Libraries can also be overridden to modify assets declared by other libraries, possibly added by a base theme, a module, or even the Drupal core. The ability to override libraries includes removing as well as replacing assets altogether. The same way we reference a library from our *.info.yml file, we can override libraries by adding the following:

libraries-override: 
 
  # Replace an entire library. 
  core/drupal.vertical-tabs: example/vertical-tabs 
   
  # Replace an asset with another. 
  core/drupal.vertical-tabs: 
    css: 
      component: 
        misc/vertical-tabs.css: css/vertical-tabs.css 
      
  # Remove an asset. 
  core/drupal.vertical-tabs: 
    css: 
      component: 
        misc/vertical-tabs.css: false 
      
  # Remove an entire library. 
  core/modernizr: false 

In this case, the libraries-override configuration achieves something different for each line. Whether it is replacing an entire library or removing an asset, we now have the flexibility to control assets.