1. :default CSS pseudo-class

    The `:default` pseudo-class matches checkboxes and radio buttons which are checked by default, `<option>`s with the `selected` attribute, and the default submit button (if any) of a form.

  2. Form attribute

    Attribute for associating input and submit buttons with a form.

  3. Attributes for form submission

    Attributes for form submission that may be specified on submit buttons. The attributes are: `formaction`, `formenctype`, `formmethod`, `formnovalidate`, and `formtarget`

  4. htmlbuttonelement api: form

  5. htmlbuttonelement api: formaction

  6. htmlbuttonelement api: formenctype

  7. htmlbuttonelement api: formmethod

  8. htmlbuttonelement api: formnovalidate

  9. htmlbuttonelement api: formtarget