><span class="p">();</span> <span class="c1">// all function calls are ignored</span><br/><br/><span class="nx">foo</span><span class="p">.</span><span class="nx">callback</span><span class="p">();</span> <span class="c1">// all function calls are ignored</span><br/><br/><span class="nx">foo</span><span class="p">.</span><span class="nx">data</span><span class="p">;</span> <span class="c1">// all property names that are not assignments are ignored</span><br/></code></pre>
</div>

<h2 id="when-not-to-use-it"