1. Constraint Validation API

    API for better control over form field validation. Includes support for `checkValidity()`, `setCustomValidity()`, `reportValidity()` and validation states.

  2. elementinternals api: reportvalidity

  3. htmlbuttonelement api: reportvalidity

  4. htmlfieldsetelement api: reportvalidity

  5. htmlformelement api: reportvalidity

  6. htmlinputelement api: reportvalidity

  7. htmlobjectelement api: reportvalidity

  8. htmloutputelement api: reportvalidity

  9. htmlselectelement api: reportvalidity

  10. htmltextareaelement api: reportvalidity