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<title data-rh="true">🚀 Quickstart | RxDB - JavaScript Database</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:image" content="https://rxdb.info/img/rxdb_social_card.png"><meta data-rh="true" name="twitter:image" content="https://rxdb.info/img/rxdb_social_card.png"><meta data-rh="true" property="og:url" content="https://rxdb.info/quickstart.html"><meta data-rh="true" property="og:locale" content="en"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docusaurus_version" content="current"><meta data-rh="true" name="docusaurus_tag" content="docs-default-current"><meta data-rh="true" name="docsearch:version" content="current"><meta data-rh="true" name="docsearch:docusaurus_tag" content="docs-default-current"><meta data-rh="true" property="og:title" content="🚀 Quickstart | RxDB - JavaScript Database"><meta data-rh="true" name="description" content="Learn how to build a realtime app with RxDB. Follow this quickstart for setup, schema creation, data operations, and real-time syncing."><meta data-rh="true" property="og:description" content="Learn how to build a realtime app with RxDB. Follow this quickstart for setup, schema creation, data operations, and real-time syncing."><link data-rh="true" rel="icon" href="/img/favicon.ico"><link data-rh="true" rel="canonical" href="https://rxdb.info/quickstart.html"><link data-rh="true" rel="alternate" href="https://rxdb.info/quickstart.html" hreflang="en"><link data-rh="true" rel="alternate" href="https://rxdb.info/quickstart.html" hreflang="x-default"><link rel="preconnect" href="https://www.google-analytics.com">
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class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>RxDB Quickstart</h1></header>
<p>Welcome to the RxDB Quickstart. Here we'll learn how to create a simple real-time app with the RxDB database that is able to store and query data persistently in a browser and does realtime updates to the UI on changes.</p>
<center><a href="https://rxdb.info/"><img src="/files/logo/rxdb_javascript_database.svg" alt="JavaScript Embedded Database" width="220"></a></center>
<div style="display:flex;flex-direction:column"><div style="display:flex;align-items:stretch;margin-bottom:1rem;position:relative;min-width:0"><div style="position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;width:32px;margin-right:1rem;min-width:0"><div style="width:32px;height:32px;border-radius:50%;background-color:var(--color-middle);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:bold">1<!-- -->.</div><div style="position:absolute;top:32px;bottom:0;left:50%;width:1px;background:linear-gradient(to bottom, var(--color-middle) 0%, var(--color-middle) 80%, rgba(0,0,0,0) 100%);transform:translateX(-50%)"></div></div><div style="flex:1;min-width:0;overflow-wrap:break-word"><div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="installation">Installation<a href="#installation" class="hash-link" aria-label="Direct link to Installation" title="Direct link to Installation"></a></h3></div><div style="margin-top:0.5rem"><p>Install the RxDB library and the RxJS dependency:</p></div><div style="margin-top:0.5rem"><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar" style="color:#F8F8F2;background-color:#282A36"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token plain">npm install rxdb rxjs</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div></div></div><div style="display:flex;align-items:stretch;margin-bottom:1rem;position:relative;min-width:0"><div style="position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;width:32px;margin-right:1rem;min-width:0"><div style="width:32px;height:32px;border-radius:50%;background-color:var(--color-middle);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:bold">2<!-- -->.</div><div style="position:absolute;top:32px;bottom:0;left:50%;width:1px;background:linear-gradient(to bottom, var(--color-middle) 0%, var(--color-middle) 80%, rgba(0,0,0,0) 100%);transform:translateX(-50%)"></div></div><div style="flex:1;min-width:0;overflow-wrap:break-word"><div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="import">Import<a href="#import" class="hash-link" aria-label="Direct link to Import" title="Direct link to Import"></a></h3></div><div style="margin-top:0.5rem"><p>Import RxDB and the dev-mode plugin, the Dexie-based storage (IndexedDB) and a schema validator:</p></div><div style="margin-top:0.5rem"><div class="language-ts codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-ts codeBlock_bY9V thin-scrollbar" style="color:#F8F8F2;background-color:#282A36"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">import</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"> addRxPlugin</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"> createRxDatabase </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">from</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'rxdb/plugins/core'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">import</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"> RxDBDevModePlugin </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">from</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'rxdb/plugins/dev-mode'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">import</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"> getRxStorageDexie </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">from</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'rxdb/plugins/storage-dexie'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">import</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"> wrappedValidateAjvStorage </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">from</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'rxdb/plugins/validate-ajv'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div></div></div><div style="display:flex;align-items:stretch;margin-bottom:1rem;position:relative;min-width:0"><div style="position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;width:32px;margin-right:1rem;min-width:0"><div style="width:32px;height:32px;border-radius:50%;background-color:var(--color-middle);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:bold">3<!