HTML Checking for Large Sites

Rocket Validator automatically checks your pages on the W3C Validator.

Attribute “required” is only allowed when the input type is “checkbox”, “date”, “datetime-local”, “email”, “file”, “month”, “number”, “password”, “radio”, “search”, “tel”, “text”, “time”, “url”, or “week”.

The boolean required attribute can only be used with certain types of inputs. Check the input type is one of the allowed.

The required attribute, if present, indicates that the user must specify a value for the input before the owning form can be submitted.

Learn more:

Related W3C validator issues

Still checking your large sites one page at a time?

Save time using our automated web checker. Let our crawler check your web pages on the W3C Validator.