-online-button-text": "Try it!",
@@ -73,6 +77,8 @@
       "hide-text": "Ocultar",
       "show-text": "Mostrar",
       "copy-button-text": "Copiar",
+      "switch-button-option-text": "Cambiar a Options API",
+      "switch-button-setup-text": "Cambiar a Composition API",
       "copy-success": "Copiar correctamente!",
       "copy-error": "Este navegador no admite copia automática!",
       "run-online-button-text": "Probar",
@@ -107,6 +113,8 @@
       "hide-text": "Réduire",
       "show-text": "Agrandir",
       "copy-button-text": "Copie",
+      "switch-button-option-text": "Passer au Options API",
+      "switch-button-setup-text": "Passer au Composition API",
       "copy-success": "Copier avec succès!",
       "copy-error": "Ce navigateur ne prend pas en charge la copie automatique!",
       "run-online-button-text": "Essayez!",
@@ -141,6 +149,8 @@
       "hide-text": "隠す",
       "show-text": "展開する",
       "copy-button-text": "コピー",
+      "switch-button-option-text": "Options API に切り替える",
+      "switch-button-setup-text": "Composition API に切り替える",
       "copy-success": "正常にコピー!",
       "copy-error": "このブラウザは自動コピーをサポートしていません!",
       "run-online-button-text": "試してみる!",
diff --git a/website/util.js b/website/util.js
index 36a67c805f..dd9a5ec740 100644
--- a/website/util.js
+++ b/website/util.js
@@ -13,5 +13,23 @@ export function stripTemplate(content) {
   if (!content) {
     return content
   }
-  return content.replace(/<(script|style)[\s\S]+<\/\1>/g, '').trim()
+  return content
+    .replace(/<(script|style)[\s\S]+<\/\1>/g, '')
+    .trim()
+}
+
+const setupCommentGlobalRegx = /<!--[\r?\n|\r]?(<setup>[\s\S]+)-->/g
+export function removeSetup (content) {
+  return content
+    .replace(setupCommentGlobalRegx, '')
+    .trim()
+}
+
+const setupCommentRegx = /<!--[\r?\n|\r]?(<setup>[\s\S]+)-->/
+export function stripSetup(content) {
+  const result = content.match(setupCommentRegx)
+  const comment = result && result[1] ? result[1].trim() : ''
+  if (!comment) return comment
+  const result2 = comment.match(/<(setup)>([\s\S]+)<\/\1>/)
+  return result2 && result2[2] ? result2[2].trim() : ''
 }