-- -->.</div><div style="position:absolute;top:32px;bottom:0;left:50%;width:1px;background:linear-gradient(to bottom, var(--color-middle) 0%, var(--color-middle) 80%, rgba(0,0,0,0) 100%);transform:translateX(-50%)"></div></div><div style="flex:1;min-width:0;overflow-wrap:break-word"><div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="dev-mode">Dev-Mode<a href="#dev-mode" class="hash-link" aria-label="Direct link to Dev-Mode" title="Direct link to Dev-Mode"></a></h3></div><div style="margin-top:0.5rem"><p>When you use RxDB in development, you should always enable the <a href="/dev-mode.html">dev-mode plugin</a>, which adds helpful checks and validations, and tells you if you do something wrong.</p></div><div style="margin-top:0.5rem"><div class="language-ts codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-ts codeBlock_bY9V thin-scrollbar" style="color:#F8F8F2;background-color:#282A36"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token function" style="color:rgb(80, 250, 123)">addRxPlugin</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token plain">RxDBDevModePlugin</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div></div></div><div style="display:flex;align-items:stretch;margin-bottom:1rem;position:relative;min-width:0"><div style="position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;width:32px;margin-right:1rem;min-width:0"><div style="width:32px;height:32px;border-radius:50%;background-color:var(--color-middle);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:bold">4<!-- -->.</div><div style="position:absolute;top:32px;bottom:0;left:50%;width:1px;background:linear-gradient(to bottom, var(--color-middle) 0%, var(--color-middle) 80%, rgba(0,0,0,0) 100%);transform:translateX(-50%)"></div></div><div style="flex:1;min-width:0;overflow-wrap:break-word"><div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="create-a-database">Create a Database<a href="#create-a-database" class="hash-link" aria-label="Direct link to Create a Database" title="Direct link to Create a Database"></a></h3></div><div style="margin-top:0.5rem"><p>For the database, here we use the <a href="/rx-storage-dexie.html">RxDB Dexie Storage</a> that stores data inside of IndexedDB in a browser. For other JavaScript runtimes, you would not use the dexie storage but one of the other <a href="/rx-storage.html">RxDB Storages</a>.</p></div><div style="margin-top:0.5rem"><div class="language-ts codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-ts codeBlock_bY9V thin-scrollbar" style="color:#F8F8F2;background-color:#282A36"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">const</span><span class="token plain"> myDatabase </span><span class="token operator">=</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">await</span><span class="token plain"> </span><span class="token function" style="color:rgb(80, 250, 123)">createRxDatabase</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> name</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'mydatabase'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> storage</span><span class="token operator">:</span><span class="token plain"> </span><span class="token function" style="color:rgb(80, 250, 123)">wrappedValidateAjvStorage</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> storage</span><span class="token operator">:</span><span class="token plain"> </span><span class="token function" style="color:rgb(80, 250, 123)">getRxStorageDexie</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div></div></div><div style="display:flex;align-items:stretch;margin-bottom:1rem;position:relative;min-width:0"><div style="position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;width:32px;margin-right:1rem;min-width:0"><div style="width:32px;height:32px;border-radius:50%;background-color:var(--color-middle);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:bold">5<!-- -->.</div><div style="position:absolute;top:32px;bottom:0;left:50%;width:1px;background:linear-gradient(to bottom, var(--color-middle) 0%, var(--color-middle) 80%, rgba(0,0,0,0) 100%);transform:translateX(-50%)"></div></div><div style="flex:1;min-width:0;overflow-wrap:break-word"><div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="add-a-collection">Add a Collection<a href="#add-a-collection" class="hash-link" aria-label="Direct link to Add a Collection" title="Direct link to Add a Collection"></a></h3></div><div style="margin-top:0.5rem"><p>An RxDatabase contains <a href="/rx-collection.html">RxCollection</a>s for storing and querying data. A collection is similar to an SQL table, and individual records are stored in the collection as JSON documents. An <a href="/rx-database.html">RxDatabase</a> can have as many collections as you need.
