Principle 3 - Understandable

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Conformance Levels


Information and the operation of user interface must be understandable.

Questions & Answers

What if a select box changes the rest of my form?

If form content changes after selecting a value in a select box, is it necessary to explain in advance in text that the form will change and should that be read aloud? Or do I have to provide a submit button to initiate the change...

  • change of context
  • forms
  • select box

Are there multiple ways to build an accessible widget?

I'm trying to build a widget that follows an example in the W3C ARIA Authoring Practices Guide, but I can't quite match it because of the way my site is built. Can my widget still be accessible?

  • aria
  • custom widgets