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                    isRxQuery()
            
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                                <h1 id="websocket-replication">Websocket Replication</h1>
<p>With the websocket replication plugin, you can spawn a websocket server from a RxDB database in Node.js and replicate with it.</p>
<p><strong>NOTICE</strong>: The websocket replication plugin does not have any concept for authentication or permission handling. It is designed to create an easy <strong>server-to-server</strong> replication. It is <strong>not</strong> made for client-server replication at the moment.</p>
<h2 id="starting-the-websocket-server">Starting the Websocket Server</h2>
<pre><code class="lang-ts"><span class="hljs-keyword">import</span> { createRxDatabase } from <span class="hljs-string">&apos;rxdb&apos;</span>;
<span class="hljs-keyword">import</span> {
    startWebsocketServer
} from <span class="hljs-string">&apos;rxdb/plugins/replication-websocket&apos;</span>;

<span class="hljs-comment">// create a RxDatabase like normal</span>
<span class="hljs-keyword">const</span> myDatabase = await createRxDatabase({<span class="hljs-comment">/* ... */</span>});

<span class="hljs-comment">// start a websocket server</span>
<span class="hljs-keyword">const</span> serverState = await startWebsocketServer({
    database: myDatabase
    port: <span class="hljs-number">1337</span>,
    path: <span class="hljs-string">&apos;socket&apos;</span>
});

<span class="hljs-comment">// stop the server</span>
await serverState.close();
</code></pre>
<h2 id="connect-to-the-websocket-server">Connect to the Websocket Server</h2>
<p>The replication has to be started once for each collection that you want to replicate.</p>
<pre><code class="lang-ts"><span class="hljs-keyword">import</span> {
    syncWebsocketServer
} from <span class="hljs-string">&apos;rxdb/plugins/replication-websocket&apos;</span>;

<span class="hljs-comment">// start the replication</span>
<span class="hljs-keyword">const</span> replicationState = await replicateWithWebsocketServer({
    <span class="hljs-comment">/**
     * To make the replication work,
     * the client collection name must be equal
     * to the server collection name.
     */</span>
    collection: myRxCollection,
    url: <span class="hljs-string">&apos;ws://localhost:1337/socket&apos;</span>
});

<span class="hljs-comment">// stop the replication</span>
await replicationState.cancel();
</code></pre>
<h2 id="customize">Customize</h2>
<p>We use the <a href="https://www.npmjs.com/package/ws" target="_blank">ws</a> npm library, so you can use all optional configuration provided by it.
This is especially important to improve performance by opting in of some optional settings.</p>

                                
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