Add a collection with a <a href="/rx-schema.html">schema</a> to the database:</p></div><div style="margin-top:0.5rem"><div class="language-ts codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-ts codeBlock_bY9V thin-scrollbar" style="color:#F8F8F2;background-color:#282A36"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">await</span><span class="token plain"> myDatabase</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token function" style="color:rgb(80, 250, 123)">addCollections</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token comment" style="color:rgb(98, 114, 164)">// name of the collection</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> todos</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token comment" style="color:rgb(98, 114, 164)">// we use the JSON-schema standard</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> schema</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> version</span><span class="token operator">:</span><span class="token plain"> </span><span class="token number">0</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> primaryKey</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'id'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> type</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'object'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> properties</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> id</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> type</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'string'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> maxLength</span><span class="token operator">:</span><span class="token plain"> </span><span class="token number">100</span><span class="token plain"> </span><span class="token comment" style="color:rgb(98, 114, 164)">// <- the primary key must have maxLength</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> name</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> type</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'string'</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> done</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> type</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'boolean'</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> timestamp</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> type</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'string'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> format</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'date-time'</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> required</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">[</span><span class="token string" style="color:rgb(255, 121, 198)">'id'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'name'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'done'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'timestamp'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">]</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div></div></div><div style="display:flex;align-items:stretch;margin-bottom:1rem;position:relative;min-width:0"><div style="position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;width:32px;margin-right:1rem;min-width:0"><div style="width:32px;height:32px;border-radius:50%;background-color:var(--color-middle);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:bold">6<!-- -->.</div><div style="position:absolute;top:32px;bottom:0;left:50%;width:1px;background:linear-gradient(to bottom, var(--color-middle) 0%, var(--color-middle) 80%, rgba(0,0,0,0) 100%);transform:translateX(-50%)"></div></div><div style="flex:1;min-width:0;overflow-wrap:break-word"><div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="insert-a-document">Insert a document<a href="#insert-a-document" class="hash-link" aria-label="Direct link to Insert a document" title="Direct link to Insert a document"></a></h3></div><div style="margin-top:0.5rem"><p>Now that we have an RxCollection we can store some <a href="/rx-document.html">documents</a> in it.</p></div><div style="margin-top:0.5rem"><div class="language-ts codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-ts codeBlock_bY9V thin-scrollbar" style="color:#F8F8F2;background-color:#282A36"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">const</span><span class="token plain"> myDocument </span><span class="token operator">=</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">await</span><span class="token plain"> myDatabase</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token plain">todos</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token function" style="color:rgb(80, 250, 123)">insert</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> id</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'todo1'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> name</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'Learn RxDB'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> done</span><span class="token operator">:</span><span class="token plain"> </span><span class="token boolean">false</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> timestamp</span><span class="token operator">:</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">new</span><span class="token plain"> </span><span class="token class-name">Date</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token function" style="color:rgb(80, 250, 123)">toISOString</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div></div></div><div style="display:flex;align-items:stretch;margin-bottom:1rem;position:relative;min-width:0"><div style="position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;width:32px;margin-right:1rem;min-width:0"><div style="width:32px;height:32px;border-radius:50%;background-color:var(--color-middle);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:bold">7<!-- -->.