-class.html">HttpClient</a>.</p>
<p>The default value is <code>Dart/&lt;version&gt; (dart:io)</code>.</p>
<p>If the userAgent is set to <code>null</code>, no default <code>User-Agent</code> header will be
added to each request.</p>
        </section>
                <section class="summary source-code" id="source">
          <h2><span>Implementation</span></h2>
          <pre class="language-dart"><code class="language-dart">String userAgent

</code></pre>
        </section>

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