This will show you how to handle form errors with Node.js and AngularJS when server-side validation is necessary. It highlights the erroneous field and displays an error message below indicating the problem. This example uses Node.js, Express, Express Validator, AngularJS and Bootstrap 3.
Web application based on the famous game "Simon says...". The particularity of this web page is that use your webcam for activate the buttons. Needs Google Chrome. A picture (web page in that case) speaks a thousand words :)http://programmingheroes.uphero.com/blog/SimonHTML5/index.html (It's a free host, sorry about the problems that this can generate. And sorry about my poor English)