1-1 初学编写 HelloWorld 和 Counter

<!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>Document</title>
    <script src="https://unpkg.com/vue@next"></script>
</head>
<body>
    <div id="root"></div>
    <div id="root1"></div>
</body>

<script>
    // vue基础写法
    // Vue.createApp({
    //     template:'<div>hello</div>'
    // }).mount('#root');

    // vue传变量
    Vue.createApp({
        data() {
            return {
                content : 1
            }
        },
        mounted() {
            // console.log('mounted');
            setInterval(() => {
                this.content += 1;
            }, 1000);
        },
        template:'<div>{{content}}</div>'
    }).mount('#root');
</script>
</html>
Vue3.js

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