<p></p>
<p dir="auto">Okay, firing events from <code class="notranslate">addObject</code> / <code class="notranslate">removeObject</code> turned out to be the best idea. And I changed this PR to use <code class="notranslate">baselayerchange</code>/<code class="notranslate">overlaylayerchange</code></p>
<p dir="auto">I also replaced layeradd for <code class="notranslate">map.on("layeradd",...)</code>, which tracks the layer's on/off state with <code class="notranslate">dataLayer.on("add", ...)</code>. Using <code class="notranslate">overlaylayerchange</code> in this case doesn't work, because this event isn't thrown when opening a new page with <code class="notranslate">...&layers=D</code> Plus `add ' / 'remove' looks cleaner in my opinion.</p>

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