title: How to add class on mat-menu overlay in Angular 5?
body: <p>I checked mat-menu API (<a href="https://material.angular.io/components/menu/api#MatMenu" rel="noreferrer">https://material.angular.io/components/menu/api#MatMenu</a>) but I couldn't find how to add a class on mat-menu cdk overlay. </p>
  
  <p>I want to add a class on cdk overlay which contains mat-menu template. Can anyone help on the same?</p>
  
  <p>I want to add class on parent cdk overlay because in responsive menu is not opening correctly. Check this below image.</p>
  
  <p><a href="https://i.stack.imgur.com/Hmal2.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Hmal2.png" alt="enter image description here"></a></p>