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<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>声明组件与子组件</title></head><body><!-- 挂载点 --><div id="app"><!-- 组件挂载 --><appsan /></div><script>// 应用实例const app = Vue.createApp({}).mount('#app')// 全局组件，父组件app.component('appsan', {})// 声明子组件component:{}</script></body></html>
