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<h1 class="title indent">
Creating custom UI
</h1>
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<hr class="divider">
<p>If you would like to use your own <a href="/developers/frontend_add_card/">State card</a> without merging your code into <a href="https://github.com/home-assistant/home-assistant-polymer/">home-assistant-polymer</a> you can create your own implementation.</p>
<p>Put the element source file and its dependencies in <code class="highlighter-rouge">www/custom_ui/</code> directory under your Home Assistant <a href="/docs/configuration/">configuration</a> directory.</p>
<p>For example if creating a state card for the <code class="highlighter-rouge">light</code> domain named <code class="highlighter-rouge">state-card-my-custom-light</code> put <code class="highlighter-rouge">state-card-my-custom-light.html</code> in <code class="highlighter-rouge">www/custom_ui/</code>.</p>
<p>That file should implement <code class="highlighter-rouge">&lt;state-card-my-custom-light&gt;</code> tag with Polymer.</p>
<p>In <code class="highlighter-rouge">state-card-my-custom-light.html</code> you should use <code class="highlighter-rouge">&lt;link rel="import"&gt;</code> to import all the dependencies <strong>not</strong> used by Home Assistants UI.
Do not import any dependencies used by the Home Assistant UI.
Importing those will work in <code class="highlighter-rouge">development: 1</code> mode, but will fail in production mode.</p>
<ol>
<li>In the <code class="highlighter-rouge">customize:</code> section of the <code class="highlighter-rouge">configuration.yaml</code> file put <code class="highlighter-rouge">custom_ui_state_card: state-card-my-custom-light</code>.</li>
<li>In the <code class="highlighter-rouge">frontend</code> section use <code class="highlighter-rouge">extra_html_url</code> to specify the URL to load.</li>
</ol>
<p>Example:</p>
<p><code class="highlighter-rouge">configuration.yaml</code>:</p>
<div class="language-yaml highlighter-rouge"><pre class="highlight"><code><span class="s">homeassistant</span><span class="pi">:</span>
<span class="s">customize</span><span class="pi">:</span>
<span class="s">light.bedroom</span><span class="pi">:</span>
<span class="s">custom_ui_state_card</span><span class="pi">:</span> <span class="s">state-card-my-custom-light</span>
<span class="s">frontend</span><span class="pi">:</span>
<span class="s">extra_html_url</span><span class="pi">:</span>
<span class="pi">-</span> <span class="s">/local/custom_ui/state-card-my-custom-light.html</span>
</code></pre>
</div>
<p><code class="highlighter-rouge">www/custom_ui/state-card-my-custom-light.html</code>:</p>
<div class="language-javascript highlighter-rouge"><pre class="highlight"><code><span class="o">&lt;</span><span class="nx">dom</span><span class="o">-</span><span class="nx">module</span> <span class="nx">id</span><span class="o">=</span><span class="s1">'state-card-my-custom-light'</span><span class="o">&gt;</span>
<span class="o">&lt;</span><span class="nx">template</span><span class="o">&gt;</span>
<span class="o">&lt;</span><span class="nx">style</span><span class="o">&gt;</span>
<span class="o">&lt;</span><span class="sr">/style</span><span class="err">&gt;
</span> <span class="o">&lt;</span><span class="nx">textarea</span><span class="o">&gt;</span><span class="p">[[</span><span class="nx">_toStr</span><span class="p">(</span><span class="nx">stateObj</span><span class="p">)]]</span><span class="o">&lt;</span><span class="sr">/textarea</span><span class="err">&gt;
</span> <span class="o">&lt;</span><span class="sr">/template</span><span class="err">&gt;
</span><span class="o">&lt;</span><span class="sr">/dom-module</span><span class="err">&gt;
</span>
<span class="o">&lt;</span><span class="nx">script</span><span class="o">&gt;</span>
<span class="kr">class</span> <span class="nx">StateCardMyCustomLight</span> <span class="kr">extends</span> <span class="nx">Polymer</span><span class="p">.</span><span class="nx">Element</span> <span class="p">{</span>
<span class="kr">static</span> <span class="nx">get</span> <span class="nx">is</span><span class="p">()</span> <span class="p">{</span> <span class="k">return</span> <span class="s1">'state-card-my-custom-light'</span><span class="p">;</span> <span class="p">}</span>
<span class="kr">static</span> <span class="nx">get</span> <span class="nx">properties</span><span class="p">()</span> <span class="p">{</span>
<span class="k">return</span> <span class="p">{</span>
<span class="c1">// Home Assistant object</span>
<span class="na">hass</span><span class="p">:</span> <span class="nb">Object</span><span class="p">,</span>
<span class="c1">// inDialog is true if shown as more-info-card</span>
<span class="na">inDialog</span><span class="p">:</span> <span class="p">{</span>
<span class="na">type</span><span class="p">:</span> <span class="nb">Boolean</span><span class="p">,</span>
<span class="na">value</span><span class="p">:</span> <span class="kc">false</span><span class="p">,</span>
<span class="p">},</span>
<span class="c1">// includes state, config and more information of the entity</span>
<span class="na">stateObj</span><span class="p">:</span> <span class="nb">Object</span><span class="p">,</span>
<span class="p">};</span>
<span class="p">}</span>
<span class="nx">_toStr</span><span class="p">(</span><span class="nx">obj</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">JSON</span><span class="p">.</span><span class="nx">stringify</span><span class="p">(</span><span class="nx">obj</span><span class="p">);</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="nx">customElements</span><span class="p">.</span><span class="nx">define</span><span class="p">(</span><span class="nx">StateCardMyCustomLight</span><span class="p">.</span><span class="nx">is</span><span class="p">,</span> <span class="nx">StateCardMyCustomLight</span><span class="p">);</span>
<span class="o">&lt;</span><span class="sr">/script</span><span class="err">&gt;
</span></code></pre>
</div>
<p>For more possibilities, see the <a href="/cookbook/#user-interface">Custom UI section</a> on our Examples page.</p>
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