title: How can create right menu sidebar on google map
body: <p>I want create menu sidebar on google map and onclick show menu description
  <br><br>
  right menu sidebar
  <img src="https://i.stack.imgur.com/1zjBz.png" alt="right menu sidebar">
  <br><br>
  show menu description if onclick
  <img src="https://i.stack.imgur.com/CrUu7.png" alt="show menu description">
  <br><br>
  I do this but menu fix on right window on browser. I want show menu on google map
  <img src="https://i.stack.imgur.com/GgmJM.png" alt="I do this">
  <br><br>
  How can I learn how to do.<br>
  Thank you</p>