I have two elements: one element <drop-down>, another element <populated-drop-down>. populated-drop-down extends drop-downbut, as you might have guessed, trying to pre-populate it with some parameters. It was assumed that I could just put the HTML inside the tag <shadow></shadow>, but this does not work:
<polymer-element name="drop-down" noscript attributes="label">
<template>
<style>
:host{display:inline-block;border:1px solid;padding:1rem}
#content{position:absolute}
#drop, #content {display:none}
#drop:checked + #content {display:block}
</style>
<label for="drop">{{label}}</label>
<input type="checkbox" id="drop">
<div id="content"><content></content></div>
</template>
</polymer-element>
<polymer-element name="pop-drop-down" extends="drop-down" noscript>
<template>
<shadow>
<ul>
<li>Option1</li>
<li>Option2</li>
<li>Option3</li>
<li>Option4</li>
<li>Option5</li>
</ul>
</shadow>
</template>
</polymer-element>
<drop-down label="Working DropDown">
<ul>
<li>Option1</li>
<li>Option2</li>
<li>Option3</li>
<li>Option4</li>
<li>Option5</li>
</ul>
</drop-down>
<pop-drop-down label="Not working pre-populated dropdown">
</pop-drop-down>
( Code is also available for code in JSBin .)
It seems I can wrap extra tags around <shadow></shadow>, but not put inside<shadow></shadow>
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