r/></span><span class="pun">.</span><span class="pln">setAttribute</span><span class="pun">(</span><span class="str">"id"</span><span class="pun">, </span><span class="str">"test"</span><span class="pun">);

</span><span class="kwd">assert</span><span class="pun">(</span><span class="pln">doc<wbr/></span><span class="pun">.</span><span class="pln">bySelector</span><span class="pun">(</span><span class="str">"p b"</span><span class="pun">)<wbr/>.</span><span class="pln">frontOrThrow<wbr/></span><span class="