Now let's give them a form where they don't know what they've typed in the form. This happens to screen reader users when developers use rich text editing fields.
Hmm, so you hit a button and this box popped up on the screen wanting something from you. It's kinda a problem since you don't know what it wants or how to make it go away. Sometimes you might not know it's there. Your screen reader might not tell you, so you keep going over the same page trying to figure out why the button didn't work. It is really frustrating and really messes with usability.
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