class="tsd-parameter-list"><li><h5><span class="tsd-kind-parameter">e</span>: <a href="ForceDirectedEdge.html" class="tsd-signature-type tsd-kind-class">ForceDirectedEdge</a></h5></li></ul></div><h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">number</span></h4><p>Returns the length of the edge representing a link,
the value of <a href="ForceDirectedEdge.html#length" class="tsd-kind-accessor">ForceDirectedEdge.length</a> if it&#39;s a number,
or else the value of <a href="ForceDirected