Bootstrap4响应按钮大小

Bootstrap 4中是否有一种方法可以在media-breakpoint-xs中添加类'btn-sm'(小按钮)？

我希望按钮是默认大小,除了在xs屏幕,我希望它们自动切换到btn-sm.

指定.btn的.btn-sm利用媒体断点之间混入大小...

/* change all .btn to .btn-sm size on xs */
@include media-breakpoint-between(xs,sm){
  .btn {
      @include button-size($btn-padding-y-sm, $btn-padding-x-sm, $font-size-sm, $btn-border-radius-sm);
  }
}

https://www.codeply.com/go/FoEUO7XCDU

@include media-breakpoint-between(xs,sm){
  .btn {
      @include button-size($input-btn-padding-y-sm, $input-btn-padding-x-sm, $font-size-sm, $line-height-sm, $btn-border-radius-sm);
  }
}