Edit in JSFiddle

<template id="my-template">
    <span style="font-family:{{font}}">Showing in {{font}} font!</span>
    <select value="{{font}}">
        <option value="Serif">Serif</option>
        <option value="Sans-Serif">Sans-Serif</option>
        <option value="Monospace">Monospace</option>
    </select>
</template>