An expand/collapse widget, often called an accordion or a disclosure widget, allows users to toggle the visibility of content. This helps in managing screen real estate by hiding information until it is requested.
This implementation uses vanilla JavaScript to toggle the `aria-expanded` attribute on the button and dynamically sets the `max-height` of the content container to create a smooth sliding animation.
Yes. By using proper HTML buttons and ARIA attributes like `aria-expanded` and `aria-controls`, screen readers can understand the relationship between the toggle and the content, and announce the state changes correctly.