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<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="./vue3.js"></script>
</head>
<body>
<div id="counter">
<div>
vue的语法，告诉vue，这里面放了一个变量
{{num}}
</div>
</div>
<script>
const Counter = {
data: function () {
return {
num: 0,
name: "张三"
}
}
}
Vue.createApp(Counter).mount("#counter");
let app = Vue.createApp(Counter).mount("#counter");
console.log(app);
app.num =4
</script>
</body>
</html>
