Implements the document object model (DOM) representation of the fieldSet element.
The HTMLFieldSetElement object has these types of members:
The HTMLFieldSetElement object has these methods.
Returns whether a form will validate when it is submitted, without having to submit it.
Sets a custom error message that is displayed when a form is submitted.
The HTMLFieldSetElement object has these properties.
Returns the error message that would be displayed if the user submits the form, or an empty string if no error message.
Returns a ValidityState object that represents the validity states of an element.
Returns whether an element will successfully validate based on forms validation rules and constraints.