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                                <h1 id="debugging-ovto-app">Debugging Ovto app</h1>
<h2 id="consolelog">console.log</h2>
<p>In an Ovto app, you can print any object to developer console by <code>console.log</code>
like in JavaScript. </p>
<pre><code class="lang-rb">console.log(<span class="hljs-symbol">state:</span> State.new)
</code></pre>
<p>This is mostly equal to <code>p state: State.new</code> but <code>console.log</code> supports
JavaScript objects too.</p>
<p>(Note: this is not an official feature of Opal. You can do this setup by this:)</p>
<pre><code class="lang-rb">  <span class="hljs-keyword">require</span> <span class="hljs-string">&apos;console&apos;</span>; <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">console</span>;</span> $console; <span class="hljs-keyword">end</span>
</code></pre>
<h2 id="ovto-debug">ovto-debug</h2>
<p>If the page has a tag with <code>id=&apos;ovto-debug&apos;</code>, exception is shown in the tag.</p>
<h2 id="ovtodebugtrace">Ovto.debug_trace</h2>
<p>If <code>Ovto.debug_trace</code> is set to <code>true</code>, some diagnostic messages are shown in the browser console.</p>
<pre><code class="lang-rb">Ovto.debug_trace = <span class="hljs-keyword">true</span>
MyApp.run(<span class="hljs-symbol">id:</span> <span class="hljs-string">&apos;ovto&apos;</span>)
</code></pre>

                                
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