at while <var>k</var> &lt; <var>len</var><ol><li>Let <var>kValue</var> be <var>items</var>[<var>k</var>].</li><li>Call(<var>adder</var>, <var>weakset</var>, <var>kValue</var>)</li><li>Increase <var>k</var> by 1.</li></ol></li><li>Return <var>weakset</var>.

</li></ol></emu-alg><p>The <code>length</code> property of the <code>addAll</code> method is <emu-val>0</emu-val>.</p></emu-import>
</emu-clause>

<emu-clause id="WeakSet.prototype.deleteAll">
    <h1><span class="secnum">6</span> WeakSet.prototype.delet