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Improve Form element to fullfill the WCAG 2.0 level AA compliance

Found in

EPiServer.Forms 4.27.1

Fixed in

EPiServer.Forms 4.28.0

(Or a related package)

Created

Feb 17, 2020

Updated

Apr 03, 2020

State

Closed, Acceptance tests pass

Description

According to the discussion at https://www.yammer.com/emvp/#/threads/show?threadId=1083938207

We need to improve form element behavior, such as input validation, so the user can fix any errors.

  • If there is an error when submitting, set the input element's aria-invalid attribute = true.
  • Add the input element's aria-describedby attribute to the validation error message.
  • Added the alt attribute to some Img elements.
  • Removed the placeholder attribute if it is empty.
  • Fixed the tab order of the ImageChoiceElement so the validation works.
  • If the submit action fails, the image is focused as it is at the first invalid element.