</div><div style="position:absolute;top:32px;bottom:0;left:50%;width:1px;background:linear-gradient(to bottom, var(--color-middle) 0%, var(--color-middle) 80%, rgba(0,0,0,0) 100%);transform:translateX(-50%)"></div></div><div style="flex:1;min-width:0;overflow-wrap:break-word"><div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="run-a-query">Run a Query<a href="#run-a-query" class="hash-link" aria-label="Direct link to Run a Query" title="Direct link to Run a Query"></a></h3></div><div style="margin-top:0.5rem"><p>Execute a <a href="/rx-query.html">query</a> that returns all found documents once:</p></div><div style="margin-top:0.5rem"><div class="language-ts codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-ts codeBlock_bY9V thin-scrollbar" style="color:#F8F8F2;background-color:#282A36"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">const</span><span class="token plain"> foundDocuments </span><span class="token operator">=</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">await</span><span class="token plain"> myDatabase</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token plain">todos</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token function" style="color:rgb(80, 250, 123)">find</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> selector</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> done</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> $eq</span><span class="token operator">:</span><span class="token plain"> </span><span class="token boolean">false</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token function" style="color:rgb(80, 250, 123)">exec</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div></div></div><div style="display:flex;align-items:stretch;margin-bottom:1rem;position:relative;min-width:0"><div style="position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;width:32px;margin-right:1rem;min-width:0"><div style="width:32px;height:32px;border-radius:50%;background-color:var(--color-middle);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:bold">8<!-- -->.</div><div style="position:absolute;top:32px;bottom:0;left:50%;width:1px;background:linear-gradient(to bottom, var(--color-middle) 0%, var(--color-middle) 80%, rgba(0,0,0,0) 100%);transform:translateX(-50%)"></div></div><div style="flex:1;min-width:0;overflow-wrap:break-word"><div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="update-a-document">Update a Document<a href="#update-a-document" class="hash-link" aria-label="Direct link to Update a Document" title="Direct link to Update a Document"></a></h3></div><div style="margin-top:0.5rem"><p>In the first found document, set <code>done</code> to <code>true</code>:</p></div><div style="margin-top:0.5rem"><div class="language-ts codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-ts codeBlock_bY9V thin-scrollbar" style="color:#F8F8F2;background-color:#282A36"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">const</span><span class="token plain"> firstDocument </span><span class="token operator">=</span><span class="token plain"> foundDocuments</span><span class="token punctuation" style="color:rgb(248, 248, 242)">[</span><span class="token number">0</span><span class="token punctuation" style="color:rgb(248, 248, 242)">]</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">await</span><span class="token plain"> firstDocument</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token function" style="color:rgb(80, 250, 123)">patch</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> done</span><span class="token operator">:</span><span class="token plain"> </span><span class="token boolean">true</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div></div></div><div style="display:flex;align-items:stretch;margin-bottom:1rem;position:relative;min-width:0"><div style="position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;width:32px;margin-right:1rem;min-width:0"><div style="width:32px;height:32px;border-radius:50%;background-color:var(--color-middle);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:bold">9<!-- -->.</div><div style="position:absolute;top:32px;bottom:0;left:50%;width:1px;background:linear-gradient(to bottom, var(--color-middle) 0%, var(--color-middle) 80%, rgba(0,0,0,0) 100%);transform:translateX(-50%)"></div></div><div style="flex:1;min-width:0;overflow-wrap:break-word"><div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="delete-a-document">Delete a document<a href="#delete-a-document" class="hash-link" aria-label="Direct link to Delete a document" title="Direct link to Delete a document"></a></h3></div><div style="margin-top:0.5rem"><p>Delete the document so that it can no longer be found in queries:</p></div><div style="margin-top:0.5rem"><div class="language-ts codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-ts codeBlock_bY9V thin-scrollbar" style="color:#F8F8F2;background-color:#282A36"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">await</span><span class="token plain"> firstDocument</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token function" style="color:rgb(80, 250, 123)">remove</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div></div></div><div style="display:flex;align-items:stretch;margin-bottom:1rem;position:relative;min-width:0"><div style="position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;width:32px;margin-right:1rem;min-width:0"><div style="width:32px;height:32px;border-radius:50%;background-color:var(--color-middle);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:bold">10<!-- -->.</div><div style="position:absolute;top:32px;bottom:0;left:50%;width:1px;background:linear-gradient(to bottom, var(--color-middle) 0%, var(--color-middle) 80%, rgba(0,0,0,0) 100%);transform:translateX(-50%)"></div></div><div style="flex:1;min-width:0;overflow-wrap:break-word"><div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="observe-a-query">Observe a Query<a href="#observe-a-query" class="hash-link" aria-label="Direct link to Observe a Query" title="Direct link to Observe a Query"></a></h3></div><div style="margin-top:0.5rem"><p>Subscribe to data changes so that your UI is always up-to-date with the data stored on disk. RxDB allows you to subscribe to data changes even when the change happens in another part of your application, another browser tab, or during database <a href="/replication.html">replication/synchronization</a>:</p></div><div style="margin-top:0.5rem"><div class="language-ts codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-ts codeBlock_bY9V thin-scrollbar" style="color:#F8F8F2;background-color:#282A36"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">const</span><span class="token plain"> observable </span><span class="token operator">=</span><span class="token plain"> myDatabase</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token plain">todos</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token function" style="color:rgb(80, 250, 123)">find</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> selector</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> done</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> $eq</span><span class="token operator">:</span><span class="token plain"> </span><span class="token boolean">false</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token plain">$ </span><span class="token comment" style="color:rgb(98, 114, 164)">// get the observable via RxQuery.