The button element with a type attribute whose value is "submit" represents a button for submitting a form.
submit
button.submit = (normal-character-data & common.elem.flow*) & button.submit.attrs
button.submit.attrs = (common.attrs & name? & disabled? & form? & type? & value?) & (formaction? & autofocus? & formenctype? & formmethod? & formtarget? & formnovalidate?)
A button element must have both a start tag and an end tag.