and patterns (e.g. email addresses and credit card numbers), but ASP.Net Core can check for validation errors in submitted HTML form values automatically. A model state in ASP.Net Core is a ...

It also offers a validator service to ensure that your HTML (among other code) is valid and error-free. Making sure that your page validates is one of the most important things one can do to ...

A recent tweet from Google’s Gary Illyes called attention to problem of invalid HTML. Google is fine with invalid HTML. Less well known is that there are negative outcomes associated with ...

It can also reformat your HTML for you. That means live on-the-fly validation, and autocorrect for HTML5, as you type. Its ...