$;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">observable</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token function" style="color:rgb(80, 250, 123)">subscribe</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token plain">notDoneDocs </span><span class="token operator">=></span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token builtin" style="color:rgb(189, 147, 249)">console</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token function" style="color:rgb(80, 250, 123)">log</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token string" style="color:rgb(255, 121, 198)">'Currently have '</span><span class="token plain"> </span><span class="token operator">+</span><span class="token plain"> notDoneDocs</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token plain">length </span><span class="token operator">+</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">' things to do'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token comment" style="color:rgb(98, 114, 164)">// -> here you would re-render your app to show the updated document list</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div></div></div><div style="display:flex;align-items:stretch;margin-bottom:1rem;position:relative;min-width:0"><div style="position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;width:32px;margin-right:1rem;min-width:0"><div style="width:32px;height:32px;border-radius:50%;background-color:var(--color-middle);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:bold">11<!-- -->.</div><div style="position:absolute;top:32px;bottom:0;left:50%;width:1px;background:linear-gradient(to bottom, var(--color-middle) 0%, var(--color-middle) 80%, rgba(0,0,0,0) 100%);transform:translateX(-50%)"></div></div><div style="flex:1;min-width:0;overflow-wrap:break-word"><div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="observe-a-document-value">Observe a Document value<a href="#observe-a-document-value" class="hash-link" aria-label="Direct link to Observe a Document value" title="Direct link to Observe a Document value"></a></h3></div><div style="margin-top:0.5rem"><p>You can also subscribe to the fields of a single RxDocument. Add the <code>$</code> sign to the desired field and then subscribe to the returned observable.</p></div><div style="margin-top:0.5rem"><div class="language-ts codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-ts codeBlock_bY9V thin-scrollbar" style="color:#F8F8F2;background-color:#282A36"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token plain">myDocument</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token plain">done$</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token function" style="color:rgb(80, 250, 123)">subscribe</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token plain">isDone </span><span class="token operator">=></span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token builtin" style="color:rgb(189, 147, 249)">console</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token function" style="color:rgb(80, 250, 123)">log</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token string" style="color:rgb(255, 121, 198)">'done: '</span><span class="token plain"> </span><span class="token operator">+</span><span class="token plain"> isDone</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div></div></div><div style="display:flex;align-items:stretch;margin-bottom:1rem;position:relative;min-width:0"><div style="position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;width:32px;margin-right:1rem;min-width:0"><div style="width:32px;height:32px;border-radius:50%;background-color:var(--color-middle);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:bold">12<!-- -->.</div><div style="position:absolute;top:32px;bottom:0;left:50%;width:1px;background:linear-gradient(to bottom, var(--color-middle) 0%, var(--color-middle) 80%, rgba(0,0,0,0) 100%);transform:translateX(-50%)"></div></div><div style="flex:1;min-width:0;overflow-wrap:break-word"><div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="start-the-replication">Start the Replication<a href="#start-the-replication" class="hash-link" aria-label="Direct link to Start the Replication" title="Direct link to Start the Replication"></a></h3></div><div style="margin-top:0.5rem"><p>RxDB has multiple <a href="/replication.html">replication plugins</a> to replicate database state with a server.
The easiest way to replicate data between your clients' devices is the <a href="/replication-webrtc.html">WebRTC replication plugin</a> that replicates data between devices without a centralized server. This makes it easy to try out replication without having to host anything:</p></div><div style="margin-top:0.5rem"><div class="language-ts codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-ts codeBlock_bY9V thin-scrollbar" style="color:#F8F8F2;background-color:#282A36"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">import</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> replicateWebRTC</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> getConnectionHandlerSimplePeer</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">from</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'rxdb/plugins/replication-webrtc'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token function" style="color:rgb(80, 250, 123)">replicateWebRTC</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> collection</span><span class="token operator">:</span><span class="token plain"> myDatabase</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token plain">todos</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> connectionHandlerCreator</span><span class="token operator">:</span><span class="token plain"> </span><span class="token function" style="color:rgb(80, 250, 123)">getConnectionHandlerSimplePeer</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> topic</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">''</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"> </span><span class="token comment" style="color:rgb(98, 114, 164)">// <- set any app-specific room id here.