    <section class="desc markdown">
          <p>Access the union of all <a href="dart-html/CssStyleDeclaration-class.html">CssStyleDeclaration</a>s that are associated with an
<a href="dart-html/ElementList-class.html">ElementList</a>.</p>
<p>Grouping the style objects all together provides easy editing of specific
properties of a collection of elements. Setting a specific property value
will set that property in all <a href="dart-html/Element-class.html">Element</a>s in the <a href="dart-html/ElementList-