title: How to disable angular input field by using mat-slide-toggle?
body: <p>How to disable angular mat-form-field(input) field using <a href="https://material.angular.io/components/slide-toggle/overview" rel="nofollow noreferrer">mat-slide-toggle</a> in reactive forms, when slide toggle on input field is true it should be enabled otherwise input 
  field should be disabled.  </p>