// 用v-for for of 遍历数组得到数据，v-model进行双向数据绑定
// v-bind，生成动态属性，不然不加冒号直接写value="item.value"，会当成字符串解析
<!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>
<script src="https://unpkg.com/vue@next"></script>
</head>
<body>
<div id="root"></div>
</body>
<script>
const app = Vue.createApp({
data() {
return {
selectValue: "",
ajaxValue: [
{ text: "北京", value: "beijing" },
{ text: "上海", value: "shanghai" },
{ text: "广州", value: "guangzhou" },
{ text: "深圳", value: "shenzhen" },
],
};
},
template: `
<h1>城市{{selectValue}}</h1>
<select v-model="selectValue">
<option disabled>请选择你的城市</option>
<option v-for="item of ajaxValue" :value="item.value">{{item.text}}</option>
</select>
`,
});
const vm = app.mount("#root");
</script>
</html>
