首先引入vue.js文件
<script src="vue.js"></script>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Dom</title>
<script src="vue.js"></script>
</head>
<body>
<div id="app">
{{message}}
</div>
<script>
new Vue({
el:"#app",
data:{
message:"Hello world"
}
})
</script>
</body>
</html>