     <section>
        <h3>
          The <dfn>getTitlebarAreaRect</dfn> method
        </h3>
        <p>
          The `getTitlebarAreaRect()` method returns a DOMRect that represents
          the available area for displaying web content. This available title
          bar region does not include the area under the [=window controls=]
          [=overlay=].
        </p><img src="spec-wco-gbr.png" alt=
        "depiction of the area returned by the getTitlebarAreaRect method">
        <aside class="note">