       <div class="features">final</div>
        </section>
        <section class="desc markdown">
          <p>For PointerDeviceKind.stylus and PointerDeviceKind.invertedStylus events:</p>
<p>The angle of the stylus, in radians in the range:</p>
<p>   0 &lt;= tilt &lt;= pi/2</p>
<p>...giving the angle of the axis of the stylus, relative to the axis
perpendicular to the input surface (thus 0.0 indicates the stylus is
orthogonal to the plane of the input surface, while pi/2 indicates that
the stylus is flat