TFA links to the spec - https://html.spec.whatwg.org/multipage/form-elements.html#attr-button-command https://html.spec.whatwg.org/multipage/form-elements.html#

TFA links to the spec - https://html.spec.whatwg.org/multipage/form-elements.html#attr-button-command https://html.spec.whatwg.org/multipage/form-elements.html#at... It's in Firefox and Safari