<!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>
<style>
.hh{
line-height: 60px;
}
</style>
</head>
<body>
<div id="app">
<h3 style="background-color: red;" :style="{color,height}" :class="{hh}">{{msg}}</h3>
</div>
<script src="https://unpkg.com/vue@next"></script>
<!-- <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> -->
<script>
/*vue2.0
const app=new Vue({
el: "#app",
data: {
msg:"this is vue2.0 msg"
}
})
*/
//vue3.0
const app=Vue.createApp({
data() {
return {
msg:"this is vue3.0 msg",
color:'green',
height:'60px',
hh:true,
}
}
}).mount("#app");
</script>
</body>
</html>
