title: How to add map application into webpage
body: <p>I would like to insert <a href="https://www.ordnancesurvey.co.uk/counties-app/" rel="nofollow noreferrer">this map</a> application into my website:</p>
  
  <p>Can anyone tell me if this is possible only by JavaScript? If so, how can this be done?</p>
  
  <p>I would appreciate any answer.</p>