Vue中v-model的資料雙向綁定

<template>
  <div id="app">
    <div id="example-5">
      <select v-model="selected">
        <option disabled value>請選擇</option>
        <option>小明</option>
        <option>小美</option>
        <option>小王</option>
      </select>
      <span>Selected: {{ selected }}</span>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      selected: ""
    };
  }
};
</script>