jqwidgets-framework/demos/Angular/src/toolbar/resizabletoolbar/app.component.css

jQWidgets is an advanced Angular, Vue, Blazor, React, Web Components, jquery, ASP .NET MVC, Custom Elements and HTML5 UI framework.

.buttonIcon {
  margin: -5px 0 0 -3px;
  width: 16px;
  height: 17px;
}