# Checking if these elements support :optional.
== css-optional-textarea.html css-optional-textarea-ref.html
== css-optional-input.html css-optional-input-ref.html
== css-optional-select.html css-optional-select-ref.html
== css-optional-button.html about:blank

# Checking dynamic behavior.
== css-optional-dyn-1.html css-optional-input-ref.html
== css-optional-dyn-2.html about:blank

