Optionally, the element with role button has a value specified for aria-controls that refers to the element that contains all the content that is shown or hidden.When the content area is hidden, it is set to false. When the content is visible, the element with role button has aria-expanded set to true.The element that shows and hides the content has role button.
When the content is visible, the arrow or triangle typically points down.
When the controlled content is hidden, it is often styled as a typical push button with a right-pointing arrow or triangle to hint that activating the button will display additional content. This is perhaps the most relevant bits of litterature I could find on the subject:Ī disclosure is a button that controls visibility of a section of content.
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