html

<div id="app">
    <h3>{{ web.show }}</h3>
    <p v-show="web.show">邓瑞编程 dengruicode.com</p>

    <button @click="toggle">点击切换显示状态</button>
</div>

js

<script type="module">
    import { createApp, reactive } from './vue.esm-browser.js'
    
    createApp({
        setup() {
            const web = reactive({
                show: true
            })

            const toggle = () => {
                web.show = !web.show
            }

            return {
                web,
                toggle
            }
        }
    }).mount("#app")

</script>