ib.constants.Z_FULL_FLUSH</code> for zlib-based streams,
<code>zlib.constants.BROTLI_OPERATION_FLUSH</code> for Brotli-based streams.</li>
<li><code>callback</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&#x3C;Function></a></li>
</ul>
<p>Flush pending data. Don't call this frivolously, premature flushes negatively
impact the effectiveness of the compression algorithm.</p>
<p>Calling this only flushes data from the internal <code>zlib<