title: how to pass dynamic parameter in external js url in Drupal 8
body: <p>We need to pass dynamic parameters(API Key) in external JS(Google MAP API URL) in the modulename.libraries.yml file. because, API Key is stored in Drupal Config form by Administrator.</p>
  
  <p>modulename.libraries.yml :
  <code>google.mapaddr:
    js:
      <a href="https://maps.googleapis.com/maps/api/js?key=" rel="nofollow noreferrer">https://maps.googleapis.com/maps/api/js?key=</a><strong>[API-KEY]</strong>&amp;libraries=places: { type: external }</code></p>
  
  <p>Please guide us to pass the Config variable to External JS parameters in Drupal 8 standards.</p>
  
  <p>Thanks in Advance.</p>