Implement the :valid and :invalid pseudo-classes #10781
Description
- Spec: https://html.spec.whatwg.org/multipage/#selector-invalid.
- Code:
components/style/selector_impl.rs,components/layout/wrapper.rs,components/script/dom/element.rs. - Test:
html/semantics/selectors/pseudo-classes/valid-invalid.html,dom/nodes/Element-closest.html.