ll result in all log messages having the custom field <code class="highlighter-rouge">_something</code> set to ‘yep’.</p>

<h1 id="example-custom-fields-in-log-message">Example (custom fields in log message)</h1>
<div class="language-javascript highlighter-rouge"><pre class="highlight"><code><span class="nx">log4js</span><span class="p">.</span><span class="nx">configure</span><span class="p">({</span>
  <span class="na">appenders</span><span class="p">:</span> <span class="p">{</span>
    <span class="