mtrootyy

Because `dialog` element is allowed(https://github.com/validator/validator/commit/d82970bafeb45d6b54eabad588ac200473570820), `dialog` value of `method` and `formmethod` attribute also should be allowed.

1. The following sentence should be added. > User agents **can** support autocorrection of editable text, either in form controls (such as the value of `textarea` elements), or in elements...

Moreover, dirname apply to password/submit inputs. Ref: https://github.com/whatwg/html/commit/11114d092abeaf93e89f8f1259167c26718a3abe

popoverhidetarget, popovershowtarget and popovertoggletarget attribute was remove from button element and input element. popovertarget, popovertargetaction attribute was added to button element and input element. Ref: https://github.com/whatwg/html/commit/dc27ce80e606255eeafa9fe5a4b7e9b8122c40cf

@scottaohara To ensure backwards compatible, even if the optgroup element contains a legend element, the label attribute on the optgroup element must be specified.

Add to "request-close" of "command" attribute of "button" element. Ref: https://github.com/whatwg/html/commit/8eaf940e19e0994bd778684b4407086fc1ffbd64

The following changes are also required: 4.10.7 The select element If a select element has a required attribute specified, **does not have a multiple attribute specified,** and has a display...

css was added. appearance: base-select

``` Test select, ::picker(select) { appearance: base-select; } ``` ↓check result ``` Error: CSS: Parse Error. ::picker(select) { Error: CSS: appearance: base-select is not a appearance value. ``` The above...