dat.gui/elements/controller-option/controller-option.html

<link rel="import" href="../controller-base/controller-base.html">

<script src="controller-option.js"></script>

<polymer-element name="controller-option" extends="controller-base" attributes="options key">

<template>

<link rel="stylesheet" href="controller-option.css">

<div id="container" horizontal layout center>
    
    <select value="{{ key }}" on-change="{{ change }}">

        <template repeat="{{ name in options | keys }}">
            <option value="{{ name }}">{{ name }}</option>
        </template>

    </select>

</div>

</template>

</polymer-element>