<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue 测试实例 - 菜鸟教程(runoob.com)</title>
<script src="https://cdn.staticfile.net/vue/3.2.36/vue.global.min.js"></script>
<style>
#app {
border: dashed black 1px;
display: inline-block;
padding-bottom: 10px;
}
#app > button {
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