Candidate Set:

Any element that has the aria-checked attribute


option elements
elements with  type=radio attribute
elements with  type=checkbox attribute
elements with  type=menuitemcheckbox attribute
elements  element with  type=menuitemradio attribute
elements with the aria role="option"
elements with the aria role="menuitem"
elements with the aria role="radio"
elements with the aria role="checkbox"
elements with the aria role="treeitem"

Will flag aria-checked
Will not flag option element
Will not flag type radio
Will not flag type checkbox
Will not flag type menuitemcheckbox
Will not flag type menuitemradio
Will not flag role option
Will not flag role menuitem
Will not flag role radio
Will not flag role checkbox
Will not flag role treeitem