src/elements/markdown-top-nav.html
<template>
<div class="w3-center w3-card-2 w3-theme-d5" style="position: sticky;top: 0">
<span class="w3-large"><b>${navtitle} </b></span>
<span class="w3-left w3-large" click.delegate="showhidefull()" title="switch fullscreen and navigation"> <i class="fa fa-arrows-alt"></i> </span>
<span class="w3-left w3-large" click.delegate="showhidenav()" title="switch navigation"> <i class="fa fa-list"></i> </span>
<span class="w3-right w3-large" click.delegate="showhidetoc()" title="switch table of content"> <i class="fa fa-file-text-o"></i> </span>
</div>
</template>