<!DOCTYPE html>
<html lang="en" xmlns:v-bind="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8">
<title>Title</title>
<!--1.导入Vue.js-->
<script src="https://cdn.jsdelivr.net/npm/vue@2.5.21/dist/vue.min.js"></script>
</head>
<body>
<!--view层 模板-->
<h1 id="app">{{message}}</h1>
<span id="app2" v-bind:title="message">
鼠标悬停几秒钟查看此处动态绑定的提示信息！
</span>
<br/>
同户名：<input id="placehold" type="text" v-bind:placeholder="message"/>
<script>
var vm = new Vue({
el: "#app2",
//Model : 数据
data:{
message: "hello,vue!"
}
});
var vm = new Vue({
el: "#placehold",
//Model : 数据
data:{
message: "输入用户名"
}
});
</script>
</body>
</html>原文：https://www.cnblogs.com/yuqiliu/p/12195379.html