dat.gui/elements/dat-gui/dat-gui.html

<link rel="import" href="../../../polymer/polymer.html">
<link rel="import" href="../gui-row/gui-row.html">
<link rel="import" href="../gui-button/gui-button.html">

<polymer-element 
    name="dat-gui"
    attributes="docked autoplace open">

<template>

<link rel="stylesheet" href="dat-gui.css">

<div id="container" class="docked-{{ docked }} autoplace-{{ autoPlace }} open-{{ open }} touch-{{ touch }}" >

    <div id="panel">

        <div id="controllers">
            <content></content>
        </div>

        <gui-button hidden?="{{ !autoPlace }}" on-tap="{{ toggleOpen }}" open="{{ open }}"></gui-button>

    </div>

</div>

</template>

<script src="dat-gui.js"></script>

</polymer-element>