I have a user form in which the user gets to choose from three countries and displays it back to the user in the form of an alert. It looks something like this:

```js
function myFunction() {
  //alert back to user
  alert(document.getElementById("options").value)
}
```

```html
<head>
  <script type="module" src="https://cdn.jsdelivr.net/npm/@ionic/core/dist/ionic/ionic.esm.js"></script>
  <script nomodule src="https://cdn.jsdelivr.net/npm/@ionic/core/dist/ionic/ionic.js"></script>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@ionic/core/css/ionic.bundle.css" />

</head>

<ion-list>
  <ion-item style="display: none;">
    <ion-label style="display: none;">
      Select Region
    </ion-label>
    <ion-select style="display: none;" id="options">
      <ion-select-option>USA</ion-select-option>
      <ion-select-option>UK</ion-select-option>
      <ion-select-option>Canada</ion-select-option>
    </ion-select>
  </ion-item>
</ion-list>

<button onclick="myFunction()">Click to retrieve</button>
```

Again, as the title suggests, I do NOT want to use jquery, I only want to use Native, Vanilla JavaScript.

How would I do this?