what is the difference between card and modal in bootstrap 4 code example

Example 1: bootstrap modal

  Launch demo modal




  

    

      

        
Modal title
        
          ×
        
      
      

        ...
      
      

        Close
        Save changes
      
    
  

Example 2: bootstrap on hidden bs modal

$('#myModal').on('hidden.bs.modal', function (e) {
  // do something...
})