APA review of Web App Manifest

Participants in the Accessible Platform Architectures Working Group 
reviewed Web App Manifest https://www.w3.org/TR/appmanifest/ and have 
the following comments:


    Substantive Comments

splash_screens

  * There is no method to provide text alternatives for splash screens.
    While not their primary purpose, splash screens are sometimes used
    to convey hints and tips about how to use an application. The
    manifest provides no method for a developer to provide that same
    information in a textual form.


    Editorial comments

  * A number of places where the colour contrast ratio of 4.5:1 is not
    met (red text within issue sections, yellow and green text within
    Examples, green text within Note sections
  * Figure 1 should have some type of long description for the image
  * The are 3 unlabeled checkboxes in the Issue 323 section.