源代码 ：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Vue 测试实例 - 开源教程(ossoft.cn)</title> <script src="https://unpkg.com/vue@next"></script> <style> .active { width: 100px; height: 100px; background: green; } </style> </head> <body> <div id="app"> <div :class="{ 'active': isActive }"></div> </div> <script> const app = { data() { return { isActive: true } } } Vue.createApp(app).mount('#app') </script> </body> </html>
运行结果