title: How to listen to value change in react-native-reanimated?
body: <p>I have created a simple animation with <code>Animated</code> from <code>react-native</code> with <code>react-native-svg</code>.</p>
  
  <p>This do the jobs well,</p>
  
  <p>But Now I switched to <code>react-native-reanimated</code> cuz I read on their website that reanimated is faster than <code>Animated</code> from <code>react-native</code>.</p>
  
  <p>But here I faced with a problem, and that is I cant find function <code>addListener</code> to listen to the value changes.</p>
  
  <p>Code with <code>Animated</code> from <code>react-native</code>:</p>
  
  <pre><code>const circleRadius = new Animated.value(100);
  
  circleRadius.addListener( circleRadius =&gt; {
         circleSVG.current.setNativeProps({ cx: circleRadius.value.toString() });
  });
  </code></pre>
  
  <p><strong>How can I implement above <code>addListener</code> function in</strong> <code>react-native-reanimated</code> ?</p>