At this point, you understand that your Vaadin UI components are rendered as HTML elements. Each element has a
class attribute. If you know the value for this property, you can add Sass rules to it. Nice. However, how to know the value of this property? Most web browsers include developer tools to inspect the HTML being rendered. We are going to take a fast look at how to inspect HTML in Firefox and Chrome.
Chrome DevTools is the Chrome counterpart of Firebug. Chrome DevTools is bundled in Chrome.
Internet Explorer ships with Developer Tools. ...