</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> secret</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'mysecret'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> pull</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> push</span><span class="token operator">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">{</span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token punctuation" style="color:rgb(248, 248, 242)">}</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div></div></div></div>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="next-steps">Next steps<a href="#next-steps" class="hash-link" aria-label="Direct link to Next steps" title="Direct link to Next steps"></a></h2>
<p>You are now ready to dive deeper into RxDB.</p>
<ul>
<li>Start reading the full documentation <a href="/install.html">here</a>.</li>
<li>There is a full implementation of the <a href="https://github.com/pubkey/rxdb-quickstart" target="_blank" rel="noopener noreferrer">quickstart guide</a> so you can clone that repository and play with the code.</li>
<li>For frameworks and runtimes like Angular, React Native and others, check out the list of <a href="https://github.com/pubkey/rxdb/tree/master/examples" target="_blank" rel="noopener noreferrer">example implementations</a>.</li>
<li>Also please continue reading the documentation, join the community on our <a href="/chat/">Discord chat</a>, and star the <a href="https://github.com/pubkey/rxdb" target="_blank" rel="noopener noreferrer">GitHub repo</a>.</li>
<li>If you are using RxDB in a production environment and are able to support its continued development, please take a look at the <a href="/premium/">👑 Premium package</a> which includes additional plugins and utilities.</li>
</ul></div></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/overview.html"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Overview</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/install.html"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Installation</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#installation" class="table-of-contents__link toc-highlight">Installation</a></li><li><a href="#import" class="table-of-contents__link toc-highlight">Import</a></li><li><a href="#dev-mode" class="table-of-contents__link toc-highlight">Dev-Mode</a></li><li><a href="#create-a-database" class="table-of-contents__link toc-highlight">Create a Database</a></li><li><a href="#add-a-collection" class="table-of-contents__link toc-highlight">Add a Collection</a></li><li><a href="#insert-a-document" class="table-of-contents__link toc-highlight">Insert a document</a></li><li><a href="#run-a-query" class="table-of-contents__link toc-highlight">Run a Query</a></li><li><a href="#update-a-document" class="table-of-contents__link toc-highlight">Update a Document</a></li><li><a href="#delete-a-document" class="table-of-contents__link toc-highlight">Delete a document</a></li><li><a href="#observe-a-query" class="table-of-contents__link toc-highlight">Observe a Query</a></li><li><a href="#observe-a-document-value" class="table-of-contents__link toc-highlight">Observe a Document value</a></li><li><a href="#start-the-replication" class="table-of-contents__link toc-highlight">Start the Replication</a></li><li><a href="#next-steps" class="table-of-contents__link toc-highlight">Next steps</a></li></ul></div></div></div></div></main></div></div></div><div class="block footer"><div class="footer-block"><div class="footer-links"><span><a variant="text" href="/" class="footer-logo-button"><img src="/files/logo/logo.svg" alt="RxDB" loading="lazy"><div>RxDB</div></a><div class="footer-community-links"><a variant="text" href="/chat/" target="_blank"><img src="/img/community-links/discord-logo.svg" alt="RxDB Discord" loading="lazy"></a><a variant="text" href="/code/" target="_blank"><img src="/img/community-links/github-logo.svg" alt="RxDB Github" loading="lazy"></a><a variant="text" href="https://twitter.com/intent/user?screen_name=rxdbjs" target="_blank"><img src="/img/community-links/x-logo.svg" alt="RxDB Twitter" loading="lazy"></a><a variant="text" href="https://www.linkedin.com/company/rxdb" target="_blank"><img src="/img/community-links/linkedin-logo.svg" alt="RxDB LinkedIn" loading="lazy"></a><a variant="text" href="https://stackoverflow.com/questions/tagged/rxdb" target="_blank"><img src="/img/community-links/stack-overflow-logo.svg" alt="RxDB Stack Overflow" loading="lazy"></a></div></span><div class="footer-nav-links"><a variant="text" href="/premium/" target="">Premium</a><a variant="text" href="/consulting/" target="">Support</a><a variant="text" href="/overview.html" target="">Documentation</a><a variant="text" href="/chat/" target="_blank">Discord</a><a variant="text" href="/code/" target="_blank">Github</a><a variant="text" href="https://twitter.com/intent/user?screen_name=rxdbjs" target="_blank">Twitter</a><a variant="text" href="https://www.linkedin.com/company/rxdb" target="_blank">LinkedIn</a></div></div><div class="footer-policy"><div><a variant="text" href="/legal-notice/" target="_blank">Legal Notice</a></div><span class="footer-rights">© 2025 RxDB. All rights reserved.</span></div><img class="footer-img desktop-img" src="/img/footer-column.svg" alt="columns" loading="lazy"></div></div><div class="call-to-action-popup"><div class="close"><div class="text">✕</div></div></div></div>
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