If an attribute is not added to a role, what will happen with screen readers?

When an attribute is not added to a role in web accessibility, screen readers will still announce the role; however, the functionality may not operate as intended. This means that while users of screen readers will receive the information that an element has a specific role, they may not get the complete or accurate context if important attributes are missing. For example, a button with the role of "button" may be announced, but if it lacks the attribute that defines its purpose or behavior (like an event listener for activation), users might not comprehend how to interact with it effectively.

This behavior highlights the importance of not only defining roles but also ensuring that all relevant attributes are provided to allow users to fully understand and interact with the content. Attributes contribute to a richer experience, and without them, the experience could be less intuitive, even if the role itself is communicated.