浏览器显示不出来hello word这是怎么回事啊？
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Vue入门</title>
<script src="./vue.js"></script>
</head>
<body>
<div id="root">{{msg}}</div>
<script>
new Vue({
el:"#root",
data:{
msg:"hello word"
}
})
</script>
</body>
</html>
