<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
<select v-model="item" multiple>
<option >天津</option>
<option>上海</option>
<option>重庆</option>
<option >北京</option>
</select>
<span>被选中的城市为：{{item}}</span>
</div>
<script>
var v=new Vue({
el:"#app",
data:{
item:[]
}
});
</script>
</body>
</html>
